./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/sll-buckets-2.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_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/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_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/sll-buckets-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/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_37f8625a-12ff-4622-83e0-b382e9102fea/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 57fc1af3da22ce54c30e1aa642eaa8a52bbdae67 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/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_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/sll-buckets-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/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_37f8625a-12ff-4622-83e0-b382e9102fea/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 57fc1af3da22ce54c30e1aa642eaa8a52bbdae67 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:08:08,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:08:08,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:08:08,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:08:08,358 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:08:08,359 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:08:08,361 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:08:08,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:08:08,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:08:08,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:08:08,367 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:08:08,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:08:08,369 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:08:08,371 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:08:08,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:08:08,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:08:08,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:08:08,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:08:08,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:08:08,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:08:08,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:08:08,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:08:08,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:08:08,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:08:08,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:08:08,415 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:08:08,416 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:08:08,418 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:08:08,420 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:08:08,421 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:08:08,423 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:08:08,424 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:08:08,425 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:08:08,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:08:08,428 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:08:08,429 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:08:08,430 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:08:08,431 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:08:08,431 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:08:08,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:08:08,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:08:08,434 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:08:08,477 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:08:08,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:08:08,479 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:08:08,479 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:08:08,479 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:08:08,480 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:08:08,480 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:08:08,480 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:08:08,480 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:08:08,480 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:08:08,482 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:08:08,482 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:08:08,482 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:08:08,482 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:08:08,483 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:08:08,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:08:08,484 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:08:08,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:08:08,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:08:08,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:08:08,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:08:08,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:08:08,485 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:08:08,485 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:08:08,485 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:08:08,485 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:08:08,486 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:08:08,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:08:08,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:08:08,488 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:08:08,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:08:08,488 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:08:08,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:08:08,489 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:08:08,489 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:08:08,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:08:08,489 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:08:08,490 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:08:08,490 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:08:08,490 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_37f8625a-12ff-4622-83e0-b382e9102fea/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57fc1af3da22ce54c30e1aa642eaa8a52bbdae67 [2021-10-13 07:08:08,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:08:08,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:08:08,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:08:08,763 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:08:08,764 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:08:08,765 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/forester-heap/sll-buckets-2.i [2021-10-13 07:08:08,844 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/data/ea45db058/29b1fdec6b8c49d399875ae1dd895ad4/FLAGe4426c346 [2021-10-13 07:08:09,409 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:08:09,418 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/sv-benchmarks/c/forester-heap/sll-buckets-2.i [2021-10-13 07:08:09,442 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/data/ea45db058/29b1fdec6b8c49d399875ae1dd895ad4/FLAGe4426c346 [2021-10-13 07:08:09,714 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/data/ea45db058/29b1fdec6b8c49d399875ae1dd895ad4 [2021-10-13 07:08:09,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:08:09,719 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:08:09,720 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:08:09,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:08:09,724 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:08:09,725 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:08:09" (1/1) ... [2021-10-13 07:08:09,726 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fd3857 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:09, skipping insertion in model container [2021-10-13 07:08:09,726 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:08:09" (1/1) ... [2021-10-13 07:08:09,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:08:09,776 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:08:10,053 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_37f8625a-12ff-4622-83e0-b382e9102fea/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22663,22676] [2021-10-13 07:08:10,057 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_37f8625a-12ff-4622-83e0-b382e9102fea/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22734,22747] [2021-10-13 07:08:10,059 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_37f8625a-12ff-4622-83e0-b382e9102fea/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22862,22875] [2021-10-13 07:08:10,063 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_37f8625a-12ff-4622-83e0-b382e9102fea/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23275,23288] [2021-10-13 07:08:10,064 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_37f8625a-12ff-4622-83e0-b382e9102fea/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23364,23377] [2021-10-13 07:08:10,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:08:10,076 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:08:10,111 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_37f8625a-12ff-4622-83e0-b382e9102fea/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22663,22676] [2021-10-13 07:08:10,112 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_37f8625a-12ff-4622-83e0-b382e9102fea/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22734,22747] [2021-10-13 07:08:10,114 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_37f8625a-12ff-4622-83e0-b382e9102fea/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22862,22875] [2021-10-13 07:08:10,117 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_37f8625a-12ff-4622-83e0-b382e9102fea/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23275,23288] [2021-10-13 07:08:10,118 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_37f8625a-12ff-4622-83e0-b382e9102fea/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23364,23377] [2021-10-13 07:08:10,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:08:10,149 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:08:10,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:10 WrapperNode [2021-10-13 07:08:10,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:08:10,151 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:08:10,151 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:08:10,151 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:08:10,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:10" (1/1) ... [2021-10-13 07:08:10,173 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:10" (1/1) ... [2021-10-13 07:08:10,200 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:08:10,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:08:10,201 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:08:10,201 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:08:10,209 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:10" (1/1) ... [2021-10-13 07:08:10,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:10" (1/1) ... [2021-10-13 07:08:10,214 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:10" (1/1) ... [2021-10-13 07:08:10,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:10" (1/1) ... [2021-10-13 07:08:10,223 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:10" (1/1) ... [2021-10-13 07:08:10,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:10" (1/1) ... [2021-10-13 07:08:10,231 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:10" (1/1) ... [2021-10-13 07:08:10,234 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:08:10,235 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:08:10,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:08:10,236 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:08:10,240 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:10" (1/1) ... [2021-10-13 07:08:10,258 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:08:10,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:08:10,303 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:08:10,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:08:10,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 07:08:10,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 07:08:10,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:08:10,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:08:10,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:08:10,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:08:10,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:08:10,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:08:10,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:08:10,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:08:11,213 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:08:11,213 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-10-13 07:08:11,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:08:11 BoogieIcfgContainer [2021-10-13 07:08:11,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:08:11,217 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:08:11,218 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:08:11,221 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:08:11,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:08:09" (1/3) ... [2021-10-13 07:08:11,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44447c0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:08:11, skipping insertion in model container [2021-10-13 07:08:11,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:10" (2/3) ... [2021-10-13 07:08:11,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44447c0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:08:11, skipping insertion in model container [2021-10-13 07:08:11,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:08:11" (3/3) ... [2021-10-13 07:08:11,224 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-buckets-2.i [2021-10-13 07:08:11,229 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:08:11,230 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-10-13 07:08:11,310 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:08:11,321 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 07:08:11,321 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-13 07:08:11,337 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 31 states have (on average 1.935483870967742) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:08:11,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:08:11,350 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:08:11,350 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:08:11,351 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 07:08:11,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:08:11,356 INFO L82 PathProgramCache]: Analyzing trace with hash 196178540, now seen corresponding path program 1 times [2021-10-13 07:08:11,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:08:11,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764003065] [2021-10-13 07:08:11,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:11,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:08:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:11,703 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 07:08:11,704 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:08:11,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764003065] [2021-10-13 07:08:11,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764003065] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:08:11,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:08:11,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:08:11,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264502877] [2021-10-13 07:08:11,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:08:11,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:08:11,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:08:11,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:08:11,744 INFO L87 Difference]: Start difference. First operand has 37 states, 31 states have (on average 1.935483870967742) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:08:11,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:08:11,846 INFO L93 Difference]: Finished difference Result 96 states and 160 transitions. [2021-10-13 07:08:11,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:08:11,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 07:08:11,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:08:11,856 INFO L225 Difference]: With dead ends: 96 [2021-10-13 07:08:11,856 INFO L226 Difference]: Without dead ends: 59 [2021-10-13 07:08:11,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:08:11,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-13 07:08:11,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 37. [2021-10-13 07:08:11,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.303030303030303) internal successors, (43), 36 states have internal predecessors, (43), 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 07:08:11,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-10-13 07:08:11,892 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 5 [2021-10-13 07:08:11,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:08:11,892 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-10-13 07:08:11,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:08:11,893 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-10-13 07:08:11,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:08:11,893 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:08:11,893 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:08:11,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:08:11,894 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 07:08:11,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:08:11,895 INFO L82 PathProgramCache]: Analyzing trace with hash -450856688, now seen corresponding path program 1 times [2021-10-13 07:08:11,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:08:11,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156733561] [2021-10-13 07:08:11,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:11,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:08:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:11,986 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 07:08:11,987 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:08:11,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156733561] [2021-10-13 07:08:11,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156733561] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:08:11,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:08:11,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:08:11,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108032576] [2021-10-13 07:08:11,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:08:11,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:08:11,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:08:11,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:08:11,990 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 07:08:12,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:08:12,061 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-10-13 07:08:12,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:08:12,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 07:08:12,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:08:12,063 INFO L225 Difference]: With dead ends: 41 [2021-10-13 07:08:12,064 INFO L226 Difference]: Without dead ends: 39 [2021-10-13 07:08:12,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:08:12,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-13 07:08:12,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2021-10-13 07:08:12,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 32 states have (on average 1.28125) internal successors, (41), 34 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 07:08:12,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-10-13 07:08:12,077 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 7 [2021-10-13 07:08:12,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:08:12,077 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-10-13 07:08:12,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 07:08:12,078 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-10-13 07:08:12,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:08:12,080 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:08:12,080 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:08:12,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:08:12,086 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 07:08:12,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:08:12,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1874340424, now seen corresponding path program 1 times [2021-10-13 07:08:12,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:08:12,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232001572] [2021-10-13 07:08:12,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:12,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:08:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:12,178 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 07:08:12,178 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:08:12,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232001572] [2021-10-13 07:08:12,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232001572] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:08:12,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:08:12,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:08:12,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530775550] [2021-10-13 07:08:12,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:08:12,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:08:12,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:08:12,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:08:12,180 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) 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 07:08:12,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:08:12,206 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-10-13 07:08:12,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:08:12,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) 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 07:08:12,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:08:12,208 INFO L225 Difference]: With dead ends: 39 [2021-10-13 07:08:12,208 INFO L226 Difference]: Without dead ends: 37 [2021-10-13 07:08:12,209 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:08:12,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-13 07:08:12,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2021-10-13 07:08:12,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:08:12,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-10-13 07:08:12,214 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 8 [2021-10-13 07:08:12,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:08:12,214 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-10-13 07:08:12,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) 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 07:08:12,215 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-10-13 07:08:12,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 07:08:12,216 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:08:12,216 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:08:12,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:08:12,216 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 07:08:12,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:08:12,217 INFO L82 PathProgramCache]: Analyzing trace with hash 2023416261, now seen corresponding path program 1 times [2021-10-13 07:08:12,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:08:12,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639129956] [2021-10-13 07:08:12,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:12,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:08:12,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:12,383 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 07:08:12,383 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:08:12,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639129956] [2021-10-13 07:08:12,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639129956] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:08:12,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:08:12,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 07:08:12,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044971915] [2021-10-13 07:08:12,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:08:12,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:08:12,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:08:12,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:08:12,390 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:08:12,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:08:12,582 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2021-10-13 07:08:12,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:08:12,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 07:08:12,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:08:12,586 INFO L225 Difference]: With dead ends: 53 [2021-10-13 07:08:12,587 INFO L226 Difference]: Without dead ends: 42 [2021-10-13 07:08:12,588 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:08:12,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-13 