./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 e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/sll-buckets-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw --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 5a4c2149f6fe1f453f0ff04220f5041f2227f6654d0fa84d48205415ce284fcb ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/sll-buckets-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw --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 5a4c2149f6fe1f453f0ff04220f5041f2227f6654d0fa84d48205415ce284fcb .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-e943c26 [2021-10-20 06:10:35,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-20 06:10:35,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-20 06:10:35,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-20 06:10:35,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-20 06:10:35,043 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-20 06:10:35,045 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-20 06:10:35,047 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-20 06:10:35,049 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-20 06:10:35,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-20 06:10:35,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-20 06:10:35,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-20 06:10:35,053 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-20 06:10:35,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-20 06:10:35,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-20 06:10:35,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-20 06:10:35,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-20 06:10:35,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-20 06:10:35,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-20 06:10:35,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-20 06:10:35,067 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-20 06:10:35,069 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-20 06:10:35,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-20 06:10:35,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-20 06:10:35,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-20 06:10:35,075 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-20 06:10:35,076 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-20 06:10:35,077 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-20 06:10:35,077 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-20 06:10:35,079 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-20 06:10:35,079 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-20 06:10:35,080 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-20 06:10:35,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-20 06:10:35,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-20 06:10:35,083 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-20 06:10:35,084 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-20 06:10:35,084 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-20 06:10:35,085 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-20 06:10:35,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-20 06:10:35,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-20 06:10:35,087 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-20 06:10:35,088 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-20 06:10:35,115 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-20 06:10:35,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-20 06:10:35,117 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-20 06:10:35,117 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-20 06:10:35,117 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-20 06:10:35,117 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-20 06:10:35,118 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-20 06:10:35,118 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-20 06:10:35,118 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-20 06:10:35,118 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-20 06:10:35,119 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-20 06:10:35,119 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-20 06:10:35,119 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-20 06:10:35,119 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-20 06:10:35,120 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-20 06:10:35,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-20 06:10:35,121 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-20 06:10:35,121 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-20 06:10:35,121 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-20 06:10:35,121 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-20 06:10:35,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-20 06:10:35,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-20 06:10:35,122 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-20 06:10:35,122 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-20 06:10:35,123 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-20 06:10:35,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-20 06:10:35,123 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-20 06:10:35,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-20 06:10:35,124 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-20 06:10:35,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-20 06:10:35,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 06:10:35,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-20 06:10:35,125 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-20 06:10:35,125 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-20 06:10:35,125 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-20 06:10:35,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-20 06:10:35,125 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-20 06:10:35,126 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-20 06:10:35,126 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-20 06:10:35,126 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_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a4c2149f6fe1f453f0ff04220f5041f2227f6654d0fa84d48205415ce284fcb [2021-10-20 06:10:35,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-20 06:10:35,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-20 06:10:35,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-20 06:10:35,424 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-20 06:10:35,428 INFO L275 PluginConnector]: CDTParser initialized [2021-10-20 06:10:35,429 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/../../sv-benchmarks/c/forester-heap/sll-buckets-2.i [2021-10-20 06:10:35,500 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/data/71cd93d65/d7988e7eaf284c0888f01dd0a746c3e0/FLAG53577e1b0 [2021-10-20 06:10:35,997 INFO L306 CDTParser]: Found 1 translation units. [2021-10-20 06:10:35,998 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/sv-benchmarks/c/forester-heap/sll-buckets-2.i [2021-10-20 06:10:36,011 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/data/71cd93d65/d7988e7eaf284c0888f01dd0a746c3e0/FLAG53577e1b0 [2021-10-20 06:10:36,321 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/data/71cd93d65/d7988e7eaf284c0888f01dd0a746c3e0 [2021-10-20 06:10:36,323 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-20 06:10:36,326 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-20 06:10:36,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-20 06:10:36,330 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-20 06:10:36,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-20 06:10:36,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:10:36" (1/1) ... [2021-10-20 06:10:36,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e6624ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:10:36, skipping insertion in model container [2021-10-20 06:10:36,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:10:36" (1/1) ... [2021-10-20 06:10:36,343 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-20 06:10:36,415 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 06:10:36,768 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_614a3ed9-d4ac-464c-8031-a6de3f18e892/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22663,22676] [2021-10-20 06:10:36,772 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_614a3ed9-d4ac-464c-8031-a6de3f18e892/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22734,22747] [2021-10-20 06:10:36,774 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_614a3ed9-d4ac-464c-8031-a6de3f18e892/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22862,22875] [2021-10-20 06:10:36,778 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_614a3ed9-d4ac-464c-8031-a6de3f18e892/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23275,23288] [2021-10-20 06:10:36,783 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_614a3ed9-d4ac-464c-8031-a6de3f18e892/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23364,23377] [2021-10-20 06:10:36,788 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 06:10:36,803 INFO L203 MainTranslator]: Completed pre-run [2021-10-20 06:10:36,839 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_614a3ed9-d4ac-464c-8031-a6de3f18e892/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22663,22676] [2021-10-20 06:10:36,840 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_614a3ed9-d4ac-464c-8031-a6de3f18e892/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22734,22747] [2021-10-20 06:10:36,857 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_614a3ed9-d4ac-464c-8031-a6de3f18e892/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22862,22875] [2021-10-20 06:10:36,861 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_614a3ed9-d4ac-464c-8031-a6de3f18e892/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23275,23288] [2021-10-20 06:10:36,862 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_614a3ed9-d4ac-464c-8031-a6de3f18e892/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23364,23377] [2021-10-20 06:10:36,864 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 06:10:36,903 INFO L208 MainTranslator]: Completed translation [2021-10-20 06:10:36,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:10:36 WrapperNode [2021-10-20 06:10:36,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-20 06:10:36,906 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-20 06:10:36,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-20 06:10:36,906 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-20 06:10:36,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:10:36" (1/1) ... [2021-10-20 06:10:36,937 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:10:36" (1/1) ... [2021-10-20 06:10:36,970 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-20 06:10:36,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-20 06:10:36,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-20 06:10:36,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-20 06:10:36,989 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:10:36" (1/1) ... [2021-10-20 06:10:36,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:10:36" (1/1) ... [2021-10-20 06:10:36,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:10:36" (1/1) ... [2021-10-20 06:10:36,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:10:36" (1/1) ... [2021-10-20 06:10:37,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:10:36" (1/1) ... [2021-10-20 06:10:37,017 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:10:36" (1/1) ... [2021-10-20 06:10:37,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:10:36" (1/1) ... [2021-10-20 06:10:37,036 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-20 06:10:37,037 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-20 06:10:37,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-20 06:10:37,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-20 06:10:37,040 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:10:36" (1/1) ... [2021-10-20 06:10:37,048 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 06:10:37,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:10:37,072 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-20 06:10:37,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-20 06:10:37,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-20 06:10:37,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-20 06:10:37,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-20 06:10:37,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-20 06:10:37,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-20 06:10:37,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-20 06:10:37,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-20 06:10:37,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-20 06:10:37,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-20 06:10:37,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-20 06:10:37,872 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-20 06:10:37,873 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-10-20 06:10:37,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:10:37 BoogieIcfgContainer [2021-10-20 06:10:37,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-20 06:10:37,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-20 06:10:37,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-20 06:10:37,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-20 06:10:37,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:10:36" (1/3) ... [2021-10-20 06:10:37,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17c93b90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:10:37, skipping insertion in model container [2021-10-20 06:10:37,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:10:36" (2/3) ... [2021-10-20 06:10:37,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17c93b90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:10:37, skipping insertion in model container [2021-10-20 06:10:37,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:10:37" (3/3) ... [2021-10-20 06:10:37,883 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-buckets-2.i [2021-10-20 06:10:37,888 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-20 06:10:37,889 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-10-20 06:10:37,959 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-20 06:10:37,965 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-20 06:10:37,965 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-20 06:10:37,980 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) [2021-10-20 06:10:37,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-20 06:10:37,984 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:10:37,985 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-20 06:10:37,986 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)] === [2021-10-20 06:10:37,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:10:37,991 INFO L82 PathProgramCache]: Analyzing trace with hash 196178540, now seen corresponding path program 1 times [2021-10-20 06:10:38,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:10:38,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482657792] [2021-10-20 06:10:38,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:10:38,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:10:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:10:38,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:10:38,278 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:10:38,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482657792] [2021-10-20 06:10:38,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482657792] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 06:10:38,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:10:38,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 06:10:38,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046166395] [2021-10-20 06:10:38,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 06:10:38,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:10:38,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 06:10:38,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 06:10:38,320 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) [2021-10-20 06:10:38,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:10:38,405 INFO L93 Difference]: Finished difference Result 96 states and 160 transitions. [2021-10-20 06:10:38,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 06:10:38,407 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 [2021-10-20 06:10:38,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:10:38,415 INFO L225 Difference]: With dead ends: 96 [2021-10-20 06:10:38,415 INFO L226 Difference]: Without dead ends: 59 [2021-10-20 06:10:38,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 06:10:38,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-20 06:10:38,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 37. [2021-10-20 06:10:38,449 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) [2021-10-20 06:10:38,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-10-20 06:10:38,451 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 5 [2021-10-20 06:10:38,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:10:38,452 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-10-20 06:10:38,452 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) [2021-10-20 06:10:38,452 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-10-20 06:10:38,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-20 06:10:38,453 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:10:38,453 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:10:38,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-20 06:10:38,454 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)] === [2021-10-20 06:10:38,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:10:38,455 INFO L82 PathProgramCache]: Analyzing trace with hash -450856688, now seen corresponding path program 1 times [2021-10-20 06:10:38,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:10:38,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772319848] [2021-10-20 06:10:38,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:10:38,456 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:10:38,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:10:38,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:10:38,558 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:10:38,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772319848] [2021-10-20 06:10:38,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772319848] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 06:10:38,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:10:38,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 