07:08:12,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2021-10-13 07:08:12,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 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 07:08:12,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2021-10-13 07:08:12,602 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 9 [2021-10-13 07:08:12,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:08:12,602 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2021-10-13 07:08:12,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:08:12,603 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2021-10-13 07:08:12,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 07:08:12,604 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:08:12,604 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:08:12,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 07:08:12,605 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 07:08:12,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:08:12,605 INFO L82 PathProgramCache]: Analyzing trace with hash 783479132, now seen corresponding path program 1 times [2021-10-13 07:08:12,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:08:12,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425478783] [2021-10-13 07:08:12,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:12,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:08:12,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:12,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:12,764 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:08:12,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425478783] [2021-10-13 07:08:12,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425478783] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:08:12,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640875625] [2021-10-13 07:08:12,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:12,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:08:12,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:08:12,771 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:08:12,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:08:12,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:12,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 07:08:12,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:13,275 INFO L354 Elim1Store]: treesize reduction 255, result has 13.3 percent of original size [2021-10-13 07:08:13,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 233 treesize of output 249 [2021-10-13 07:08:13,318 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:13,328 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 266 [2021-10-13 07:08:13,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:13,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:08:13,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:13,456 INFO L354 Elim1Store]: treesize reduction 228, result has 14.3 percent of original size [2021-10-13 07:08:13,457 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 5 case distinctions, treesize of input 266 treesize of output 204 [2021-10-13 07:08:13,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:13,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:08:13,600 INFO L354 Elim1Store]: treesize reduction 284, result has 12.3 percent of original size [2021-10-13 07:08:13,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 363 treesize of output 209 [2021-10-13 07:08:15,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 391 treesize of output 388 [2021-10-13 07:08:15,110 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-13 07:08:15,111 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 388 treesize of output 353 [2021-10-13 07:08:15,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:15,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:08:15,344 INFO L354 Elim1Store]: treesize reduction 584, result has 8.5 percent of original size [2021-10-13 07:08:15,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 22 case distinctions, treesize of input 353 treesize of output 266 [2021-10-13 07:08:15,493 INFO L354 Elim1Store]: treesize reduction 160, result has 33.6 percent of original size [2021-10-13 07:08:15,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 318 treesize of output 372 [2021-10-13 07:08:15,686 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 104 treesize of output 98 [2021-10-13 07:08:15,696 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 95 treesize of output 89 [2021-10-13 07:08:15,708 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 86 treesize of output 80 [2021-10-13 07:08:15,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-10-13 07:08:16,374 INFO L354 Elim1Store]: treesize reduction 201, result has 2.0 percent of original size [2021-10-13 07:08:16,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 125 treesize of output 53 [2021-10-13 07:08:16,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:16,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:16,499 INFO L354 Elim1Store]: treesize reduction 44, result has 15.4 percent of original size [2021-10-13 07:08:16,500 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 227 treesize of output 178 [2021-10-13 07:08:16,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 178 treesize of output 178 [2021-10-13 07:08:16,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-10-13 07:08:16,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1855474620] [2021-10-13 07:08:16,545 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-10-13 07:08:16,546 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:08:16,550 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:08:16,555 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:08:16,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:08:16,587 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,593 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,594 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,594 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,595 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,595 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-10-13 07:08:16,596 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:08:16,597 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,598 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,598 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,599 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,599 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-10-13 07:08:16,600 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:08:16,601 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,602 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,602 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,603 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,603 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-10-13 07:08:16,604 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-10-13 07:08:16,605 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,606 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,607 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,607 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,608 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-10-13 07:08:16,608 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-10-13 07:08:16,609 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,610 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,611 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,611 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,612 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-10-13 07:08:16,612 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 07:08:16,613 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,614 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,615 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,615 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,616 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-10-13 07:08:16,617 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-10-13 07:08:16,618 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,619 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,619 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,620 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,620 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-10-13 07:08:16,621 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-10-13 07:08:16,622 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,622 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,623 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,623 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,629 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-10-13 07:08:16,630 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-10-13 07:08:16,630 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,631 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,632 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,632 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,634 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-10-13 07:08:16,634 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 07:08:16,635 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,636 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,636 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,637 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,637 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,638 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,638 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-10-13 07:08:16,639 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:08:16,639 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,639 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,642 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-10-13 07:08:16,643 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-10-13 07:08:16,644 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,644 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,645 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,645 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,646 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-10-13 07:08:16,646 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-10-13 07:08:16,647 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,648 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,648 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,648 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,654 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-10-13 07:08:16,655 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-10-13 07:08:16,656 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,656 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,657 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,657 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,658 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,658 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,659 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-10-13 07:08:16,659 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:08:16,660 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,660 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,662 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-10-13 07:08:16,663 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-10-13 07:08:16,664 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,664 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,665 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,665 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,672 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-10-13 07:08:16,672 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-10-13 07:08:16,673 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,673 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,674 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,675 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,675 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-10-13 07:08:16,676 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-10-13 07:08:16,678 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,679 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,680 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,680 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,681 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-10-13 07:08:16,681 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-10-13 07:08:16,682 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,684 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,687 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,690 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,690 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,691 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,691 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-10-13 07:08:16,692 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-10-13 07:08:16,692 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,693 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,693 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,694 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,694 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-10-13 07:08:16,695 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 07:08:16,695 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,696 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,696 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,697 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,697 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-10-13 07:08:16,698 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-10-13 07:08:16,698 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,699 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,699 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,700 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,700 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-10-13 07:08:16,701 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-10-13 07:08:16,701 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,702 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,703 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 281 [2021-10-13 07:08:16,704 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 282 [2021-10-13 07:08:16,705 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:16,706 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:16,711 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 478 [2021-10-13 07:08:16,714 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 541 [2021-10-13 07:08:16,726 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@567c0fed 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 07:08:16,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:08:16,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-13 07:08:16,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696217676] [2021-10-13 07:08:16,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:08:16,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:08:16,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:08:16,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:08:16,729 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 07:08:16,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:08:16,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:08:16,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:08:16,944 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@567c0fed 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 07:08:16,946 INFO L168 Benchmark]: Toolchain (without parser) took 7226.99 ms. Allocated memory was 127.9 MB in the beginning and 155.2 MB in the end (delta: 27.3 MB). Free memory was 93.3 MB in the beginning and 62.2 MB in the end (delta: 31.1 MB). Peak memory consumption was 57.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:08:16,946 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 88.1 MB. Free memory is still 46.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:08:16,946 INFO L168 Benchmark]: CACSL2BoogieTranslator took 429.74 ms. Allocated memory is still 127.9 MB. Free memory was 93.3 MB in the beginning and 94.3 MB in the end (delta: -978.4 kB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:08:16,946 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.95 ms. Allocated memory is still 127.9 MB. Free memory was 94.3 MB in the beginning and 92.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:08:16,947 INFO L168 Benchmark]: Boogie Preprocessor took 34.22 ms. Allocated memory is still 127.9 MB. Free memory was 92.2 MB in the beginning and 90.6 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:08:16,947 INFO L168 Benchmark]: RCFGBuilder took 980.49 ms. Allocated memory is still 127.9 MB. Free memory was 90.6 MB in the beginning and 101.5 MB in the end (delta: -11.0 MB). Peak memory consumption was 32.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:08:16,947 INFO L168 Benchmark]: TraceAbstraction took 5727.65 ms. Allocated memory was 127.9 MB in the beginning and 155.2 MB in the end (delta: 27.3 MB). Free memory was 100.9 MB in the beginning and 62.2 MB in the end (delta: 38.7 MB). Peak memory consumption was 65.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:08:16,949 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 88.1 MB. Free memory is still 46.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 429.74 ms. Allocated memory is still 127.9 MB. Free memory was 93.3 MB in the beginning and 94.3 MB in the end (delta: -978.4 kB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.95 ms. Allocated memory is still 127.9 MB. Free memory was 94.3 MB in the beginning and 92.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.22 ms. Allocated memory is still 127.9 MB. Free memory was 92.2 MB in the beginning and 90.6 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 980.49 ms. Allocated memory is still 127.9 MB. Free memory was 90.6 MB in the beginning and 101.5 MB in the end (delta: -11.0 MB). Peak memory consumption was 32.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5727.65 ms. Allocated memory was 127.9 MB in the beginning and 155.2 MB in the end (delta: 27.3 MB). Free memory was 100.9 MB in the beginning and 62.2 MB in the end (delta: 38.7 MB). Peak memory consumption was 65.7 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@567c0fed de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@567c0fed: 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 07:08:16,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/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 07:08:19,476 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:08:19,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:08:19,511 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:08:19,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:08:19,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:08:19,515 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:08:19,518 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:08:19,520 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:08:19,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:08:19,523 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:08:19,525 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:08:19,525 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:08:19,527 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:08:19,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:08:19,530 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:08:19,531 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:08:19,532 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:08:19,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:08:19,537 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:08:19,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:08:19,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:08:19,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:08:19,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:08:19,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:08:19,548 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:08:19,549 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:08:19,550 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:08:19,551 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:08:19,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:08:19,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:08:19,554 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:08:19,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:08:19,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:08:19,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:08:19,558 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:08:19,559 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:08:19,560 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:08:19,560 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:08:19,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:08:19,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:08:19,564 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:08:19,592 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:08:19,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:08:19,593 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:08:19,594 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:08:19,594 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:08:19,594 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:08:19,595 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:08:19,595 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:08:19,595 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:08:19,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:08:19,596 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:08:19,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:08:19,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:08:19,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:08:19,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:08:19,598 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:08:19,598 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:08:19,598 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:08:19,599 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:08:19,599 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:08:19,599 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:08:19,600 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:08:19,600 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:08:19,600 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:08:19,600 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:08:19,601 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:08:19,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:08:19,601 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:08:19,602 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:08:19,602 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:08:19,602 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:08:19,603 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:08:19,603 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:08:19,603 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:08:19,603 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:08:19,604 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_37f8625a-12ff-4622-83e0-b382e9102fea/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57fc1af3da22ce54c30e1aa642eaa8a52bbdae67 [2021-10-13 07:08:19,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:08:19,987 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:08:19,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:08:19,991 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:08:19,992 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:08:19,993 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/forester-heap/sll-buckets-2.i [2021-10-13 07:08:20,071 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/data/7cc19f537/f176cad786ec43bc91678e6aad3c3ecd/FLAG0e178949c [2021-10-13 07:08:20,739 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:08:20,740 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/sv-benchmarks/c/forester-heap/sll-buckets-2.i [2021-10-13 07:08:20,755 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/data/7cc19f537/f176cad786ec43bc91678e6aad3c3ecd/FLAG0e178949c [2021-10-13 07:08:20,966 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/data/7cc19f537/f176cad786ec43bc91678e6aad3c3ecd [2021-10-13 07:08:20,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:08:20,971 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:08:20,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:08:20,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:08:20,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:08:20,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:08:20" (1/1) ... [2021-10-13 07:08:20,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d648c76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:20, skipping insertion in model container [2021-10-13 07:08:20,984 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:08:20" (1/1) ... [2021-10-13 