06:10:38,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414343487] [2021-10-20 06:10:38,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 06:10:38,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:10:38,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 06:10:38,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 06:10:38,562 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) [2021-10-20 06:10:38,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:10:38,615 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-10-20 06:10:38,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 06:10:38,616 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 [2021-10-20 06:10:38,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:10:38,617 INFO L225 Difference]: With dead ends: 41 [2021-10-20 06:10:38,617 INFO L226 Difference]: Without dead ends: 39 [2021-10-20 06:10:38,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 06:10:38,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-20 06:10:38,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2021-10-20 06:10:38,622 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) [2021-10-20 06:10:38,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-10-20 06:10:38,623 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 7 [2021-10-20 06:10:38,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:10:38,624 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-10-20 06:10:38,624 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) [2021-10-20 06:10:38,624 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-10-20 06:10:38,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-20 06:10:38,625 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:10:38,625 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:10:38,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-20 06:10:38,625 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)] === [2021-10-20 06:10:38,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:10:38,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1874340424, now seen corresponding path program 1 times [2021-10-20 06:10:38,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:10:38,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567234932] [2021-10-20 06:10:38,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:10:38,627 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:10:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:10:38,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:10:38,696 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:10:38,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567234932] [2021-10-20 06:10:38,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567234932] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 06:10:38,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:10:38,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 06:10:38,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865276388] [2021-10-20 06:10:38,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 06:10:38,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:10:38,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 06:10:38,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 06:10:38,699 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) [2021-10-20 06:10:38,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:10:38,740 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-10-20 06:10:38,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 06:10:38,741 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 [2021-10-20 06:10:38,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:10:38,741 INFO L225 Difference]: With dead ends: 39 [2021-10-20 06:10:38,742 INFO L226 Difference]: Without dead ends: 37 [2021-10-20 06:10:38,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 06:10:38,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-20 06:10:38,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2021-10-20 06:10:38,746 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) [2021-10-20 06:10:38,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-10-20 06:10:38,747 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 8 [2021-10-20 06:10:38,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:10:38,747 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-10-20 06:10:38,748 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) [2021-10-20 06:10:38,748 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-10-20 06:10:38,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-20 06:10:38,748 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:10:38,749 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:10:38,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-20 06:10:38,749 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)] === [2021-10-20 06:10:38,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:10:38,750 INFO L82 PathProgramCache]: Analyzing trace with hash 2023416261, now seen corresponding path program 1 times [2021-10-20 06:10:38,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:10:38,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572898038] [2021-10-20 06:10:38,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:10:38,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:10:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:10:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:10:38,981 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:10:38,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572898038] [2021-10-20 06:10:38,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572898038] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 06:10:38,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:10:38,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-20 06:10:38,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108856074] [2021-10-20 06:10:38,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-20 06:10:38,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:10:38,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-20 06:10:38,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-20 06:10:38,984 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) [2021-10-20 06:10:39,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:10:39,118 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2021-10-20 06:10:39,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-20 06:10:39,119 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 [2021-10-20 06:10:39,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:10:39,119 INFO L225 Difference]: With dead ends: 53 [2021-10-20 06:10:39,120 INFO L226 Difference]: Without dead ends: 42 [2021-10-20 06:10:39,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 99.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-20 06:10:39,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-20 06:10:39,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2021-10-20 06:10:39,126 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) [2021-10-20 06:10:39,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2021-10-20 06:10:39,127 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 9 [2021-10-20 06:10:39,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:10:39,127 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2021-10-20 06:10:39,127 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) [2021-10-20 06:10:39,127 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2021-10-20 06:10:39,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-20 06:10:39,128 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:10:39,128 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:10:39,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-20 06:10:39,129 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)] === [2021-10-20 06:10:39,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:10:39,130 INFO L82 PathProgramCache]: Analyzing trace with hash 783479132, now seen corresponding path program 1 times [2021-10-20 06:10:39,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:10:39,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089091319] [2021-10-20 06:10:39,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:10:39,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:10:39,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:10:39,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:10:39,245 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:10:39,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089091319] [2021-10-20 06:10:39,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089091319] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-20 06:10:39,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138094388] [2021-10-20 06:10:39,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:10:39,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:10:39,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:10:39,253 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 06:10:39,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-20 06:10:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:10:39,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-20 06:10:39,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:10:39,804 INFO L354 Elim1Store]: treesize reduction 255, result has 13.3 percent of original size [2021-10-20 06:10:39,805 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 [2021-10-20 06:10:39,846 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:39,853 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 266 [2021-10-20 06:10:39,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:10:39,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:10:39,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:10:39,968 INFO L354 Elim1Store]: treesize reduction 228, result has 14.3 percent of original size [2021-10-20 06:10:39,985 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 [2021-10-20 06:10:40,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:10:40,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:10:40,109 INFO L354 Elim1Store]: treesize reduction 284, result has 12.3 percent of original size [2021-10-20 06:10:40,110 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 [2021-10-20 06:10:41,390 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 [2021-10-20 06:10:41,418 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-20 06:10:41,418 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 [2021-10-20 06:10:41,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:10:41,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:10:41,620 INFO L354 Elim1Store]: treesize reduction 584, result has 8.5 percent of original size [2021-10-20 06:10:41,621 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 [2021-10-20 06:10:41,759 INFO L354 Elim1Store]: treesize reduction 160, result has 33.6 percent of original size [2021-10-20 06:10:41,760 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 [2021-10-20 06:10:41,951 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 [2021-10-20 06:10:41,961 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 [2021-10-20 06:10:41,978 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 [2021-10-20 06:10:42,127 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 [2021-10-20 06:10:42,613 INFO L354 Elim1Store]: treesize reduction 201, result has 2.0 percent of original size [2021-10-20 06:10:42,614 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 [2021-10-20 06:10:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:10:42,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:10:42,739 INFO L354 Elim1Store]: treesize reduction 44, result has 15.4 percent of original size [2021-10-20 06:10:42,739 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 [2021-10-20 06:10:42,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,761 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 [2021-10-20 06:10:42,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-10-20 06:10:42,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [229107784] [2021-10-20 06:10:42,790 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-10-20 06:10:42,790 INFO L166 IcfgInterpreter]: Building call graph [2021-10-20 06:10:42,794 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-20 06:10:42,799 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-20 06:10:42,800 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-20 06:10:42,836 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,843 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,844 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,844 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,845 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,845 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-10-20 06:10:42,846 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-20 06:10:42,847 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,848 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,848 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,849 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,849 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-10-20 06:10:42,850 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-20 06:10:42,851 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,851 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,852 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,853 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,853 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-10-20 06:10:42,854 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-10-20 06:10:42,856 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,856 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,858 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,860 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,860 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-10-20 06:10:42,861 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-10-20 06:10:42,863 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,864 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,864 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,865 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,866 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-10-20 06:10:42,867 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-20 06:10:42,869 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,869 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,870 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,870 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,871 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-10-20 06:10:42,872 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-10-20 06:10:42,872 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,873 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,874 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,874 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,875 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-10-20 06:10:42,875 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-10-20 06:10:42,876 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,878 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,879 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,882 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,887 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-10-20 06:10:42,887 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-10-20 06:10:42,889 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,889 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,890 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,890 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,891 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-10-20 06:10:42,891 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-20 06:10:42,892 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,892 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,893 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,893 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,894 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,894 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,895 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-10-20 06:10:42,895 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-20 06:10:42,896 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,896 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,896 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-10-20 06:10:42,897 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-10-20 06:10:42,898 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,898 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,899 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,900 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,900 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-10-20 06:10:42,901 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-10-20 06:10:42,902 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,902 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,903 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,903 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,903 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-10-20 06:10:42,904 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-10-20 06:10:42,905 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,905 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,906 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,906 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,907 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,907 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,907 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-10-20 06:10:42,908 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-20 06:10:42,908 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,909 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,910 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-10-20 06:10:42,911 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-10-20 06:10:42,912 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,912 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,913 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,915 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,916 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-10-20 06:10:42,916 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-10-20 06:10:42,917 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,918 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,919 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,920 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,920 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-10-20 06:10:42,922 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-10-20 06:10:42,923 