07:08:20,993 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:08:21,046 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:08:21,373 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_37f8625a-12ff-4622-83e0-b382e9102fea/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22663,22676] [2021-10-13 07:08:21,377 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_37f8625a-12ff-4622-83e0-b382e9102fea/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22734,22747] [2021-10-13 07:08:21,379 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_37f8625a-12ff-4622-83e0-b382e9102fea/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22862,22875] [2021-10-13 07:08:21,384 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_37f8625a-12ff-4622-83e0-b382e9102fea/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23275,23288] [2021-10-13 07:08:21,385 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_37f8625a-12ff-4622-83e0-b382e9102fea/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23364,23377] [2021-10-13 07:08:21,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:08:21,416 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:08:21,456 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_37f8625a-12ff-4622-83e0-b382e9102fea/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22663,22676] [2021-10-13 07:08:21,457 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_37f8625a-12ff-4622-83e0-b382e9102fea/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22734,22747] [2021-10-13 07:08:21,459 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_37f8625a-12ff-4622-83e0-b382e9102fea/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22862,22875] [2021-10-13 07:08:21,463 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_37f8625a-12ff-4622-83e0-b382e9102fea/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23275,23288] [2021-10-13 07:08:21,464 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_37f8625a-12ff-4622-83e0-b382e9102fea/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23364,23377] [2021-10-13 07:08:21,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:08:21,501 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:08:21,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:21 WrapperNode [2021-10-13 07:08:21,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:08:21,503 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:08:21,503 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:08:21,503 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:08:21,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:21" (1/1) ... [2021-10-13 07:08:21,530 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:21" (1/1) ... [2021-10-13 07:08:21,560 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:08:21,561 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:08:21,561 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:08:21,561 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:08:21,578 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:21" (1/1) ... [2021-10-13 07:08:21,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:21" (1/1) ... [2021-10-13 07:08:21,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:21" (1/1) ... [2021-10-13 07:08:21,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:21" (1/1) ... [2021-10-13 07:08:21,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:21" (1/1) ... [2021-10-13 07:08:21,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:21" (1/1) ... [2021-10-13 07:08:21,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:21" (1/1) ... [2021-10-13 07:08:21,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:08:21,633 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:08:21,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:08:21,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:08:21,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:21" (1/1) ... [2021-10-13 07:08:21,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:08:21,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:08:21,677 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:08:21,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:08:21,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 07:08:21,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:08:21,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:08:21,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:08:21,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:08:21,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:08:21,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 07:08:21,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:08:21,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:08:21,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:08:24,426 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:08:24,426 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-10-13 07:08:24,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:08:24 BoogieIcfgContainer [2021-10-13 07:08:24,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:08:24,430 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:08:24,430 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:08:24,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:08:24,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:08:20" (1/3) ... [2021-10-13 07:08:24,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1260dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:08:24, skipping insertion in model container [2021-10-13 07:08:24,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:21" (2/3) ... [2021-10-13 07:08:24,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1260dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:08:24, skipping insertion in model container [2021-10-13 07:08:24,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:08:24" (3/3) ... [2021-10-13 07:08:24,452 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-buckets-2.i [2021-10-13 07:08:24,457 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:08:24,457 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-10-13 07:08:24,534 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:08:24,544 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 07:08:24,545 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-13 07:08:24,563 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 42 states have internal predecessors, (70), 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 07:08:24,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:08:24,570 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:08:24,570 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:08:24,571 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 07:08:24,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:08:24,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1810667474, now seen corresponding path program 1 times [2021-10-13 07:08:24,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:08:24,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2039158079] [2021-10-13 07:08:24,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:24,609 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:08:24,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:08:24,615 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:08:24,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:08:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:24,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:08:24,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:24,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:24,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:24,874 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 07:08:24,875 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:08:24,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2039158079] [2021-10-13 07:08:24,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2039158079] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:08:24,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:08:24,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-13 07:08:24,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334572664] [2021-10-13 07:08:24,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:08:24,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:08:24,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:08:24,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:08:24,901 INFO L87 Difference]: Start difference. First operand has 43 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 42 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 07:08:25,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:08:25,081 INFO L93 Difference]: Finished difference Result 109 states and 185 transitions. [2021-10-13 07:08:25,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:08:25,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 07:08:25,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:08:25,091 INFO L225 Difference]: With dead ends: 109 [2021-10-13 07:08:25,091 INFO L226 Difference]: Without dead ends: 64 [2021-10-13 07:08:25,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:08:25,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-13 07:08:25,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 40. [2021-10-13 07:08:25,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 39 states have internal predecessors, (48), 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 07:08:25,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2021-10-13 07:08:25,127 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 7 [2021-10-13 07:08:25,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:08:25,128 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2021-10-13 07:08:25,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 07:08:25,128 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2021-10-13 07:08:25,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:08:25,129 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:08:25,129 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:08:25,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-13 07:08:25,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:08:25,342 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 07:08:25,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:08:25,344 INFO L82 PathProgramCache]: Analyzing trace with hash 332382386, now seen corresponding path program 1 times [2021-10-13 07:08:25,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:08:25,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [171837375] [2021-10-13 07:08:25,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:25,345 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:08:25,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:08:25,346 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:08:25,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:08:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:25,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:08:25,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:25,524 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 07:08:25,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:25,557 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 07:08:25,557 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:08:25,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [171837375] [2021-10-13 07:08:25,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [171837375] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:08:25,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:08:25,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:08:25,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469116142] [2021-10-13 07:08:25,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:08:25,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:08:25,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:08:25,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:08:25,562 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) 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 07:08:25,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:08:25,639 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2021-10-13 07:08:25,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:08:25,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) 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 07:08:25,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:08:25,641 INFO L225 Difference]: With dead ends: 43 [2021-10-13 07:08:25,641 INFO L226 Difference]: Without dead ends: 41 [2021-10-13 07:08:25,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:08:25,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-13 07:08:25,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-10-13 07:08:25,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 37 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:08:25,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-10-13 07:08:25,654 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 8 [2021-10-13 07:08:25,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:08:25,655 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-10-13 07:08:25,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) 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 07:08:25,655 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-10-13 07:08:25,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 07:08:25,656 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:08:25,656 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:08:25,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:08:25,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:08:25,866 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 07:08:25,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:08:25,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1713955348, now seen corresponding path program 1 times [2021-10-13 07:08:25,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:08:25,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229755802] [2021-10-13 07:08:25,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:25,870 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:08:25,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:08:25,872 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:08:25,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:08:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:26,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 07:08:26,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:26,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:26,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:26,219 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 207 treesize of output 182 [2021-10-13 07:08:26,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:08:27,222 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-10-13 07:08:27,222 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 227 treesize of output 165 [2021-10-13 07:08:27,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:08:28,257 INFO L354 Elim1Store]: treesize reduction 82, result has 27.4 percent of original size [2021-10-13 07:08:28,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 249 treesize of output 171 [2021-10-13 07:08:28,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:28,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:28,294 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 249 treesize of output 212 [2021-10-13 07:08:28,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:08:28,353 INFO L354 Elim1Store]: treesize reduction 50, result has 25.4 percent of original size [2021-10-13 07:08:28,354 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 3 case distinctions, treesize of input 212 treesize of output 163 [2021-10-13 07:08:28,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:08:28,511 INFO L354 Elim1Store]: treesize reduction 178, result has 18.0 percent of original size [2021-10-13 07:08:28,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 157 treesize of output 169 [2021-10-13 07:08:28,518 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 07:08:28,543 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-10-13 07:08:28,543 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 180 treesize of output 164 [2021-10-13 07:08:29,239 INFO L354 Elim1Store]: treesize reduction 45, result has 8.2 percent of original size [2021-10-13 07:08:29,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 157 treesize of output 83 [2021-10-13 07:08:29,278 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-10-13 07:08:29,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 37 [2021-10-13 07:08:29,344 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 07:08:29,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:29,575 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 07:08:29,576 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:08:29,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229755802] [2021-10-13 07:08:29,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229755802] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:08:29,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:08:29,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-13 07:08:29,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576048505] [2021-10-13 07:08:29,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 07:08:29,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:08:29,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 07:08:29,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:08:29,588 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 07:08:32,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:08:32,661 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2021-10-13 07:08:32,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:08:32,662 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 07:08:32,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:08:32,665 INFO L225 Difference]: With dead ends: 61 [2021-10-13 07:08:32,665 INFO L226 Difference]: Without dead ends: 50 [2021-10-13 07:08:32,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 803.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-10-13 07:08:32,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-13 07:08:32,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2021-10-13 07:08:32,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 46 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 07:08:32,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-10-13 07:08:32,675 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 9 [2021-10-13 07:08:32,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:08:32,675 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-10-13 07:08:32,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 07:08:32,676 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-10-13 07:08:32,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 07:08:32,676 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:08:32,676 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:08:32,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-13 07:08:32,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:08:32,891 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 07:08:32,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:08:32,892 INFO L82 PathProgramCache]: Analyzing trace with hash 589814998, now seen corresponding path program 1 times [2021-10-13 07:08:32,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:08:32,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416000949] [2021-10-13 07:08:32,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:32,892 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:08:32,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:08:32,893 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:08:32,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 07:08:33,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:33,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:08:33,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:33,053 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 07:08:33,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:33,092 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 07:08:33,092 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:08:33,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416000949] [2021-10-13 07:08:33,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416000949] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:08:33,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:08:33,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:08:33,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134795388] [2021-10-13 07:08:33,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:08:33,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:08:33,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:08:33,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:08:33,096 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:08:35,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:08:35,183 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2021-10-13 07:08:35,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:08:35,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 07:08:35,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:08:35,185 INFO L225 Difference]: With dead ends: 48 [2021-10-13 07:08:35,185 INFO L226 Difference]: Without dead ends: 46 [2021-10-13 07:08:35,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:08:35,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-13 07:08:35,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-10-13 07:08:35,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 43 states have (on average 1.255813953488372) internal successors, (54), 44 states have internal predecessors, (54), 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 07:08:35,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2021-10-13 07:08:35,195 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 9 [2021-10-13 07:08:35,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:08:35,195 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2021-10-13 07:08:35,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:08:35,196 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2021-10-13 07:08:35,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 07:08:35,197 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:08:35,197 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:08:35,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-10-13 07:08:35,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:08:35,412 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 07:08:35,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:08:35,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2092073026, now seen corresponding path program 1 times [2021-10-13 07:08:35,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:08:35,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1767645634] [2021-10-13 07:08:35,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:35,414 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:08:35,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:08:35,415 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:08:35,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:08:35,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:35,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:08:35,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:35,651 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:35,654 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 154 [2021-10-13 07:08:35,947 INFO L354 Elim1Store]: treesize reduction 499, result has 7.1 percent of original size [2021-10-13 07:08:35,948 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 5 case distinctions, treesize of input 154 treesize of output 92 [2021-10-13 07:08:36,209 INFO L354 Elim1Store]: treesize reduction 330, result has 10.8 percent of original size [2021-10-13 07:08:36,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 123 treesize of output 97 [2021-10-13 07:08:36,290 INFO L354 Elim1Store]: treesize reduction 119, result has 14.4 percent of original size [2021-10-13 07:08:36,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 146 treesize of output 138 [2021-10-13 07:08:36,766 INFO L354 Elim1Store]: treesize reduction 336, result has 12.3 percent of original size [2021-10-13 07:08:36,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 149 treesize of output 117 [2021-10-13 07:08:36,838 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-10-13 07:08:36,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 145 treesize of output 149 [2021-10-13 07:08:37,368 INFO L354 Elim1Store]: treesize reduction 498, result has 9.8 percent of original size [2021-10-13 07:08:37,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 147 treesize of output 103 [2021-10-13 07:08:38,767 INFO L354 Elim1Store]: treesize reduction 256, result has 0.4 percent of original size [2021-10-13 07:08:38,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 135 treesize of output 53 [2021-10-13 07:08:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:38,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:38,988 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:38,989 