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,924 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,924 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,925 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,926 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-10-20 06:10:42,927 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-10-20 06:10:42,928 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,930 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,932 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,935 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,935 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,936 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,936 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-10-20 06:10:42,937 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-10-20 06:10:42,937 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,938 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,938 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,938 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,939 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-10-20 06:10:42,939 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-20 06:10:42,940 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,940 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,941 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,941 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,956 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-10-20 06:10:42,957 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-10-20 06:10:42,957 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,958 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,958 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,959 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,959 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-10-20 06:10:42,960 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-10-20 06:10:42,960 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,961 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,962 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 281 [2021-10-20 06:10:42,963 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 282 [2021-10-20 06:10:42,964 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:10:42,968 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:10:42,969 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 478 [2021-10-20 06:10:42,972 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 541 [2021-10-20 06:10:42,991 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@5f3da3a5 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:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-20 06:10:42,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-20 06:10:42,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-20 06:10:42,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963531985] [2021-10-20 06:10:42,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-20 06:10:42,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:10:42,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-20 06:10:42,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-20 06:10:42,999 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) [2021-10-20 06:10:43,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-20 06:10:43,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-20 06:10:43,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:10:43,224 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@5f3da3a5 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:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-20 06:10:43,226 INFO L168 Benchmark]: Toolchain (without parser) took 6899.76 ms. Allocated memory was 81.8 MB in the beginning and 146.8 MB in the end (delta: 65.0 MB). Free memory was 41.4 MB in the beginning and 112.4 MB in the end (delta: -71.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 06:10:43,227 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 81.8 MB. Free memory is still 59.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 06:10:43,227 INFO L168 Benchmark]: CACSL2BoogieTranslator took 574.98 ms. Allocated memory was 81.8 MB in the beginning and 109.1 MB in the end (delta: 27.3 MB). Free memory was 41.2 MB in the beginning and 75.4 MB in the end (delta: -34.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-20 06:10:43,227 INFO L168 Benchmark]: Boogie Procedure Inliner took 64.32 ms. Allocated memory is still 109.1 MB. Free memory was 75.4 MB in the beginning and 73.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 06:10:43,228 INFO L168 Benchmark]: Boogie Preprocessor took 65.28 ms. Allocated memory is still 109.1 MB. Free memory was 73.3 MB in the beginning and 71.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 06:10:43,228 INFO L168 Benchmark]: RCFGBuilder took 838.49 ms. Allocated memory is still 109.1 MB. Free memory was 71.2 MB in the beginning and 43.0 MB in the end (delta: 28.2 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2021-10-20 06:10:43,229 INFO L168 Benchmark]: TraceAbstraction took 5348.73 ms. Allocated memory was 109.1 MB in the beginning and 146.8 MB in the end (delta: 37.7 MB). Free memory was 42.6 MB in the beginning and 112.4 MB in the end (delta: -69.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 06:10:43,231 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 81.8 MB. Free memory is still 59.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 574.98 ms. Allocated memory was 81.8 MB in the beginning and 109.1 MB in the end (delta: 27.3 MB). Free memory was 41.2 MB in the beginning and 75.4 MB in the end (delta: -34.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 64.32 ms. Allocated memory is still 109.1 MB. Free memory was 75.4 MB in the beginning and 73.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 65.28 ms. Allocated memory is still 109.1 MB. Free memory was 73.3 MB in the beginning and 71.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 838.49 ms. Allocated memory is still 109.1 MB. Free memory was 71.2 MB in the beginning and 43.0 MB in the end (delta: 28.2 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5348.73 ms. Allocated memory was 109.1 MB in the beginning and 146.8 MB in the end (delta: 37.7 MB). Free memory was 42.6 MB in the beginning and 112.4 MB in the end (delta: -69.8 MB). There was no memory consumed. 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@5f3da3a5 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@5f3da3a5: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-20 06:10:43,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/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-e943c26 [2021-10-20 06:10:45,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-20 06:10:45,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-20 06:10:45,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-20 06:10:45,746 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-20 06:10:45,751 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-20 06:10:45,753 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-20 06:10:45,755 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-20 06:10:45,757 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-20 06:10:45,758 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-20 06:10:45,759 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-20 06:10:45,761 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-20 06:10:45,761 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-20 06:10:45,763 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-20 06:10:45,764 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-20 06:10:45,766 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-20 06:10:45,767 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-20 06:10:45,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-20 06:10:45,770 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-20 06:10:45,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-20 06:10:45,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-20 06:10:45,775 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-20 06:10:45,777 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-20 06:10:45,778 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-20 06:10:45,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-20 06:10:45,782 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-20 06:10:45,782 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-20 06:10:45,784 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-20 06:10:45,784 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-20 06:10:45,785 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-20 06:10:45,786 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-20 06:10:45,787 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-20 06:10:45,788 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-20 06:10:45,789 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-20 06:10:45,790 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-20 06:10:45,790 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-20 06:10:45,791 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-20 06:10:45,792 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-20 06:10:45,792 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-20 06:10:45,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-20 06:10:45,794 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-20 06:10:45,795 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-20 06:10:45,821 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-20 06:10:45,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-20 06:10:45,823 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-20 06:10:45,823 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-20 06:10:45,823 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-20 06:10:45,823 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-20 06:10:45,824 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-20 06:10:45,824 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-20 06:10:45,824 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-20 06:10:45,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-20 06:10:45,825 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-20 06:10:45,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-20 06:10:45,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-20 06:10:45,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-20 06:10:45,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-20 06:10:45,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-20 06:10:45,826 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-20 06:10:45,827 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-20 06:10:45,827 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-20 06:10:45,827 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-20 06:10:45,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-20 06:10:45,828 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-20 06:10:45,828 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-20 06:10:45,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-20 06:10:45,828 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-20 06:10:45,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-20 06:10:45,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 06:10:45,829 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-20 06:10:45,829 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-20 06:10:45,830 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-20 06:10:45,830 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-20 06:10:45,830 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-20 06:10:45,830 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-20 06:10:45,830 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-20 06:10:45,831 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-20 06:10:45,831 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_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a4c2149f6fe1f453f0ff04220f5041f2227f6654d0fa84d48205415ce284fcb [2021-10-20 06:10:46,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-20 06:10:46,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-20 06:10:46,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-20 06:10:46,234 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-20 06:10:46,234 INFO L275 PluginConnector]: CDTParser initialized [2021-10-20 06:10:46,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/../../sv-benchmarks/c/forester-heap/sll-buckets-2.i [2021-10-20 06:10:46,300 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/data/8a5424813/55279830844c43fca732d90ac009205b/FLAGc183dc62a [2021-10-20 06:10:46,827 INFO L306 CDTParser]: Found 1 translation units. [2021-10-20 06:10:46,828 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/sv-benchmarks/c/forester-heap/sll-buckets-2.i [2021-10-20 06:10:46,848 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/data/8a5424813/55279830844c43fca732d90ac009205b/FLAGc183dc62a [2021-10-20 06:10:47,160 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/data/8a5424813/55279830844c43fca732d90ac009205b [2021-10-20 06:10:47,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-20 06:10:47,164 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-20 06:10:47,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-20 06:10:47,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-20 06:10:47,169 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-20 06:10:47,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:10:47" (1/1) ... [2021-10-20 06:10:47,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77a4822e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:10:47, skipping insertion in model container [2021-10-20 06:10:47,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:10:47" (1/1) ... [2021-10-20 06:10:47,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-20 06:10:47,224 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 06:10:47,504 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_614a3ed9-d4ac-464c-8031-a6de3f18e892/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22663,22676] [2021-10-20 06:10:47,510 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_614a3ed9-d4ac-464c-8031-a6de3f18e892/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22734,22747] [2021-10-20 06:10:47,516 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22862,22875] [2021-10-20 06:10:47,538 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_614a3ed9-d4ac-464c-8031-a6de3f18e892/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23275,23288] [2021-10-20 06:10:47,540 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_614a3ed9-d4ac-464c-8031-a6de3f18e892/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23364,23377] [2021-10-20 06:10:47,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 06:10:47,560 INFO L203 MainTranslator]: Completed pre-run [2021-10-20 06:10:47,599 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_614a3ed9-d4ac-464c-8031-a6de3f18e892/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22663,22676] [2021-10-20 06:10:47,600 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_614a3ed9-d4ac-464c-8031-a6de3f18e892/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22734,22747] [2021-10-20 06:10:47,601 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_614a3ed9-d4ac-464c-8031-a6de3f18e892/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22862,22875] [2021-10-20 06:10:47,605 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_614a3ed9-d4ac-464c-8031-a6de3f18e892/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23275,23288] [2021-10-20 06:10:47,606 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_614a3ed9-d4ac-464c-8031-a6de3f18e892/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23364,23377] [2021-10-20 06:10:47,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 06:10:47,638 INFO L208 MainTranslator]: Completed translation [2021-10-20 06:10:47,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:10:47 WrapperNode [2021-10-20 06:10:47,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-20 06:10:47,640 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-20 06:10:47,640 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-20 06:10:47,640 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-20 06:10:47,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:10:47" (1/1) ... [2021-10-20 06:10:47,665 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:10:47" (1/1) ... [2021-10-20 06:10:47,690 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-20 06:10:47,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-20 06:10:47,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-20 06:10:47,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-20 06:10:47,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:10:47" (1/1) ... [2021-10-20 06:10:47,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:10:47" (1/1) ... [2021-10-20 06:10:47,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:10:47" (1/1) ... [2021-10-20 06:10:47,704 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:10:47" (1/1) ... [2021-10-20 06:10:47,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:10:47" (1/1) ... [2021-10-20 06:10:47,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:10:47" (1/1) ... [2021-10-20 06:10:47,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:10:47" (1/1) ... [2021-10-20 06:10:47,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-20 06:10:47,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-20 06:10:47,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-20 06:10:47,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-20 06:10:47,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:10:47" (1/1) ... [2021-10-20 06:10:47,739 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 06:10:47,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:10:47,768 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-20 06:10:47,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-20 06:10:47,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-20 06:10:47,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-20 06:10:47,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-20 06:10:47,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-20 06:10:47,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-20 06:10:47,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-20 06:10:47,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-20 06:10:47,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-20 06:10:47,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-20 06:10:47,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-20 06:10:50,275 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-20 06:10:50,275 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-10-20 