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-10-13 07:08:41,137 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~item~0.offset_26 (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32)) (v_ULTIMATE.start_main_~item~0.base_26 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~item~0.base_26)))) (not (= (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_26 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_26) v_ULTIMATE.start_main_~item~0.offset_26 (_ bv0 32)) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~item~0.offset_26) v_DerPreprocessor_2)) c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset) (_ bv0 32))))) is different from false [2021-10-13 07:08:41,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:41,186 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:08:41,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1767645634] [2021-10-13 07:08:41,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1767645634] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:08:41,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1466683340] [2021-10-13 07:08:41,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:41,187 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:08:41,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:08:41,193 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:08:41,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-13 07:08:41,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:41,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 07:08:41,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:41,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:41,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:41,501 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 132 treesize of output 107 [2021-10-13 07:08:41,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:08:41,563 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-10-13 07:08:41,564 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 132 treesize of output 90 [2021-10-13 07:08:41,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:08:41,656 INFO L354 Elim1Store]: treesize reduction 82, result has 27.4 percent of original size [2021-10-13 07:08:41,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 122 treesize of output 96 [2021-10-13 07:08:41,714 INFO L354 Elim1Store]: treesize reduction 119, result has 14.4 percent of original size [2021-10-13 07:08:41,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 145 treesize of output 137 [2021-10-13 07:08:41,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:41,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:08:42,082 INFO L354 Elim1Store]: treesize reduction 198, result has 18.5 percent of original size [2021-10-13 07:08:42,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 111 treesize of output 103 [2021-10-13 07:08:42,140 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-10-13 07:08:42,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 107 treesize of output 111 [2021-10-13 07:08:42,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:42,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:08:42,592 INFO L354 Elim1Store]: treesize reduction 358, result has 12.7 percent of original size [2021-10-13 07:08:42,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 89 [2021-10-13 07:08:43,634 INFO L354 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2021-10-13 07:08:43,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 95 treesize of output 53 [2021-10-13 07:08:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:43,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:43,716 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:43,717 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-10-13 07:08:45,826 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~item~0.offset_28 (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32)) (v_ULTIMATE.start_main_~item~0.base_28 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~item~0.base_28)))) (not (= (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_28 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_28) v_ULTIMATE.start_main_~item~0.offset_28 (_ bv0 32)) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~item~0.offset_28) v_DerPreprocessor_2)) c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset) (_ bv0 32))))) is different from false [2021-10-13 07:08:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:45,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1466683340] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:08:45,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721588631] [2021-10-13 07:08:45,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:45,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:08:45,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:08:45,880 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:08:45,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 07:08:46,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:46,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:08:46,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:46,116 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:46,117 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 153 [2021-10-13 07:08:46,395 INFO L354 Elim1Store]: treesize reduction 499, result has 7.1 percent of original size [2021-10-13 07:08:46,396 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 5 case distinctions, treesize of input 153 treesize of output 91 [2021-10-13 07:08:46,606 INFO L354 Elim1Store]: treesize reduction 330, result has 10.8 percent of original size [2021-10-13 07:08:46,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 122 treesize of output 96 [2021-10-13 07:08:46,658 INFO L354 Elim1Store]: treesize reduction 119, result has 14.4 percent of original size [2021-10-13 07:08:46,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 145 treesize of output 137 [2021-10-13 07:08:46,938 INFO L354 Elim1Store]: treesize reduction 336, result has 12.3 percent of original size [2021-10-13 07:08:46,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 150 treesize of output 118 [2021-10-13 07:08:47,015 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-10-13 07:08:47,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 146 treesize of output 150 [2021-10-13 07:08:47,346 INFO L354 Elim1Store]: treesize reduction 498, result has 9.8 percent of original size [2021-10-13 07:08:47,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 147 treesize of output 103 [2021-10-13 07:08:48,294 INFO L354 Elim1Store]: treesize reduction 256, result has 0.4 percent of original size [2021-10-13 07:08:48,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 135 treesize of output 53 [2021-10-13 07:08:48,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:48,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:48,385 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:48,386 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-10-13 07:08:50,474 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~item~0.base_30 (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32)) (v_ULTIMATE.start_main_~item~0.offset_30 (_ BitVec 32))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_30 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_30) v_ULTIMATE.start_main_~item~0.offset_30 (_ bv0 32)) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~item~0.offset_30) v_DerPreprocessor_2)) c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset) (_ bv0 32))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~item~0.base_30)))))) is different from false [2021-10-13 07:08:50,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:50,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721588631] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:08:50,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:08:50,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 17 [2021-10-13 07:08:50,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430364029] [2021-10-13 07:08:50,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 07:08:50,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:08:50,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 07:08:50,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=142, Unknown=3, NotChecked=78, Total=272 [2021-10-13 07:08:50,521 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:10:04,999 WARN L207 SmtUtils]: Spent 58.33 s on a formula simplification. DAG size of input: 103 DAG size of output: 63 [2021-10-13 07:10:21,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:10:21,788 INFO L93 Difference]: Finished difference Result 112 states and 138 transitions. [2021-10-13 07:10:21,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 07:10:21,792 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 07:10:21,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:10:21,794 INFO L225 Difference]: With dead ends: 112 [2021-10-13 07:10:21,794 INFO L226 Difference]: Without dead ends: 110 [2021-10-13 07:10:21,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 76331.4ms TimeCoverageRelationStatistics Valid=105, Invalid=279, Unknown=8, NotChecked=114, Total=506 [2021-10-13 07:10:21,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-13 07:10:21,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 54. [2021-10-13 07:10:21,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 53 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:10:21,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2021-10-13 07:10:21,809 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 15 [2021-10-13 07:10:21,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:10:21,810 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2021-10-13 07:10:21,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:10:21,810 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2021-10-13 07:10:21,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 07:10:21,811 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:10:21,811 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:10:21,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:10:22,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:10:22,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:10:22,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:10:22,417 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 07:10:22,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:10:22,417 INFO L82 PathProgramCache]: Analyzing trace with hash 438935047, now seen corresponding path program 2 times [2021-10-13 07:10:22,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:10:22,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1928379769] [2021-10-13 07:10:22,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:10:22,418 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:10:22,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:10:22,419 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:10:22,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 07:10:22,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:10:22,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:10:22,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 07:10:22,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:10:23,608 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-13 07:10:23,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 148 treesize of output 151 [2021-10-13 07:10:23,809 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-10-13 07:10:23,809 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 143 treesize of output 128 [2021-10-13 07:10:23,813 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:10:23,814 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 129 [2021-10-13 07:10:24,023 INFO L354 Elim1Store]: treesize reduction 169, result has 9.1 percent of original size [2021-10-13 07:10:24,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 129 treesize of output 112 [2021-10-13 07:10:24,037 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:10:24,039 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-10-13 07:10:24,254 INFO L354 Elim1Store]: treesize reduction 321, result has 9.3 percent of original size [2021-10-13 07:10:24,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 103 treesize of output 85 [2021-10-13 07:10:24,368 INFO L354 Elim1Store]: treesize reduction 132, result has 16.5 percent of original size [2021-10-13 07:10:24,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 66 [2021-10-13 07:10:24,370 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 07:10:24,746 INFO L354 Elim1Store]: treesize reduction 140, result has 15.7 percent of original size [2021-10-13 07:10:24,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 83 [2021-10-13 07:10:24,825 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-10-13 07:10:24,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 78 [2021-10-13 07:10:25,167 INFO L354 Elim1Store]: treesize reduction 106, result has 13.8 percent of original size [2021-10-13 07:10:25,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 64 [2021-10-13 07:10:26,564 INFO L354 Elim1Store]: treesize reduction 90, result has 1.1 percent of original size [2021-10-13 07:10:26,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 43 [2021-10-13 07:10:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:10:26,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:10:26,877 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:10:26,878 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-10-13 07:10:28,912 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~item~0.base_32 (_ BitVec 32)) (v_ULTIMATE.start_main_~item~0.offset_32 (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~item~0.base_32)))) (= (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_32 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_32) v_ULTIMATE.start_main_~item~0.offset_32 v_DerPreprocessor_8) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~item~0.offset_32) (_ bv0 32))) c_ULTIMATE.start_main_~bucket~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~bucket~0.offset)) (_ bv0 32)))) is different from false [2021-10-13 07:10:28,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:10:28,966 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:10:28,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1928379769] [2021-10-13 07:10:28,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1928379769] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:10:28,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:10:28,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-10-13 07:10:28,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078285748] [2021-10-13 07:10:28,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 07:10:28,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:10:28,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 07:10:28,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=85, Unknown=1, NotChecked=18, Total=132 [2021-10-13 07:10:28,968 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 07:10:50,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:10:50,080 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2021-10-13 07:10:50,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 07:10:50,081 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 17 [2021-10-13 07:10:50,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:10:50,082 INFO L225 Difference]: With dead ends: 118 [2021-10-13 07:10:50,082 INFO L226 Difference]: Without dead ends: 84 [2021-10-13 07:10:50,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2796.6ms TimeCoverageRelationStatistics Valid=58, Invalid=155, Unknown=1, NotChecked=26, Total=240 [2021-10-13 07:10:50,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-13 07:10:50,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 61. [2021-10-13 07:10:50,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 60 states have internal predecessors, (73), 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 07:10:50,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2021-10-13 07:10:50,095 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 17 [2021-10-13 07:10:50,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:10:50,095 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2021-10-13 07:10:50,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 07:10:50,096 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2021-10-13 07:10:50,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 07:10:50,097 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:10:50,097 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:10:50,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:10:50,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:10:50,300 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 07:10:50,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:10:50,300 INFO L82 PathProgramCache]: Analyzing trace with hash -581654046, now seen corresponding path program 1 times [2021-10-13 07:10:50,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:10:50,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1231499860] [2021-10-13 07:10:50,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:10:50,301 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:10:50,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:10:50,302 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:10:50,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 07:10:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:10:50,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 07:10:50,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:10:59,841 WARN L207 SmtUtils]: Spent 9.17 s on a formula simplification. DAG size of input: 25 DAG size of output: 9 [2021-10-13 07:10:59,841 INFO L354 Elim1Store]: treesize reduction 47, result has 25.4 percent of original size [2021-10-13 07:10:59,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 239 treesize of output 243 [2021-10-13 07:11:02,943 INFO L354 Elim1Store]: treesize reduction 92, result has 15.6 percent of original size [2021-10-13 07:11:02,944 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 2 case distinctions, treesize of input 233 treesize of output 208 [2021-10-13 07:11:06,104 INFO L354 Elim1Store]: treesize reduction 312, result has 9.0 percent of original size [2021-10-13 07:11:06,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 257 treesize of output 187 [2021-10-13 07:11:08,377 INFO L354 Elim1Store]: treesize reduction 330, result has 10.8 percent of original size [2021-10-13 07:11:08,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 299 treesize of output 193 [2021-10-13 07:11:08,383 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:11:08,385 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 261 [2021-10-13 07:11:08,389 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:11:08,390 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 266 [2021-10-13 07:11:08,391 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 07:11:08,796 INFO L354 Elim1Store]: treesize reduction 1834, result has 4.4 percent of original size [2021-10-13 07:11:08,796 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 7 case distinctions, treesize of input 266 treesize of output 231 [2021-10-13 07:11:09,275 INFO L354 Elim1Store]: treesize reduction 336, result has 12.3 percent of original size [2021-10-13 07:11:09,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 234 treesize of output 174 [2021-10-13 07:11:09,504 INFO L354 Elim1Store]: treesize reduction 504, result has 12.3 percent of original size [2021-10-13 07:11:09,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 230 treesize of output 244 [2021-10-13 07:11:09,565 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-10-13 07:11:09,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 226 treesize of output 230 [2021-10-13 07:11:10,305 INFO L354 Elim1Store]: treesize reduction 498, result has 9.8 percent of original size [2021-10-13 07:11:10,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 247 treesize of output 175 [2021-10-13 07:11:10,564 INFO L354 Elim1Store]: treesize reduction 690, result has 10.2 percent of original size [2021-10-13 07:11:10,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 228 treesize of output 230 [2021-10-13 07:11:12,343 INFO L354 Elim1Store]: treesize reduction 376, result has 0.3 percent of original size [2021-10-13 07:11:12,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 223 treesize of output 163 [2021-10-13 07:11:13,501 INFO L354 Elim1Store]: treesize reduction 256, result has 0.4 percent of original size [2021-10-13 07:11:13,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 143 treesize of output 53 [2021-10-13 07:11:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:11:13,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:11:13,769 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:11:13,770 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-10-13 07:11:13,773 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:11:13,774 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-10-13 07:11:17,975 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~item~0.base_34 (_ BitVec 32)) (v_DerPreprocessor_11 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32)) (v_ULTIMATE.start_main_~item~0.offset_34 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~item~0.base_34))))))))) (not (= (let ((.cse1 (bvadd (_ bv4 32) v_ULTIMATE.start_main_~item~0.offset_34))) (select (let ((.cse0 (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_34 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_34) v_ULTIMATE.start_main_~item~0.offset_34 (_ bv0 32)) .cse1 v_DerPreprocessor_11)))) (select .cse0 (select (select .cse0 c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset))) (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_34 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_34) v_ULTIMATE.start_main_~item~0.offset_34 (_ bv0 32)) .cse1 v_DerPreprocessor_12)) c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset))) (_ bv0 32))))) is different from false [2021-10-13 07:11:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:11:18,037 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:11:18,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1231499860] [2021-10-13 07:11:18,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1231499860] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:11:18,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [129468590] [2021-10-13 07:11:18,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:11:18,038 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:11:18,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:11:18,039 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:11:18,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-13 07:11:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:11:18,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 07:11:18,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:11:18,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:11:18,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:11:18,585 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 223 treesize of output 198 [2021-10-13 07:11:21,838 INFO L354 Elim1Store]: treesize reduction 47, result has 25.4 percent of original size [2021-10-13 07:11:21,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 201 treesize of output 205 [2021-10-13 07:11:21,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:11:21,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:11:21,857 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 196 treesize of output 171 [2021-10-13 07:11:21,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:11:22,133 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-10-13 07:11:22,133 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 154 [2021-10-13 07:11:22,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:11:22,374 INFO L354 Elim1Store]: treesize reduction 82, result has 27.4 percent of original size [2021-10-13 07:11:22,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 254 treesize of output 160 [2021-10-13 07:11:22,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:11:22,440 INFO L354 Elim1Store]: treesize reduction 50, result has 25.4 percent of original size [2021-10-13 07:11:22,440 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 3 case distinctions, treesize of input 254 treesize of output 205 [2021-10-13 07:11:22,441 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 07:11:22,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:11:22,510 INFO L354 Elim1Store]: treesize reduction 178, result has 18.0 percent of original size [2021-10-13 07:11:22,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 199 treesize of output 211 [2021-10-13 07:11:22,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:11:22,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:11:22,917 INFO L354 Elim1Store]: treesize reduction 96, result has 18.6 percent of original size [2021-10-13 07:11:22,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 210 treesize of output 166 [2021-10-13 07:11:22,960 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-13 07:11:22,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 206 treesize of output 202 [2021-10-13 07:11:22,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:11:22,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:11:23,043 INFO L354 Elim1Store]: treesize reduction 180, result has 15.9 percent of original size [2021-10-13 07:11:23,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 177 treesize of output 191 [2021-10-13 07:11:23,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:11:23,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:11:23,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:11:23,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:11:23,544 INFO L354 Elim1Store]: treesize reduction 108, result has 12.2 percent of original size [2021-10-13 07:11:23,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 20 case distinctions, treesize of input 207 treesize of output 155 [2021-10-13 07:11:23,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:11:23,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:11:23,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:11:23,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:11:23,634 INFO L354 Elim1Store]: treesize reduction 204, result has 11.7 percent of original size [2021-10-13 07:11:23,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 188 treesize of output 190 [2021-10-13 07:11:23,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 07:11:25,055 INFO L354 Elim1Store]: treesize reduction 132, result has 0.8 percent of original size [2021-10-13 07:11:25,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 176 treesize of output 120 [2021-10-13 07:11:25,731 INFO L354 Elim1Store]: treesize reduction 60, result has 17.8 percent of original size [2021-10-13 07:11:25,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 125 treesize of output 67 [2021-10-13 07:11:25,900 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-10-13 07:11:25,900 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 3 case distinctions, treesize of input 48 treesize of output 26 [2021-10-13 07:11:25,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:11:25,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:11:29,019 INFO L354 Elim1Store]: treesize reduction 6, result has 71.4 percent of original size [2021-10-13 07:11:29,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 142 [2021-10-13 07:11:29,028 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:11:29,030 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-10-13 07:11:29,033 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:11:29,039 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 141 [2021-10-13 07:11:35,607 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_13 (_ BitVec 32)) (v_ULTIMATE.start_main_~item~0.base_36 (_ BitVec 32)) (v_DerPreprocessor_14 (_ BitVec 32))) (let ((.cse2 (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_36 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_36) (_ bv0 32) (_ bv0 32)) (_ bv4 32) v_DerPreprocessor_13)))) (let ((.cse1 (select (select .cse2 c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset)) (.cse0 (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_36 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_36) (_ bv0 32) (_ bv0 32)) (_ bv4 32) v_DerPreprocessor_14)) c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset))) (or (and (= (bvadd (_ bv4 32) .cse0) (_ bv0 32)) (= .cse1 v_ULTIMATE.start_main_~item~0.base_36)) (and (= .cse1 (_ bv0 32)) (= .cse0 (_ bv0 32))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~item~0.base_36))))) (not (= (_ bv0 32) (select (select .cse2 .cse1) .cse0))))))) is different from false [2021-10-13 07:11:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:11:35,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [129468590] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:11:35,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92454774] [2021-10-13 07:11:35,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:11:35,686 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:11:35,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:11:35,699 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:11:35,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 07:11:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:11:36,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 07:11:36,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:11:38,792 INFO L354 Elim1Store]: treesize reduction 92, result has 15.6 percent of original size [2021-10-13 07:11:38,792 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 2 case distinctions, treesize of input 237 treesize of output 212 [2021-10-13 07:11:41,836 INFO L354 Elim1Store]: treesize reduction 312, result has 9.0 percent of original size [2021-10-13 07:11:41,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 261 treesize of output 191 [2021-10-13 07:11:43,743 INFO L354 Elim1Store]: treesize reduction 330, result has 10.8 percent of original size [2021-10-13 07:11:43,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 295 treesize of output 197 [2021-10-13 07:11:43,747 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:11:43,748 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 257 [2021-10-13 07:11:43,752 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:11:43,754 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 262 [2021-10-13 07:11:44,213 INFO L354 Elim1Store]: treesize reduction 1834, result has 4.4 percent of original size [2021-10-13 07:11:44,214 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 7 case distinctions, treesize of input 262 treesize of output 227 [2021-10-13 07:11:44,216 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 07:11:44,277 INFO L354 Elim1Store]: treesize reduction 119, result has 14.4 percent of original size [2021-10-13 07:11:44,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 222 treesize of output 214 [2021-10-13 07:11:44,664 INFO L354 Elim1Store]: treesize reduction 336, result has 12.3 percent of original size [2021-10-13 07:11:44,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 236 treesize of output 176 [2021-10-13 07:11:44,856 INFO L354 Elim1Store]: treesize reduction 504, result has 12.3 percent of original size [2021-10-13 07:11:44,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 232 treesize of output 246 [2021-10-13 07:11:44,922 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-10-13 07:11:44,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 228 treesize of output 232 [2021-10-13 07:11:45,535 INFO L354 Elim1Store]: treesize reduction 498, result has 9.8 percent of original size [2021-10-13 07:11:45,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 247 treesize of output 175 [2021-10-13 07:11:45,738 INFO L354 Elim1Store]: treesize reduction 690, result has 10.2 percent of original size [2021-10-13 07:11:45,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 228 treesize of output 230 [2021-10-13 07:11:47,168 INFO L354 Elim1Store]: treesize reduction 376, result has 0.3 percent of original size [2021-10-13 07:11:47,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 223 treesize of output 163 [2021-10-13 07:11:48,326 INFO L354 Elim1Store]: treesize reduction 256, result has 0.4 percent of original size [2021-10-13 07:11:48,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 143 treesize of output 53 [2021-10-13 07:11:48,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:11:48,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:11:48,418 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:11:48,419 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-10-13 07:11:48,423 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:11:48,424 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-10-13 07:11:52,949 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~item~0.offset_38 (_ BitVec 32)) (v_DerPreprocessor_11 (_ BitVec 32)) (v_ULTIMATE.start_main_~item~0.base_38 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~item~0.base_38)))) (not (= (let ((.cse1 (bvadd (_ bv4 32) v_ULTIMATE.start_main_~item~0.offset_38))) (select (let ((.cse0 (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_38 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_38) v_ULTIMATE.start_main_~item~0.offset_38 (_ bv0 32)) .cse1 v_DerPreprocessor_11)))) (select .cse0 (select (select .cse0 c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset))) (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_38 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_38) v_ULTIMATE.start_main_~item~0.offset_38 (_ bv0 32)) .cse1 v_DerPreprocessor_12)) c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset))) (_ bv0 32))))) is different from false [2021-10-13 07:11:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:11:52,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92454774] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:11:52,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:11:52,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11, 11, 8, 8] total 31 [2021-10-13 07:11:52,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888035655] [2021-10-13 07:11:52,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 07:11:52,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:11:52,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 07:11:52,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=644, Unknown=9, NotChecked=162, Total=930 [2021-10-13 07:11:52,999 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 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 07:13:39,413 WARN L207 SmtUtils]: Spent 1.10 m on a formula simplification. DAG size of input: 188 DAG size of output: 98 [2021-10-13 07:14:13,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:14:13,008 INFO L93 Difference]: Finished difference Result 145 states and 185 transitions. [2021-10-13 07:14:13,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 07:14:13,009 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 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 07:14:13,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:14:13,011 INFO L225 Difference]: With dead ends: 145 [2021-10-13 07:14:13,011 INFO L226 Difference]: Without dead ends: 143 [2021-10-13 07:14:13,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 120492.2ms TimeCoverageRelationStatistics Valid=427, Invalid=2117, Unknown=18, NotChecked=300, Total=2862 [2021-10-13 07:14:13,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-10-13 07:14:13,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 63. [2021-10-13 07:14:13,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 62 states have internal predecessors, (76), 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 07:14:13,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-10-13 07:14:13,025 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 18 [2021-10-13 07:14:13,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:14:13,026 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-10-13 07:14:13,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 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 07:14:13,026 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-10-13 07:14:13,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 07:14:13,027 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:14:13,028 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:14:13,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:14:13,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:14:13,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:14:13,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:14:13,631 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 07:14:13,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:14:13,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1938687340, now seen corresponding path program 1 times [2021-10-13 07:14:13,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:14:13,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [907871027] [2021-10-13 07:14:13,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:13,632 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:14:13,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:14:13,633 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:14:13,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 07:14:14,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:14,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 07:14:14,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:14:17,473 INFO L354 Elim1Store]: treesize reduction 92, result has 15.6 percent of original size [2021-10-13 07:14:17,473 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 2 case distinctions, treesize of input 208 treesize of output 183 [2021-10-13 07:14:19,064 INFO L354 Elim1Store]: treesize reduction 92, result has 15.6 percent of original size [2021-10-13 07:14:19,064 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 2 case distinctions, treesize of input 183 treesize of output 158 [2021-10-13 07:14:19,641 INFO L354 Elim1Store]: treesize reduction 224, result has 7.1 percent of original size [2021-10-13 07:14:19,642 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 191 treesize of output 141 [2021-10-13 07:14:19,959 INFO L354 Elim1Store]: treesize reduction 216, result has 12.6 percent of original size [2021-10-13 07:14:19,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 213 treesize of output 147 [2021-10-13 07:14:20,065 INFO L354 Elim1Store]: treesize reduction 344, result has 4.7 percent of original size [2021-10-13 07:14:20,065 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 3 case distinctions, treesize of input 213 treesize of output 164 [2021-10-13 07:14:20,180 INFO L354 Elim1Store]: treesize reduction 368, result has 9.6 percent of original size [2021-10-13 07:14:20,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 158 treesize of output 170 [2021-10-13 07:14:20,181 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 07:14:20,188 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-10-13 07:14:20,188 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 181 treesize of output 165 [2021-10-13 07:14:20,798 INFO L354 Elim1Store]: treesize reduction 262, result has 12.1 percent of original size [2021-10-13 07:14:20,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 20 case distinctions, treesize of input 181 treesize of output 132 [2021-10-13 07:14:20,965 INFO L354 Elim1Store]: treesize reduction 406, result has 12.9 percent of original size [2021-10-13 07:14:20,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 168 treesize of output 173 [2021-10-13 07:14:21,711 INFO L354 Elim1Store]: treesize reduction 311, result has 10.9 percent of original size [2021-10-13 07:14:21,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 195 treesize of output 144 [2021-10-13 07:14:21,861 INFO L354 Elim1Store]: treesize reduction 343, result has 11.8 percent of original size [2021-10-13 07:14:21,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 140 treesize of output 143 [2021-10-13 07:14:22,882 INFO L354 Elim1Store]: treesize reduction 304, result has 2.3 percent of original size [2021-10-13 07:14:22,883 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 12 new quantified variables, introduced 28 case distinctions, treesize of input 221 treesize of output 117 [2021-10-13 07:14:22,984 INFO L354 Elim1Store]: treesize reduction 268, result has 2.5 percent of original size [2021-10-13 07:14:22,985 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 10 new quantified variables, introduced 28 case distinctions, treesize of input 77 treesize of output 51 [2021-10-13 07:14:23,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:23,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:14:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:26,636 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:14:26,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [907871027] [2021-10-13 07:14:26,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [907871027] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:14:26,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [267754549] [2021-10-13 07:14:26,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:26,636 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:14:26,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:14:26,637 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:14:26,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-10-13 07:14:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:27,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 07:14:27,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:14:27,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:14:27,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:14:27,435 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 209 treesize of output 184 [2021-10-13 07:14:27,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:14:27,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:14:27,445 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 184 treesize of output 159 [2021-10-13 07:14:27,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:14:27,718 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-10-13 07:14:27,719 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 192 treesize of output 142 [2021-10-13 07:14:27,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:14:27,982 INFO L354 Elim1Store]: treesize reduction 82, result has 27.4 percent of original size [2021-10-13 07:14:27,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 214 treesize of output 148 [2021-10-13 07:14:27,993 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:14:27,994 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 178 [2021-10-13 07:14:28,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:14:28,107 INFO L354 Elim1Store]: treesize reduction 224, result has 14.8 percent of original size [2021-10-13 07:14:28,107 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 5 case distinctions, treesize of input 178 treesize of output 180 [2021-10-13 07:14:28,109 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 07:14:28,117 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-10-13 07:14:28,117 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 182 treesize of output 166 [2021-10-13 07:14:28,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:14:28,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:14:28,771 INFO L354 Elim1Store]: treesize reduction 164, result has 14.1 percent of original size [2021-10-13 07:14:28,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 169 treesize of output 183 [2021-10-13 07:14:28,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:14:28,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:14:28,824 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-10-13 07:14:28,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 17 case distinctions, treesize of input 165 treesize of output 129 [2021-10-13 07:14:29,786 INFO L354 Elim1Store]: treesize reduction 347, result has 13.9 percent of original size [2021-10-13 07:14:29,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 183 treesize of output 182 [2021-10-13 07:14:29,895 INFO L354 Elim1Store]: treesize reduction 223, result has 13.9 percent of original size [2021-10-13 07:14:29,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 164 treesize of output 121 [2021-10-13 07:14:30,821 INFO L354 Elim1Store]: treesize reduction 214, result has 4.9 percent of original size [2021-10-13 07:14:30,821 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 12 new quantified variables, introduced 28 case distinctions, treesize of input 209 treesize of output 115 [2021-10-13 07:14:30,892 INFO L354 Elim1Store]: treesize reduction 182, result has 3.7 percent of original size [2021-10-13 07:14:30,893 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 10 new quantified variables, introduced 28 case distinctions, treesize of input 75 treesize of output 51 [2021-10-13 07:14:30,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:30,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:14:31,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:31,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [267754549] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:14:31,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693050129] [2021-10-13 07:14:31,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:31,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:14:31,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:14:31,307 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:14:31,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-13 07:14:31,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:31,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 07:14:31,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:14:35,812 INFO L354 Elim1Store]: treesize reduction 92, result has 15.6 percent of original size [2021-10-13 07:14:35,813 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 2 case distinctions, treesize of input 207 treesize of output 182 [2021-10-13 07:14:37,633 INFO L354 Elim1Store]: treesize reduction 224, result has 7.1 percent of original size [2021-10-13 07:14:37,634 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 227 treesize of output 165 [2021-10-13 07:14:39,194 INFO L354 Elim1Store]: treesize reduction 216, result has 12.6 percent of original size [2021-10-13 07:14:39,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 249 treesize of output 171 [2021-10-13 07:14:39,199 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:14:39,200 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 254 [2021-10-13 07:14:39,364 INFO L354 Elim1Store]: treesize reduction 615, result has 4.4 percent of original size [2021-10-13 07:14:39,364 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 3 case distinctions, treesize of input 254 treesize of output 168 [2021-10-13 07:14:39,488 INFO L354 Elim1Store]: treesize reduction 368, result has 9.6 percent of original size [2021-10-13 07:14:39,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 157 treesize of output 169 [2021-10-13 07:14:39,489 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 07:14:39,496 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-10-13 07:14:39,496 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 180 treesize of output 164 [2021-10-13 07:14:39,953 INFO L354 Elim1Store]: treesize reduction 262, result has 12.1 percent of original size [2021-10-13 07:14:39,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 20 case distinctions, treesize of input 181 treesize of output 132 [2021-10-13 07:14:40,070 INFO L354 Elim1Store]: treesize reduction 406, result has 12.9 percent of original size [2021-10-13 07:14:40,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 168 treesize of output 173 [2021-10-13 07:14:40,864 INFO L354 Elim1Store]: treesize reduction 311, result has 10.9 percent of original size [2021-10-13 07:14:40,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 195 treesize of output 144 [2021-10-13 07:14:40,995 INFO L354 Elim1Store]: treesize reduction 343, result has 11.8 percent of original size [2021-10-13 07:14:40,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 140 treesize of output 143 [2021-10-13 07:14:41,855 INFO L354 Elim1Store]: treesize reduction 304, result has 2.3 percent of original size [2021-10-13 07:14:41,856 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 12 new quantified variables, introduced 28 case distinctions, treesize of input 221 treesize of output 117 [2021-10-13 07:14:41,936 INFO L354 Elim1Store]: treesize reduction 268, result has 2.5 percent of original size [2021-10-13 07:14:41,937 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 10 new quantified variables, introduced 28 case distinctions, treesize of input 77 treesize of output 51 [2021-10-13 07:14:41,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:41,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:14:42,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:42,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693050129] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:14:42,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:14:42,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7, 9, 7, 9] total 17 [2021-10-13 07:14:42,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339266752] [2021-10-13 07:14:42,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 07:14:42,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:14:42,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 07:14:42,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-10-13 07:14:42,387 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 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 07:15:20,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:20,508 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2021-10-13 07:15:20,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 07:15:20,508 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 07:15:20,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:20,509 INFO L225 Difference]: With dead ends: 83 [2021-10-13 07:15:20,509 INFO L226 Difference]: Without dead ends: 72 [2021-10-13 07:15:20,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 4763.7ms TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-10-13 07:15:20,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-13 07:15:20,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2021-10-13 