06:10:50,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:10:50 BoogieIcfgContainer [2021-10-20 06:10:50,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-20 06:10:50,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-20 06:10:50,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-20 06:10:50,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-20 06:10:50,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:10:47" (1/3) ... [2021-10-20 06:10:50,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41aa1352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:10:50, skipping insertion in model container [2021-10-20 06:10:50,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:10:47" (2/3) ... [2021-10-20 06:10:50,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41aa1352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:10:50, skipping insertion in model container [2021-10-20 06:10:50,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:10:50" (3/3) ... [2021-10-20 06:10:50,286 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-buckets-2.i [2021-10-20 06:10:50,292 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-20 06:10:50,292 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-10-20 06:10:50,336 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-20 06:10:50,342 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-20 06:10:50,342 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-20 06:10:50,358 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) [2021-10-20 06:10:50,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-20 06:10:50,364 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:10:50,365 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:10:50,365 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)] === [2021-10-20 06:10:50,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:10:50,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1810667474, now seen corresponding path program 1 times [2021-10-20 06:10:50,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:10:50,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058517472] [2021-10-20 06:10:50,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:10:50,385 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:10:50,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:10:50,390 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:10:50,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-20 06:10:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:10:50,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-20 06:10:50,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:10:50,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:10:50,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:10:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:10:50,670 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:10:50,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058517472] [2021-10-20 06:10:50,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058517472] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:10:50,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:10:50,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-20 06:10:50,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222272863] [2021-10-20 06:10:50,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 06:10:50,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:10:50,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 06:10:50,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 06:10:50,724 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) [2021-10-20 06:10:50,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:10:50,947 INFO L93 Difference]: Finished difference Result 109 states and 185 transitions. [2021-10-20 06:10:50,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 06:10:50,950 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 [2021-10-20 06:10:50,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:10:50,957 INFO L225 Difference]: With dead ends: 109 [2021-10-20 06:10:50,958 INFO L226 Difference]: Without dead ends: 64 [2021-10-20 06:10:50,960 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 06:10:50,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-20 06:10:50,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 40. [2021-10-20 06:10:50,999 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) [2021-10-20 06:10:51,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2021-10-20 06:10:51,004 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 7 [2021-10-20 06:10:51,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:10:51,005 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2021-10-20 06:10:51,005 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) [2021-10-20 06:10:51,005 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2021-10-20 06:10:51,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-20 06:10:51,006 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:10:51,006 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:10:51,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-20 06:10:51,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:10:51,220 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)] === [2021-10-20 06:10:51,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:10:51,222 INFO L82 PathProgramCache]: Analyzing trace with hash 332382386, now seen corresponding path program 1 times [2021-10-20 06:10:51,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:10:51,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273913243] [2021-10-20 06:10:51,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:10:51,224 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:10:51,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:10:51,225 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:10:51,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-20 06:10:51,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:10:51,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-20 06:10:51,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:10:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:10:51,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:10:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:10:51,475 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:10:51,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273913243] [2021-10-20 06:10:51,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273913243] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:10:51,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:10:51,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-20 06:10:51,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257262026] [2021-10-20 06:10:51,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 06:10:51,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:10:51,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 06:10:51,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 06:10:51,485 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) [2021-10-20 06:10:51,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:10:51,557 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2021-10-20 06:10:51,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 06:10:51,558 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 [2021-10-20 06:10:51,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:10:51,559 INFO L225 Difference]: With dead ends: 43 [2021-10-20 06:10:51,559 INFO L226 Difference]: Without dead ends: 41 [2021-10-20 06:10:51,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 06:10:51,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-20 06:10:51,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-10-20 06:10:51,565 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) [2021-10-20 06:10:51,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-10-20 06:10:51,566 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 8 [2021-10-20 06:10:51,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:10:51,566 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-10-20 06:10:51,567 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) [2021-10-20 06:10:51,567 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-10-20 06:10:51,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-20 06:10:51,568 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:10:51,568 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:10:51,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-20 06:10:51,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:10:51,784 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)] === [2021-10-20 06:10:51,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:10:51,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1713955348, now seen corresponding path program 1 times [2021-10-20 06:10:51,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:10:51,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101590043] [2021-10-20 06:10:51,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:10:51,786 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:10:51,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:10:51,787 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:10:51,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-20 06:10:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:10:51,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-20 