07:15:20,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 67 states have internal predecessors, (81), 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 07:15:20,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2021-10-13 07:15:20,521 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 19 [2021-10-13 07:15:20,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:20,522 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2021-10-13 07:15:20,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 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 07:15:20,522 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2021-10-13 07:15:20,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 07:15:20,523 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:20,523 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:15:20,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-13 07:15:20,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-10-13 07:15:20,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-10-13 07:15:21,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:15:21,128 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 07:15:21,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:21,128 INFO L82 PathProgramCache]: Analyzing trace with hash -622338137, now seen corresponding path program 2 times [2021-10-13 07:15:21,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:15:21,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980259690] [2021-10-13 07:15:21,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:15:21,129 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:15:21,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:15:21,130 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:15:21,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 07:15:21,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:15:21,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:15:21,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-13 07:15:21,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:15:21,977 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:15:21,978 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 320 [2021-10-13 07:15:21,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:15:21,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:15:21,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:15:40,544 WARN L207 SmtUtils]: Spent 18.56 s on a formula simplification. DAG size of input: 66 DAG size of output: 23 [2021-10-13 07:15:40,545 INFO L354 Elim1Store]: treesize reduction 228, result has 14.3 percent of original size [2021-10-13 07:15:40,545 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 5 case distinctions, treesize of input 320 treesize of output 258 [2021-10-13 07:15:40,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:15:40,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:15:52,026 WARN L207 SmtUtils]: Spent 11.47 s on a formula simplification. DAG size of input: 82 DAG size of output: 28 [2021-10-13 07:15:52,027 INFO L354 Elim1Store]: treesize reduction 284, result has 12.3 percent of original size [2021-10-13 07:15:52,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 425 treesize of output 263 [2021-10-13 07:15:52,033 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:15:52,034 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 430 [2021-10-13 07:15:52,040 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:15:52,041 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 412 [2021-10-13 07:15:55,070 INFO L354 Elim1Store]: treesize reduction 486, result has 9.5 percent of original size [2021-10-13 07:15:55,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 412 treesize of output 370 [2021-10-13 07:15:55,075 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:15:55,076 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 310 [2021-10-13 07:15:55,076 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 07:15:55,083 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:15:55,084 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 315 [2021-10-13 07:15:55,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:15:55,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:15:55,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:15:55,536 INFO L354 Elim1Store]: treesize reduction 1283, result has 6.1 percent of original size [2021-10-13 07:15:55,536 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 7 case distinctions, treesize of input 315 treesize of output 280 [2021-10-13 07:15:55,597 INFO L354 Elim1Store]: treesize reduction 132, result has 18.0 percent of original size [2021-10-13 07:15:55,598 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 3 case distinctions, treesize of input 252 treesize of output 219 [2021-10-13 07:15:55,661 INFO L354 Elim1Store]: treesize reduction 119, result has 14.4 percent of original size [2021-10-13 07:15:55,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 236 treesize of output 228 [2021-10-13 07:15:55,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:15:55,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:15:56,214 INFO L354 Elim1Store]: treesize reduction 290, result has 13.9 percent of original size [2021-10-13 07:15:56,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 259 treesize of output 199 [2021-10-13 07:15:56,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:15:56,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:15:56,456 INFO L354 Elim1Store]: treesize reduction 450, result has 13.6 percent of original size [2021-10-13 07:15:56,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 255 treesize of output 269 [2021-10-13 07:15:56,529 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-10-13 07:15:56,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 251 treesize of output 255 [2021-10-13 07:15:56,604 INFO L354 Elim1Store]: treesize reduction 124, result has 19.0 percent of original size [2021-10-13 07:15:56,605 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 3 case distinctions, treesize of input 232 treesize of output 223 [2021-10-13 07:15:56,607 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 07:15:57,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:15:57,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:15:57,438 INFO L354 Elim1Store]: treesize reduction 352, result has 9.7 percent of original size [2021-10-13 07:15:57,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 23 case distinctions, treesize of input 264 treesize of output 192 [2021-10-13 07:15:57,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:15:57,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:15:57,675 INFO L354 Elim1Store]: treesize reduction 536, result has 10.4 percent of original size [2021-10-13 07:15:57,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 23 case distinctions, treesize of input 245 treesize of output 247 [2021-10-13 07:15:57,754 INFO L354 Elim1Store]: treesize reduction 124, result has 19.0 percent of original size [2021-10-13 07:15:57,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 226 treesize of output 228 [2021-10-13 07:15:59,979 INFO L354 Elim1Store]: treesize reduction 201, result has 2.0 percent of original size [2021-10-13 07:15:59,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 227 treesize of output 123 [2021-10-13 07:16:00,063 INFO L354 Elim1Store]: treesize reduction 204, result has 0.5 percent of original size [2021-10-13 07:16:00,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 99 treesize of output 65 [2021-10-13 07:16:00,258 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-10-13 07:16:00,258 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 28 [2021-10-13 07:16:00,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:16:00,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:00,760 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:16:00,761 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-10-13 07:16:00,763 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:16:00,764 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-10-13 07:16:01,064 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:16:01,065 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-10-13 07:16:03,115 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~item~0.base_58 (_ BitVec 32)) (v_DerPreprocessor_28 (_ BitVec 32)) (v_ULTIMATE.start_main_~item~0.offset_58 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (or (= (let ((.cse0 (bvadd (_ bv4 32) v_ULTIMATE.start_main_~item~0.offset_58))) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_58 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_58) v_ULTIMATE.start_main_~item~0.offset_58 v_DerPreprocessor_28) .cse0 (_ bv1 32))) (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_58 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_58) v_ULTIMATE.start_main_~item~0.offset_58 (_ bv0 32)) .cse0 v_DerPreprocessor_26)) c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset)) (bvadd (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_58 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_58) v_ULTIMATE.start_main_~item~0.offset_58 (_ bv0 32)) .cse0 v_DerPreprocessor_27)) c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset) (_ bv8 32)))) (_ bv1 32)) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~item~0.base_58))))))) is different from false [2021-10-13 07:16:03,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:16:03,178 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:16:03,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [980259690] [2021-10-13 07:16:03,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [980259690] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:16:03,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1638912446] [2021-10-13 07:16:03,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:16:03,178 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:16:03,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:16:03,179 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:16:03,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-10-13 07:16:04,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:16:04,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:16:04,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-13 07:16:04,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:04,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:16:04,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:16:04,217 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 286 treesize of output 261 [2021-10-13 07:16:04,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:16:09,893 WARN L207 SmtUtils]: Spent 5.67 s on a formula simplification. DAG size of input: 24 DAG size of output: 13 [2021-10-13 07:16:09,894 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-10-13 07:16:09,894 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 334 treesize of output 244 [2021-10-13 07:16:09,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:16:15,564 WARN L207 SmtUtils]: Spent 5.66 s on a formula simplification. DAG size of input: 45 DAG size of output: 22 [2021-10-13 07:16:15,564 INFO L354 Elim1Store]: treesize reduction 82, result has 27.4 percent of original size [2021-10-13 07:16:15,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 412 treesize of output 250 [2021-10-13 07:16:15,571 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:16:15,572 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 376 [2021-10-13 07:16:15,576 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:16:15,577 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 381 [2021-10-13 07:16:15,582 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:16:15,583 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 363 [2021-10-13 07:16:16,351 INFO L354 Elim1Store]: treesize reduction 144, result has 19.1 percent of original size [2021-10-13 07:16:16,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 363 treesize of output 337 [2021-10-13 07:16:16,352 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 07:16:17,062 INFO L354 Elim1Store]: treesize reduction 119, result has 14.4 percent of original size [2021-10-13 07:16:17,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 323 treesize of output 315 [2021-10-13 07:16:17,069 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:16:17,070 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 269 [2021-10-13 07:16:17,073 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:16:17,074 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 274 [2021-10-13 07:16:17,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:16:17,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:16:17,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:16:17,199 INFO L354 Elim1Store]: treesize reduction 268, result has 15.7 percent of original size [2021-10-13 07:16:17,200 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 5 case distinctions, treesize of input 274 treesize of output 239 [2021-10-13 07:16:17,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:16:17,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:16:17,926 INFO L354 Elim1Store]: treesize reduction 318, result has 17.8 percent of original size [2021-10-13 07:16:17,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 235 treesize of output 249 [2021-10-13 07:16:17,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:16:17,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:16:18,128 INFO L354 Elim1Store]: treesize reduction 198, result has 18.5 percent of original size [2021-10-13 07:16:18,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 231 treesize of output 183 [2021-10-13 07:16:18,188 INFO L354 Elim1Store]: treesize reduction 112, result has 19.4 percent of original size [2021-10-13 07:16:18,188 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 3 case distinctions, treesize of input 227 treesize of output 218 [2021-10-13 07:16:18,248 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-10-13 07:16:18,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 216 [2021-10-13 07:16:18,255 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 07:16:18,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:16:18,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:16:19,042 INFO L354 Elim1Store]: treesize reduction 258, result has 12.2 percent of original size [2021-10-13 07:16:19,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 23 case distinctions, treesize of input 242 treesize of output 182 [2021-10-13 07:16:19,112 INFO L354 Elim1Store]: treesize reduction 112, result has 19.4 percent of original size [2021-10-13 07:16:19,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 223 treesize of output 225 [2021-10-13 07:16:19,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:16:19,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:16:19,265 INFO L354 Elim1Store]: treesize reduction 402, result has 13.0 percent of original size [2021-10-13 07:16:19,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 23 case distinctions, treesize of input 219 treesize of output 221 [2021-10-13 07:16:21,503 INFO L354 Elim1Store]: treesize reduction 117, result has 3.3 percent of original size [2021-10-13 07:16:21,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 205 treesize of output 115 [2021-10-13 07:16:21,544 INFO L354 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2021-10-13 07:16:21,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 91 treesize of output 59 [2021-10-13 07:16:21,739 INFO L354 Elim1Store]: treesize reduction 33, result has 10.8 percent of original size [2021-10-13 07:16:21,740 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 28 [2021-10-13 07:16:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:16:21,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:21,858 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:16:21,859 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-10-13 07:16:21,866 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:16:21,866 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-10-13 07:16:22,141 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:16:22,142 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 64 [2021-10-13 07:16:24,196 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~item~0.base_60 (_ BitVec 32)) (v_ULTIMATE.start_main_~item~0.offset_60 (_ BitVec 32)) (v_DerPreprocessor_36 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (or (= (let ((.cse0 (bvadd (_ bv4 32) v_ULTIMATE.start_main_~item~0.offset_60))) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_60 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_60) v_ULTIMATE.start_main_~item~0.offset_60 v_DerPreprocessor_36) .cse0 (_ bv1 32))) (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_60 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_60) v_ULTIMATE.start_main_~item~0.offset_60 (_ bv0 32)) .cse0 v_DerPreprocessor_26)) c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset)) (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_60 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_60) v_ULTIMATE.start_main_~item~0.offset_60 (_ bv0 32)) .cse0 v_DerPreprocessor_27)) c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset)))) (_ bv1 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~item~0.base_60)))))) is different from false [2021-10-13 07:16:24,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:16:24,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1638912446] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:16:24,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923603655] [2021-10-13 07:16:24,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:16:24,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:16:24,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:16:24,277 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:16:24,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-13 07:16:31,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:16:31,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:16:31,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-13 07:16:31,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:50,962 WARN L207 SmtUtils]: Spent 19.65 s on a formula simplification. DAG size of input: 34 DAG size of output: 13 [2021-10-13 07:16:50,962 INFO L354 Elim1Store]: treesize reduction 92, result has 15.6 percent of original size [2021-10-13 07:16:50,963 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 2 case distinctions, treesize of input 287 treesize of output 262 [2021-10-13 07:17:04,612 WARN L207 SmtUtils]: Spent 13.64 s on a formula simplification. DAG size of input: 59 DAG size of output: 13 [2021-10-13 07:17:04,612 INFO L354 Elim1Store]: treesize reduction 224, result has 7.1 percent of original size [2021-10-13 07:17:04,613 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 335 treesize of output 245 [2021-10-13 07:17:14,422 WARN L207 SmtUtils]: Spent 9.80 s on a formula simplification. DAG size of input: 67 DAG size of output: 22 [2021-10-13 07:17:14,423 INFO L354 Elim1Store]: treesize reduction 216, result has 12.6 percent of original size [2021-10-13 07:17:14,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 413 treesize of output 251 [2021-10-13 07:17:19,658 WARN L207 SmtUtils]: Spent 5.23 s on a formula simplification. DAG size of input: 30 DAG size of output: 12 [2021-10-13 07:17:19,659 INFO L354 Elim1Store]: treesize reduction 119, result has 14.4 percent of original size [2021-10-13 07:17:19,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 436 treesize of output 428 [2021-10-13 07:17:19,668 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:17:19,669 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 422 [2021-10-13 07:17:20,892 INFO L354 Elim1Store]: treesize reduction 615, result has 4.4 percent of original size [2021-10-13 07:17:20,893 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 3 case distinctions, treesize of input 422 treesize of output 336 [2021-10-13 07:17:20,898 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 07:17:20,908 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 325 treesize of output 306 [2021-10-13 07:17:20,912 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:17:20,913 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 270 [2021-10-13 07:17:20,917 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:17:20,918 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 275 [2021-10-13 07:17:20,974 INFO L354 Elim1Store]: treesize reduction 100, result has 18.7 percent of original size [2021-10-13 07:17:20,975 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 2 case distinctions, treesize of input 275 treesize of output 242 [2021-10-13 07:17:21,096 INFO L354 Elim1Store]: treesize reduction 368, result has 9.6 percent of original size [2021-10-13 07:17:21,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 213 treesize of output 225 [2021-10-13 07:17:21,833 INFO L354 Elim1Store]: treesize reduction 280, result has 13.8 percent of original size [2021-10-13 07:17:21,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 245 treesize of output 193 [2021-10-13 07:17:22,096 INFO L354 Elim1Store]: treesize reduction 424, result has 14.0 percent of original size [2021-10-13 07:17:22,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 241 treesize of output 255 [2021-10-13 07:17:22,172 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-10-13 07:17:22,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 241 [2021-10-13 07:17:22,239 INFO L354 Elim1Store]: treesize reduction 112, result has 19.4 percent of original size [2021-10-13 07:17:22,239 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 3 case distinctions, treesize of input 218 treesize of output 209 [2021-10-13 07:17:22,241 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 07:17:23,222 INFO L354 Elim1Store]: treesize reduction 340, result has 9.6 percent of original size [2021-10-13 07:17:23,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 24 case distinctions, treesize of input 250 treesize of output 186 [2021-10-13 07:17:23,418 INFO L354 Elim1Store]: treesize reduction 508, result has 10.6 percent of original size [2021-10-13 07:17:23,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 24 case distinctions, treesize of input 231 treesize of output 233 [2021-10-13 07:17:23,483 INFO L354 Elim1Store]: treesize reduction 112, result has 19.4 percent of original size [2021-10-13 07:17:23,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 212 treesize of output 214 [2021-10-13 07:17:26,122 INFO L354 Elim1Store]: treesize reduction 204, result has 0.5 percent of original size [2021-10-13 07:17:26,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 217 treesize of output 117 [2021-10-13 07:17:26,181 INFO L354 Elim1Store]: treesize reduction 204, result has 0.5 percent of original size [2021-10-13 07:17:26,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 93 treesize of output 59 [2021-10-13 07:17:26,369 INFO L354 Elim1Store]: treesize reduction 33, result has 10.8 percent of original size [2021-10-13 07:17:26,369 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 28 [2021-10-13 07:17:26,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:17:26,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:26,489 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:17:26,490 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-10-13 07:17:26,492 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:17:26,493 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-10-13 07:17:26,768 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:17:26,769 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 64 [2021-10-13 07:17:28,820 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~item~0.base_62 (_ BitVec 32)) (v_DerPreprocessor_42 (_ BitVec 32)) (v_ULTIMATE.start_main_~item~0.offset_62 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~item~0.base_62)))) (= (_ bv1 32) (let ((.cse0 (bvadd (_ bv4 32) v_ULTIMATE.start_main_~item~0.offset_62))) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_62 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_62) v_ULTIMATE.start_main_~item~0.offset_62 v_DerPreprocessor_42) .cse0 (_ bv1 32))) (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_62 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_62) v_ULTIMATE.start_main_~item~0.offset_62 (_ bv0 32)) .cse0 v_DerPreprocessor_26)) c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset)) (bvadd (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_62 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_62) v_ULTIMATE.start_main_~item~0.offset_62 (_ bv0 32)) .cse0 v_DerPreprocessor_27)) c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset) (_ bv8 32))))))) is different from false [2021-10-13 07:17:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:17:28,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923603655] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:17:28,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:17:28,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 25 [2021-10-13 07:17:28,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584495980] [2021-10-13 07:17:28,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 07:17:28,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:17:28,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 07:17:28,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=395, Unknown=4, NotChecked=126, Total=600 [2021-10-13 07:17:28,877 INFO L87 Difference]: Start difference. First operand 68 states and 81 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 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 07:17:47,771 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse9 (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~bucket~0.base))) (let ((.cse5 (select .cse9 c_ULTIMATE.start_main_~bucket~0.offset))) (let ((.cse6 (select |c_#memory_$Pointer$.base| .cse5))) (let ((.cse1 (select .cse6 (_ bv0 32)))) (let ((.cse0 (select |c_#memory_$Pointer$.base| .cse1)) (.cse2 (select |c_#memory_$Pointer$.offset| .cse1)) (.cse7 (select |c_#memory_$Pointer$.offset| .cse5)) (.cse11 (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~bucket~0.base)) (.cse10 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~bucket~0.offset))) (and (= (select .cse0 (_ bv4 32)) (_ bv0 32)) (= c_ULTIMATE.start_main_~bucket~0.offset (_ bv0 32)) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| .cse1))) (= (_ bv2 32) (select (select |c_#memory_int| .cse1) (_ bv8 32))) (= (select .cse2 (_ bv4 32)) (_ bv0 32)) (forall ((v_ULTIMATE.start_main_~item~0.base_60 (_ BitVec 32)) (v_ULTIMATE.start_main_~item~0.offset_60 (_ BitVec 32)) (v_DerPreprocessor_36 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (or (= (let ((.cse3 (bvadd (_ bv4 32) v_ULTIMATE.start_main_~item~0.offset_60))) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_60 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_60) v_ULTIMATE.start_main_~item~0.offset_60 v_DerPreprocessor_36) .cse3 (_ bv1 32))) (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_60 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_60) v_ULTIMATE.start_main_~item~0.offset_60 (_ bv0 32)) .cse3 v_DerPreprocessor_26)) c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset)) (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_60 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_60) v_ULTIMATE.start_main_~item~0.offset_60 (_ bv0 32)) .cse3 v_DerPreprocessor_27)) c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset)))) (_ bv1 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~item~0.base_60)))))) (forall ((v_DerPreprocessor_26 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (= (_ bv1 32) (let ((.cse4 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~item~0.offset))) (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~item~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~item~0.base) .cse4 (_ bv1 32))) (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~item~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~item~0.base) .cse4 v_DerPreprocessor_26)) c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset)) (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~item~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~item~0.base) .cse4 v_DerPreprocessor_27)) c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset)))))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| .cse5)) (_ bv1 1))) (not (= .cse1 c_ULTIMATE.start_main_~bucket~0.base)) (= (select .cse6 (_ bv4 32)) (_ bv0 32)) (= (select .cse0 (_ bv0 32)) (_ bv0 32)) (= (_ bv1 32) (select (select |c_#memory_int| .cse5) (_ bv8 32))) (= (select .cse2 (_ bv0 32)) (_ bv0 32)) (= (select .cse7 (_ bv4 32)) (_ bv0 32)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~bucket~0.base)) (_ bv1 1))) (= (select .cse7 (_ bv0 32)) (_ bv0 32)) (forall ((v_ULTIMATE.start_main_~item~0.base_58 (_ BitVec 32)) (v_DerPreprocessor_28 (_ BitVec 32)) (v_ULTIMATE.start_main_~item~0.offset_58 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (or (= (let ((.cse8 (bvadd (_ bv4 32) v_ULTIMATE.start_main_~item~0.offset_58))) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_58 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_58) v_ULTIMATE.start_main_~item~0.offset_58 v_DerPreprocessor_28) .cse8 (_ bv1 32))) (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_58 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_58) v_ULTIMATE.start_main_~item~0.offset_58 (_ bv0 32)) .cse8 v_DerPreprocessor_26)) c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset)) (bvadd (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_58 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_58) v_ULTIMATE.start_main_~item~0.offset_58 (_ bv0 32)) .cse8 v_DerPreprocessor_27)) c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset) (_ bv8 32)))) (_ bv1 32)) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~item~0.base_58))))))) (= (select .cse9 .cse10) (_ bv0 32)) (= (select .cse11 c_ULTIMATE.start_main_~bucket~0.offset) (_ bv0 32)) (= (select .cse11 .cse10) (_ bv0 32)) (forall ((v_ULTIMATE.start_main_~item~0.base_62 (_ BitVec 32)) (v_DerPreprocessor_42 (_ BitVec 32)) (v_ULTIMATE.start_main_~item~0.offset_62 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~item~0.base_62)))) (= (_ bv1 32) (let ((.cse12 (bvadd (_ bv4 32) v_ULTIMATE.start_main_~item~0.offset_62))) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_62 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_62) v_ULTIMATE.start_main_~item~0.offset_62 v_DerPreprocessor_42) .cse12 (_ bv1 32))) (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_62 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_62) v_ULTIMATE.start_main_~item~0.offset_62 (_ bv0 32)) .cse12 v_DerPreprocessor_26)) c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset)) (bvadd (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_62 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_62) v_ULTIMATE.start_main_~item~0.offset_62 (_ bv0 32)) .cse12 v_DerPreprocessor_27)) c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset) (_ bv8 32))))))))))))) is different from false [2021-10-13 07:18:02,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:18:02,621 INFO L93 Difference]: Finished difference Result 144 states and 177 transitions. [2021-10-13 07:18:02,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 07:18:02,623 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 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 20 [2021-10-13 07:18:02,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:18:02,624 INFO L225 Difference]: With dead ends: 144 [2021-10-13 07:18:02,625 INFO L226 Difference]: Without dead ends: 110 [2021-10-13 07:18:02,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 19657.5ms TimeCoverageRelationStatistics Valid=148, Invalid=618, Unknown=6, NotChecked=220, Total=992 [2021-10-13 07:18:02,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-13 07:18:02,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 75. [2021-10-13 07:18:02,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 74 states have internal predecessors, (89), 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 07:18:02,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2021-10-13 07:18:02,647 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 20 [2021-10-13 07:18:02,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:18:02,648 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2021-10-13 07:18:02,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 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 07:18:02,648 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2021-10-13 07:18:02,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 07:18:02,649 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:18:02,650 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:18:02,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-10-13 07:18:02,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-13 07:18:03,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-13 07:18:03,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:18:03,255 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 07:18:03,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:18:03,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1643406491, now seen corresponding path program 1 times [2021-10-13 07:18:03,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:18:03,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043011140] [2021-10-13 07:18:03,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:03,257 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:18:03,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:18:03,258 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:18:03,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 07:18:04,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:04,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-13 07:18:04,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:04,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:04,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:04,273 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 252 treesize of output 227 [2021-10-13 07:18:11,587 WARN L207 SmtUtils]: Spent 7.30 s on a formula simplification. DAG size of input: 25 DAG size of output: 9 [2021-10-13 07:18:11,587 INFO L354 Elim1Store]: treesize reduction 47, result has 25.4 percent of original size [2021-10-13 07:18:11,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 230 treesize of output 234 [2021-10-13 07:18:11,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:11,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:11,601 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 225 treesize of output 200 [2021-10-13 07:18:11,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:18:12,510 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-10-13 07:18:12,510 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 237 treesize of output 183 [2021-10-13 07:18:12,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:18:13,384 INFO L354 Elim1Store]: treesize reduction 82, result has 27.4 percent of original size [2021-10-13 07:18:13,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 323 treesize of output 189 [2021-10-13 07:18:13,390 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:13,391 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 287 [2021-10-13 07:18:13,391 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 07:18:13,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:18:13,586 INFO L354 Elim1Store]: treesize reduction 224, result has 14.8 percent of original size [2021-10-13 07:18:13,586 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 5 case distinctions, treesize of input 287 treesize of output 289 [2021-10-13 07:18:13,591 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:13,592 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 232 [2021-10-13 07:18:13,597 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 232 treesize of output 217 [2021-10-13 07:18:13,876 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-10-13 07:18:13,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 231 [2021-10-13 07:18:13,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:13,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:18:14,062 INFO L354 Elim1Store]: treesize reduction 198, result has 18.5 percent of original size [2021-10-13 07:18:14,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 228 treesize of output 172 [2021-10-13 07:18:14,149 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-10-13 07:18:14,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 224 treesize of output 228 [2021-10-13 07:18:14,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:14,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:18:14,317 INFO L354 Elim1Store]: treesize reduction 318, result has 17.8 percent of original size [2021-10-13 07:18:14,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 204 treesize of output 218 [2021-10-13 07:18:14,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:14,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:18:15,059 INFO L354 Elim1Store]: treesize reduction 258, result has 12.2 percent of original size [2021-10-13 07:18:15,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 23 case distinctions, treesize of input 247 treesize of output 179 [2021-10-13 07:18:15,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:15,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:18:15,231 INFO L354 Elim1Store]: treesize reduction 402, result has 13.0 percent of original size [2021-10-13 07:18:15,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 23 case distinctions, treesize of input 228 treesize of output 230 [2021-10-13 07:18:15,271 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-10-13 07:18:15,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 209 treesize of output 208 [2021-10-13 07:18:20,005 INFO L354 Elim1Store]: treesize reduction 217, result has 3.6 percent of original size [2021-10-13 07:18:20,006 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 10 new quantified variables, introduced 28 case distinctions, treesize of input 226 treesize of output 119 [2021-10-13 07:18:20,080 INFO L354 Elim1Store]: treesize reduction 194, result has 1.5 percent of original size [2021-10-13 07:18:20,081 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 92 treesize of output 62 [2021-10-13 07:18:20,178 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-13 07:18:20,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 17 [2021-10-13 07:18:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:20,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:20,702 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:20,704 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-10-13 07:18:20,706 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:20,707 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-10-13 07:18:21,739 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:21,740 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 132 [2021-10-13 07:18:23,807 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~item~0.base_64 (_ BitVec 32)) (v_ULTIMATE.start_main_~item~0.offset_64 (_ BitVec 32)) (v_DerPreprocessor_46 (_ BitVec 32)) (v_DerPreprocessor_47 (_ BitVec 32)) (v_DerPreprocessor_45 (_ BitVec 32))) (or (= (_ bv2 32) (let ((.cse0 (bvadd (_ bv4 32) v_ULTIMATE.start_main_~item~0.offset_64))) (let ((.cse4 (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_64 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_64) v_ULTIMATE.start_main_~item~0.offset_64 (_ bv0 32)) .cse0 v_DerPreprocessor_46))) (.cse1 (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_64 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_64) v_ULTIMATE.start_main_~item~0.offset_64 (_ bv0 32)) .cse0 v_DerPreprocessor_45)))) (let ((.cse2 (select (select .cse1 c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset)) (.cse3 (select (select .cse4 c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset))) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_64 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_64) v_ULTIMATE.start_main_~item~0.offset_64 v_DerPreprocessor_47) .cse0 (_ bv2 32))) (select (select .cse1 .cse2) .cse3)) (bvadd (_ bv8 32) (select (select .cse4 .cse2) .cse3))))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~item~0.base_64)))))) is different from false [2021-10-13 07:18:23,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:23,859 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:18:23,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043011140] [2021-10-13 07:18:23,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043011140] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:18:23,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1576882540] [2021-10-13 07:18:23,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:23,859 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:18:23,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:18:23,860 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:18:23,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-10-13 07:18:25,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:25,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-13 07:18:25,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:49,837 WARN L207 SmtUtils]: Spent 24.64 s on a formula simplification. DAG size of input: 25 DAG size of output: 9 [2021-10-13 07:18:49,837 INFO L354 Elim1Store]: treesize reduction 47, result has 25.4 percent of original size [2021-10-13 07:18:49,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 254 treesize of output 258 [2021-10-13 07:18:49,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:49,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:49,854 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 250 treesize of output 225 [2021-10-13 07:18:49,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:18:52,649 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-10-13 07:18:52,650 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 274 treesize of output 208 [2021-10-13 07:18:52,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:18:55,505 INFO L354 Elim1Store]: treesize reduction 82, result has 27.4 percent of original size [2021-10-13 07:18:55,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 360 treesize of output 214 [2021-10-13 07:18:55,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:55,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:55,517 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 360 treesize of output 323 [2021-10-13 07:18:55,521 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:55,522 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 287 [2021-10-13 07:18:55,523 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 07:18:55,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:18:55,704 INFO L354 Elim1Store]: treesize reduction 224, result has 14.8 percent of original size [2021-10-13 07:18:55,704 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 5 case distinctions, treesize of input 287 treesize of output 289 [2021-10-13 07:18:55,712 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 268 treesize of output 241 [2021-10-13 07:18:55,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 205 [2021-10-13 07:18:55,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:55,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:18:56,006 INFO L354 Elim1Store]: treesize reduction 96, result has 18.6 percent of original size [2021-10-13 07:18:56,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 243 treesize of output 187 [2021-10-13 07:18:56,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:56,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:18:56,117 INFO L354 Elim1Store]: treesize reduction 180, result has 15.9 percent of original size [2021-10-13 07:18:56,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 239 treesize of output 253 [2021-10-13 07:18:56,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 223 [2021-10-13 07:18:56,197 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-10-13 07:18:56,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 224 [2021-10-13 07:18:56,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:56,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:56,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:18:56,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:18:56,880 INFO L354 Elim1Store]: treesize reduction 108, result has 12.2 percent of original size [2021-10-13 07:18:56,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 20 case distinctions, treesize of input 247 treesize of output 179 [2021-10-13 07:18:56,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:56,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:56,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:18:56,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:18:56,958 INFO L354 Elim1Store]: treesize reduction 204, result has 11.7 percent of original size [2021-10-13 07:18:56,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 228 treesize of output 230 [2021-10-13 07:18:56,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:56,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 208 [2021-10-13 07:19:02,000 INFO L354 Elim1Store]: treesize reduction 242, result has 1.2 percent of original size [2021-10-13 07:19:02,000 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 243 treesize of output 177 [2021-10-13 07:19:02,662 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-10-13 07:19:02,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 162 treesize of output 76 [2021-10-13 07:19:02,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:02,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:19:04,529 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:19:04,530 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 203 [2021-10-13 07:19:04,534 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:19:04,535 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 253 [2021-10-13 07:19:04,932 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:19:04,933 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 296 [2021-10-13 07:19:07,157 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_50 (_ BitVec 32)) (v_ULTIMATE.start_main_~item~0.base_66 (_ BitVec 32)) (v_DerPreprocessor_51 (_ BitVec 32)) (v_DerPreprocessor_49 (_ BitVec 32))) (let ((.cse6 (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_66 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_66) (_ bv0 32) (_ bv0 32)) (_ bv4 32) v_DerPreprocessor_50))) (.cse5 (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_66 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_66) (_ bv0 32) (_ bv0 32)) (_ bv4 32) v_DerPreprocessor_49)))) (let ((.cse1 (select (select .cse5 c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset)) (.cse2 (select (select .cse6 c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset))) (let ((.cse0 (store |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_66 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_66) (_ bv0 32) v_DerPreprocessor_51) (_ bv4 32) (_ bv2 32)))) (.cse3 (select (select .cse5 .cse1) .cse2)) (.cse4 (select (select .cse6 .cse1) .cse2))) (or (not (= (_ bv2 32) (select (select .cse0 (_ bv0 32)) (_ bv8 32)))) (= (select (select .cse0 .cse1) (bvadd (_ bv8 32) .cse2)) (_ bv2 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~item~0.base_66)))) (= (_ bv2 32) (select (select .cse0 .cse3) (bvadd .cse4 (_ bv8 32)))) (not (= (select (select .cse5 .cse3) .cse4) (_ bv0 32)))))))) is different from false [2021-10-13 07:19:07,220 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:07,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1576882540] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:19:07,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663224192] [2021-10-13 07:19:07,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:07,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:19:07,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:19:07,222 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:19:07,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-13 07:19:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:08,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-13 07:19:08,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:19:16,613 WARN L207 SmtUtils]: Spent 8.26 s on a formula simplification. DAG size of input: 33 DAG size of output: 12 [2021-10-13 07:19:16,614 INFO L354 Elim1Store]: treesize reduction 92, result has 15.6 percent of original size [2021-10-13 07:19:16,614 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 2 case distinctions, treesize of input 253 treesize of output 228 [2021-10-13 07:19:23,386 WARN L207 SmtUtils]: Spent 6.77 s on a formula simplification. DAG size of input: 25 DAG size of output: 9 [2021-10-13 07:19:23,387 INFO L354 Elim1Store]: treesize reduction 47, result has 25.4 percent of original size [2021-10-13 07:19:23,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 231 treesize of output 235 [2021-10-13 07:19:26,838 INFO L354 Elim1Store]: treesize reduction 92, result has 15.6 percent of original size [2021-10-13 07:19:26,839 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 2 case distinctions, treesize of input 225 treesize of output 200 [2021-10-13 07:19:28,771 INFO L354 Elim1Store]: treesize reduction 224, result has 7.1 percent of original size [2021-10-13 07:19:28,772 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 237 treesize of output 183 [2021-10-13 07:19:29,925 INFO L354 Elim1Store]: treesize reduction 216, result has 12.6 percent of original size [2021-10-13 07:19:29,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 323 treesize of output 189 [2021-10-13 07:19:29,933 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:19:29,934 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 287 [2021-10-13 07:19:29,934 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 07:19:29,940 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 287 treesize of output 272 [2021-10-13 07:19:29,944 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:19:29,945 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-10-13 07:19:30,110 INFO L354 Elim1Store]: treesize reduction 800, result has 4.6 percent of original size [2021-10-13 07:19:30,110 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 5 case distinctions, treesize of input 221 treesize of output 223 [2021-10-13 07:19:30,887 INFO L354 Elim1Store]: treesize reduction 280, result has 13.8 percent of original size [2021-10-13 07:19:30,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 248 treesize of output 188 [2021-10-13 07:19:31,174 INFO L354 Elim1Store]: treesize reduction 424, result has 14.0 percent of original size [2021-10-13 07:19:31,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 244 treesize of output 258 [2021-10-13 07:19:31,249 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-10-13 07:19:31,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 240 treesize of output 244 [2021-10-13 07:19:31,293 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-10-13 07:19:31,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 223 treesize of output 211 [2021-10-13 07:19:31,294 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 07:19:32,284 INFO L354 Elim1Store]: treesize reduction 340, result has 9.6 percent of original size [2021-10-13 07:19:32,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 24 case distinctions, treesize of input 255 treesize of output 183 [2021-10-13 07:19:32,475 INFO L354 Elim1Store]: treesize reduction 508, result has 10.6 percent of original size [2021-10-13 07:19:32,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 24 case distinctions, treesize of input 236 treesize of output 238 [2021-10-13 07:19:32,512 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-10-13 07:19:32,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 217 treesize of output 216 [2021-10-13 07:19:38,104 INFO L354 Elim1Store]: treesize reduction 308, result has 1.0 percent of original size [2021-10-13 07:19:38,105 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 10 new quantified variables, introduced 28 case distinctions, treesize of input 238 treesize of output 121 [2021-10-13 07:19:38,211 INFO L354 Elim1Store]: treesize reduction 280, result has 1.1 percent of original size [2021-10-13 07:19:38,211 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 94 treesize of output 62 [2021-10-13 07:19:38,240 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-13 07:19:38,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 17 [2021-10-13 07:19:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:38,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:19:38,379 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:19:38,380 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-10-13 07:19:38,382 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:19:38,383 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-10-13 07:19:39,091 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:19:39,091 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 132 [2021-10-13 07:19:41,140 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~item~0.base_68 (_ BitVec 32)) (v_DerPreprocessor_46 (_ BitVec 32)) (v_DerPreprocessor_45 (_ BitVec 32)) (v_DerPreprocessor_56 (_ BitVec 32)) (v_ULTIMATE.start_main_~item~0.offset_68 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~item~0.base_68)))) (= (let ((.cse0 (bvadd (_ bv4 32) v_ULTIMATE.start_main_~item~0.offset_68))) (let ((.cse4 (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_68 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_68) v_ULTIMATE.start_main_~item~0.offset_68 (_ bv0 32)) .cse0 v_DerPreprocessor_46))) (.cse1 (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_68 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_68) v_ULTIMATE.start_main_~item~0.offset_68 (_ bv0 32)) .cse0 v_DerPreprocessor_45)))) (let ((.cse2 (select (select .cse1 c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset)) (.cse3 (select (select .cse4 c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset))) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_68 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_68) v_ULTIMATE.start_main_~item~0.offset_68 v_DerPreprocessor_56) .cse0 (_ bv2 32))) (select (select .cse1 .cse2) .cse3)) (bvadd (_ bv8 32) (select (select .cse4 .cse2) .cse3)))))) (_ bv2 32)))) is different from false [2021-10-13 07:19:41,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:41,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663224192] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:19:41,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:19:41,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10, 13, 9, 9] total 40 [2021-10-13 07:19:41,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164015410] [2021-10-13 07:19:41,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-13 07:19:41,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:19:41,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-13 07:19:41,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1171, Unknown=4, NotChecked=216, Total=1560 [2021-10-13 07:19:41,198 INFO L87 Difference]: Start difference. First operand 75 states and 89 transitions. Second operand has 40 states, 40 states have (on average 2.05) internal successors, (82), 40 states have internal predecessors, (82), 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 07:20:01,455 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse25 (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~bucket~0.base))) (let ((.cse14 (select .cse25 c_ULTIMATE.start_main_~bucket~0.offset))) (let ((.cse15 (select |c_#memory_$Pointer$.base| .cse14))) (let ((.cse7 (select .cse15 (_ bv0 32)))) (let ((.cse0 (not (= c_ULTIMATE.start_main_~bcki~0.base (_ bv0 32)))) (.cse21 (select (select |c_#memory_int| c_ULTIMATE.start_main_~item~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~item~0.offset))) (.cse6 (select |c_#memory_$Pointer$.base| .cse7)) (.cse8 (select |c_#memory_$Pointer$.offset| .cse7)) (.cse24 (select |c_#memory_$Pointer$.offset| .cse14)) (.cse27 (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~bucket~0.base)) (.cse26 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~bucket~0.offset))) (and (or (not (= c_ULTIMATE.start_main_~bcki~0.offset (_ bv0 32))) .cse0) (forall ((v_DerPreprocessor_46 (_ BitVec 32)) (v_DerPreprocessor_45 (_ BitVec 32))) (= (let ((.cse1 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~item~0.offset))) (let ((.cse5 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~item~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~item~0.base) .cse1 v_DerPreprocessor_46))) (.cse2 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~item~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~item~0.base) .cse1 v_DerPreprocessor_45)))) (let ((.cse3 (select (select .cse2 c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset)) (.cse4 (select (select .cse5 c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset))) (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~item~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~item~0.base) .cse1 (_ bv2 32))) (select (select .cse2 .cse3) .cse4)) (bvadd (_ bv8 32) (select (select .cse5 .cse3) .cse4)))))) (_ bv2 32))) (= (select .cse6 (_ bv4 32)) (_ bv0 32)) (= c_ULTIMATE.start_main_~bucket~0.offset (_ bv0 32)) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| .cse7))) (= (_ bv2 32) (select (select |c_#memory_int| .cse7) (_ bv8 32))) (= (select .cse8 (_ bv4 32)) (_ bv0 32)) (forall ((v_ULTIMATE.start_main_~item~0.base_64 (_ BitVec 32)) (v_ULTIMATE.start_main_~item~0.offset_64 (_ BitVec 32)) (v_DerPreprocessor_46 (_ BitVec 32)) (v_DerPreprocessor_47 (_ BitVec 32)) (v_DerPreprocessor_45 (_ BitVec 32))) (or (= (_ bv2 32) (let ((.cse9 (bvadd (_ bv4 32) v_ULTIMATE.start_main_~item~0.offset_64))) (let ((.cse13 (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_64 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_64) v_ULTIMATE.start_main_~item~0.offset_64 (_ bv0 32)) .cse9 v_DerPreprocessor_46))) (.cse10 (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_64 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_64) v_ULTIMATE.start_main_~item~0.offset_64 (_ bv0 32)) .cse9 v_DerPreprocessor_45)))) (let ((.cse11 (select (select .cse10 c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset)) (.cse12 (select (select .cse13 c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset))) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_64 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_64) v_ULTIMATE.start_main_~item~0.offset_64 v_DerPreprocessor_47) .cse9 (_ bv2 32))) (select (select .cse10 .cse11) .cse12)) (bvadd (_ bv8 32) (select (select .cse13 .cse11) .cse12))))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~item~0.base_64)))))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| .cse14)) (_ bv1 1))) (not (= .cse7 c_ULTIMATE.start_main_~bucket~0.base)) (= (select .cse15 (_ bv4 32)) (_ bv0 32)) (forall ((v_ULTIMATE.start_main_~item~0.base_68 (_ BitVec 32)) (v_DerPreprocessor_46 (_ BitVec 32)) (v_DerPreprocessor_45 (_ BitVec 32)) (v_DerPreprocessor_56 (_ BitVec 32)) (v_ULTIMATE.start_main_~item~0.offset_68 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~item~0.base_68)))) (= (let ((.cse16 (bvadd (_ bv4 32) v_ULTIMATE.start_main_~item~0.offset_68))) (let ((.cse20 (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_68 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_68) v_ULTIMATE.start_main_~item~0.offset_68 (_ bv0 32)) .cse16 v_DerPreprocessor_46))) (.cse17 (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_68 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_68) v_ULTIMATE.start_main_~item~0.offset_68 (_ bv0 32)) .cse16 v_DerPreprocessor_45)))) (let ((.cse18 (select (select .cse17 c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset)) (.cse19 (select (select .cse20 c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset))) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_68 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_68) v_ULTIMATE.start_main_~item~0.offset_68 v_DerPreprocessor_56) .cse16 (_ bv2 32))) (select (select .cse17 .cse18) .cse19)) (bvadd (_ bv8 32) (select (select .cse20 .cse18) .cse19)))))) (_ bv2 32)))) (or (not (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~bcki~0.base) (_ bv8 32)) .cse21)) .cse0) (let ((.cse22 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~bcki~0.base) c_ULTIMATE.start_main_~bcki~0.offset)) (.cse23 (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~bcki~0.base) c_ULTIMATE.start_main_~bcki~0.offset))) (or (= (select (select |c_#memory_int| .cse22) (bvadd (_ bv8 32) .cse23)) .cse21) (= |c_ULTIMATE.start_main_#t~mem12| |c_ULTIMATE.start_main_#t~mem13|) (not (= (select (select |c_#memory_int| (_ bv0 32)) (_ bv8 32)) .cse21)) (not (= (select (select |c_#memory_$Pointer$.base| .cse22) .cse23) (_ bv0 32))))) (= (select .cse6 (_ bv0 32)) (_ bv0 32)) (not (= .cse7 .cse14)) (= (select .cse8 (_ bv0 32)) (_ bv0 32)) (= (select .cse24 (_ bv4 32)) (_ bv0 32)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~bucket~0.base)) (_ bv1 1))) (= (select .cse24 (_ bv0 32)) (_ bv0 32)) (= (select .cse25 .cse26) (_ bv0 32)) (= (select .cse27 c_ULTIMATE.start_main_~bucket~0.offset) (_ bv0 32)) (= (select .cse27 .cse26) (_ bv0 32)) (forall ((v_DerPreprocessor_50 (_ BitVec 32)) (v_ULTIMATE.start_main_~item~0.base_66 (_ BitVec 32)) (v_DerPreprocessor_51 (_ BitVec 32)) (v_DerPreprocessor_49 (_ BitVec 32))) (let ((.cse34 (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_66 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_66) (_ bv0 32) (_ bv0 32)) (_ bv4 32) v_DerPreprocessor_50))) (.cse33 (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_66 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_66) (_ bv0 32) (_ bv0 32)) (_ bv4 32) v_DerPreprocessor_49)))) (let ((.cse29 (select (select .cse33 c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset)) (.cse30 (select (select .cse34 c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset))) (let ((.cse28 (store |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_66 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_66) (_ bv0 32) v_DerPreprocessor_51) (_ bv4 32) (_ bv2 32)))) (.cse31 (select (select .cse33 .cse29) .cse30)) (.cse32 (select (select .cse34 .cse29) .cse30))) (or (not (= (_ bv2 32) (select (select .cse28 (_ bv0 32)) (_ bv8 32)))) (= (select (select .cse28 .cse29) (bvadd (_ bv8 32) .cse30)) (_ bv2 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~item~0.base_66)))) (= (_ bv2 32) (select (select .cse28 .cse31) (bvadd .cse32 (_ bv8 32)))) (not (= (select (select .cse33 .cse31) .cse32) (_ bv0 32)))))))))))))) is different from false [2021-10-13 07:20:14,404 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (not (= c_ULTIMATE.start_main_~bcki~0.base (_ bv0 32)))) (.cse8 (select (select |c_#memory_int| c_ULTIMATE.start_main_~item~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~item~0.offset)))) (and (or (not (= c_ULTIMATE.start_main_~bcki~0.offset (_ bv0 32))) .cse0) (forall ((v_DerPreprocessor_46 (_ BitVec 32)) (v_DerPreprocessor_45 (_ BitVec 32))) (= (let ((.cse1 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~item~0.offset))) (let ((.cse5 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~item~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~item~0.base) .cse1 v_DerPreprocessor_46))) (.cse2 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~item~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~item~0.base) .cse1 v_DerPreprocessor_45)))) (let ((.cse3 (select (select .cse2 c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset)) (.cse4 (select (select .cse5 c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset))) (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~item~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~item~0.base) .cse1 (_ bv2 32))) (select (select .cse2 .cse3) .cse4)) (bvadd (_ bv8 32) (select (select .cse5 .cse3) .cse4)))))) (_ bv2 32))) (= (let ((.cse6 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~bcki~0.base) c_ULTIMATE.start_main_~bcki~0.offset)) (.cse7 (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~bcki~0.base) c_ULTIMATE.start_main_~bcki~0.offset))) (select (select |c_#memory_int| (select (select |c_#memory_$Pointer$.base| .cse6) .cse7)) (bvadd (select (select |c_#memory_$Pointer$.offset| .cse6) .cse7) (_ bv8 32)))) .cse8) (or (not (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~bcki~0.base) (_ bv8 32)) .cse8)) .cse0) (= .cse8 (let ((.cse9 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset)) (.cse10 (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset))) (select (select |c_#memory_int| (select (select |c_#memory_$Pointer$.base| .cse9) .cse10)) (bvadd (_ bv8 32) (select (select |c_#memory_$Pointer$.offset| .cse9) .cse10))))))) is different from false [2021-10-13 07:20:43,092 WARN L207 SmtUtils]: Spent 16.35 s on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-10-13 07:21:10,213 WARN L207 SmtUtils]: Spent 11.80 s on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-10-13 07:21:12,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:21:12,960 INFO L93 Difference]: Finished difference Result 158 states and 198 transitions. [2021-10-13 07:21:12,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 07:21:12,962 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.05) internal successors, (82), 40 states have internal predecessors, (82), 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 20 [2021-10-13 07:21:12,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:21:12,963 INFO L225 Difference]: With dead ends: 158 [2021-10-13 07:21:12,963 INFO L226 Difference]: Without dead ends: 124 [2021-10-13 07:21:12,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 77493.2ms TimeCoverageRelationStatistics Valid=478, Invalid=2396, Unknown=8, NotChecked=540, Total=3422 [2021-10-13 07:21:12,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-13 07:21:12,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 73. [2021-10-13 07:21:12,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 72 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:21:12,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2021-10-13 07:21:12,983 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 20 [2021-10-13 07:21:12,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:21:12,983 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2021-10-13 07:21:12,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.05) internal successors, (82), 40 states have internal predecessors, (82), 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 07:21:12,984 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2021-10-13 07:21:12,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 07:21:12,985 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:21:12,985 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:21:12,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-10-13 07:21:13,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-10-13 07:21:13,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-13 07:21:13,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:21:13,588 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 07:21:13,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:21:13,588 INFO L82 PathProgramCache]: Analyzing trace with hash -699796204, now seen corresponding path program 1 times [2021-10-13 07:21:13,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:21:13,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751691337] [2021-10-13 07:21:13,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:21:13,589 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:21:13,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:21:13,591 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:21:13,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-13 07:21:14,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:21:14,757 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:21:15,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:21:15,056 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 07:21:15,056 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:21:15,057 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:21:15,059 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:21:15,059 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:21:15,059 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:21:15,059 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:21:15,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-13 07:21:15,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:21:15,266 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:21:15,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:21:15 BoogieIcfgContainer [2021-10-13 07:21:15,318 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:21:15,319 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:21:15,319 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:21:15,319 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:21:15,320 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:08:24" (3/4) ... [2021-10-13 07:21:15,335 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 07:21:15,413 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:21:15,413 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:21:15,414 INFO L168 Benchmark]: Toolchain (without parser) took 774443.23 ms. Allocated memory was 52.4 MB in the beginning and 98.6 MB in the end (delta: 46.1 MB). Free memory was 27.5 MB in the beginning and 21.1 MB in the end (delta: 6.4 MB). Peak memory consumption was 51.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:21:15,414 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 52.4 MB. Free memory was 32.6 MB in the beginning and 32.6 MB in the end (delta: 39.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:21:15,415 INFO L168 Benchmark]: CACSL2BoogieTranslator took 524.26 ms. Allocated memory was 52.4 MB in the beginning and 67.1 MB in the end (delta: 14.7 MB). Free memory was 27.3 MB in the beginning and 42.0 MB in the end (delta: -14.7 MB). Peak memory consumption was 3.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:21:15,415 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.16 ms. Allocated memory is still 67.1 MB. Free memory was 41.8 MB in the beginning and 39.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:21:15,415 INFO L168 Benchmark]: Boogie Preprocessor took 71.84 ms. Allocated memory is still 67.1 MB. Free memory was 39.7 MB in the beginning and 37.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:21:15,415 INFO L168 Benchmark]: RCFGBuilder took 2794.98 ms. Allocated memory is still 67.1 MB. Free memory was 37.5 MB in the beginning and 44.7 MB in the end (delta: -7.2 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:21:15,417 INFO L168 Benchmark]: TraceAbstraction took 770888.30 ms. Allocated memory was 67.1 MB in the beginning and 98.6 MB in the end (delta: 31.5 MB). Free memory was 44.4 MB in the beginning and 23.9 MB in the end (delta: 20.5 MB). Peak memory consumption was 52.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:21:15,426 INFO L168 Benchmark]: Witness Printer took 94.66 ms. Allocated memory is still 98.6 MB. Free memory was 23.9 MB in the beginning and 21.1 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:21:15,428 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 52.4 MB. Free memory was 32.6 MB in the beginning and 32.6 MB in the end (delta: 39.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 524.26 ms. Allocated memory was 52.4 MB in the beginning and 67.1 MB in the end (delta: 14.7 MB). Free memory was 27.3 MB in the beginning and 42.0 MB in the end (delta: -14.7 MB). Peak memory consumption was 3.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 57.16 ms. Allocated memory is still 67.1 MB. Free memory was 41.8 MB in the beginning and 39.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 71.84 ms. Allocated memory is still 67.1 MB. Free memory was 39.7 MB in the beginning and 37.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2794.98 ms. Allocated memory is still 67.1 MB. Free memory was 37.5 MB in the beginning and 44.7 MB in the end (delta: -7.2 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 770888.30 ms. Allocated memory was 67.1 MB in the beginning and 98.6 MB in the end (delta: 31.5 MB). Free memory was 44.4 MB in the beginning and 23.9 MB in the end (delta: 20.5 MB). Peak memory consumption was 52.6 MB. Max. memory is 16.1 GB. * Witness Printer took 94.66 ms. Allocated memory is still 98.6 MB. Free memory was 23.9 MB in the beginning and 21.1 MB in the end (delta: 2.8 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 - CounterExampleResult [Line: 1061]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L1004] BCK* bucket = malloc(sizeof(BCK)); [L1005] bucket->data = 0 [L1006] bucket->list = ((void*)0) [L1008] bucket->next = malloc(sizeof(BCK)) [L1009] EXPR bucket->next [L1009] BCK* bcki = bucket->next; [L1010] bcki->data = 1 [L1011] bcki->list = ((void*)0) [L1013] bcki->next = malloc(sizeof(BCK)) [L1014] EXPR bcki->next [L1014] bcki = bcki->next [L1015] bcki->data = 2 [L1016] bcki->list = ((void*)0) [L1017] bcki->next = ((void*)0) [L1019] struct TSLL* item = ((void*)0); [L1020] struct TSLL* itr = ((void*)0); [L1021] COND TRUE __VERIFIER_nondet_int() [L1023] item = malloc(sizeof(SLL)) [L1024] item->next = ((void*)0) [L1025] COND TRUE __VERIFIER_nondet_int() [L1026] item->data = 0 [L1032] bcki = bucket [L1034] COND FALSE !(!(bcki != ((void*)0))) [L1035] COND FALSE !(!(item != ((void*)0))) [L1036] EXPR bcki->data [L1036] EXPR item->data [L1036] COND FALSE !(bcki->data != item->data) [L1038] COND FALSE !(!(bcki != ((void*)0))) [L1040] EXPR bcki->list [L1040] COND TRUE bcki->list == ((void*)0) [L1041] bcki->list = item [L1021] COND FALSE !(__VERIFIER_nondet_int()) [L1052] bcki = bucket [L1053] COND TRUE bcki != ((void*)0) [L1055] EXPR bcki->list [L1055] item = bcki->list [L1056] bcki->list = ((void*)0) [L1057] COND TRUE item != ((void*)0) [L1059] itr = item [L1060] EXPR item->next [L1060] item = item->next [L1061] EXPR itr->data [L1061] EXPR bcki->data [L1061] COND TRUE !(itr->data != bcki->data) [L1061] reach_error() - UnprovableResult [Line: 1034]: 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: 1035]: 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: 1038]: 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: 1064]: 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, 43 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 770732.3ms, OverallIterations: 11, TraceHistogramMax: 4, EmptinessCheckTime: 20.8ms, AutomataDifference: 421515.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 360 SDtfs, 1195 SDslu, 1794 SDs, 0 SdLazy, 2840 SolverSat, 337 SolverUnsat, 75 SolverUnknown, 0 SolverNotchecked, 176599.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 685 GetRequests, 460 SyntacticMatches, 17 SemanticMatches, 208 ConstructedPredicates, 16 IntricatePredicates, 1 DeprecatedPredicates, 1778 ImplicationChecksByTransitivity, 302389.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=9, InterpolantAutomatonStates: 112, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 139.6ms AutomataMinimizationTime, 10 MinimizatonAttempts, 280 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 236.6ms SsaConstructionTime, 8623.1ms SatisfiabilityAnalysisTime, 326352.6ms InterpolantComputationTime, 348 NumberOfCodeBlocks, 348 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 612 ConstructedInterpolants, 133 QuantifiedInterpolants, 43820 SizeOfPredicates, 162 NumberOfNonLiveVariables, 1693 ConjunctsInSsa, 407 ConjunctsInUnsatCore, 40 InterpolantComputations, 10 PerfectInterpolantSequences, 102/258 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-13 07:21:15,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f8625a-12ff-4622-83e0-b382e9102fea/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...