06:10:51,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:10:52,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:10:52,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:10:52,142 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 [2021-10-20 06:10:52,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:10:52,994 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-10-20 06:10:52,995 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 [2021-10-20 06:10:53,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:10:53,903 INFO L354 Elim1Store]: treesize reduction 82, result has 27.4 percent of original size [2021-10-20 06:10:53,904 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 [2021-10-20 06:10:53,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:10:53,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:10:53,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-10-20 06:10:53,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:10:53,999 INFO L354 Elim1Store]: treesize reduction 50, result has 25.4 percent of original size [2021-10-20 06:10:53,999 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 [2021-10-20 06:10:54,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:10:54,099 INFO L354 Elim1Store]: treesize reduction 178, result has 18.0 percent of original size [2021-10-20 06:10:54,100 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 [2021-10-20 06:10:54,103 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-20 06:10:54,118 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-10-20 06:10:54,119 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 [2021-10-20 06:10:54,716 INFO L354 Elim1Store]: treesize reduction 45, result has 8.2 percent of original size [2021-10-20 06:10:54,717 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 [2021-10-20 06:10:54,755 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-10-20 06:10:54,756 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 [2021-10-20 06:10:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:10:54,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:10:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:10:55,000 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:10:55,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101590043] [2021-10-20 06:10:55,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101590043] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:10:55,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:10:55,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-20 06:10:55,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511187711] [2021-10-20 06:10:55,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-20 06:10:55,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:10:55,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-20 06:10:55,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-20 06:10:55,004 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) [2021-10-20 06:10:58,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:10:58,023 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2021-10-20 06:10:58,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-20 06:10:58,024 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 [2021-10-20 06:10:58,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:10:58,026 INFO L225 Difference]: With dead ends: 61 [2021-10-20 06:10:58,026 INFO L226 Difference]: Without dead ends: 50 [2021-10-20 06:10:58,027 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 720.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-10-20 06:10:58,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-20 06:10:58,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2021-10-20 06:10:58,035 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) [2021-10-20 06:10:58,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-10-20 06:10:58,036 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 9 [2021-10-20 06:10:58,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:10:58,036 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-10-20 06:10:58,037 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) [2021-10-20 06:10:58,037 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-10-20 06:10:58,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-20 06:10:58,038 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:10:58,038 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:10:58,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-20 06:10:58,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:10:58,253 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)] === [2021-10-20 06:10:58,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:10:58,253 INFO L82 PathProgramCache]: Analyzing trace with hash 589814998, now seen corresponding path program 1 times [2021-10-20 06:10:58,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:10:58,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180637921] [2021-10-20 06:10:58,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:10:58,254 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:10:58,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:10:58,255 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:10:58,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-20 06:10:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:10:58,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-20 06:10:58,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:10:58,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:10:58,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:10:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:10:58,428 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:10:58,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180637921] [2021-10-20 06:10:58,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180637921] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:10:58,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:10:58,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-20 06:10:58,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472284464] [2021-10-20 06:10:58,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 06:10:58,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:10:58,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 06:10:58,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 06:10:58,431 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) [2021-10-20 06:11:00,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:11:00,503 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2021-10-20 06:11:00,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 06:11:00,504 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 [2021-10-20 06:11:00,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:11:00,505 INFO L225 Difference]: With dead ends: 48 [2021-10-20 06:11:00,505 INFO L226 Difference]: Without dead ends: 46 [2021-10-20 06:11:00,506 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 06:11:00,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-20 06:11:00,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-10-20 06:11:00,512 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) [2021-10-20 06:11:00,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2021-10-20 06:11:00,513 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 9 [2021-10-20 06:11:00,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:11:00,514 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2021-10-20 06:11:00,514 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) [2021-10-20 06:11:00,514 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2021-10-20 06:11:00,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-20 06:11:00,515 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:11:00,515 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:11:00,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-20 06:11:00,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:11:00,727 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)] === [2021-10-20 06:11:00,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:11:00,728 INFO L82 PathProgramCache]: Analyzing trace with hash 2092073026, now seen corresponding path program 1 times [2021-10-20 06:11:00,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:11:00,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2002072882] [2021-10-20 06:11:00,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:11:00,729 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:11:00,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:11:00,730 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:11:00,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-20 06:11:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:11:00,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-20 06:11:00,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:11:00,926 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:11:00,928 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 154 [2021-10-20 06:11:01,202 INFO L354 Elim1Store]: treesize reduction 499, result has 7.1 percent of original size [2021-10-20 06:11:01,202 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 [2021-10-20 06:11:01,449 INFO L354 Elim1Store]: treesize reduction 330, result has 10.8 percent of original size [2021-10-20 06:11:01,450 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 [2021-10-20 06:11:01,520 INFO L354 Elim1Store]: treesize reduction 119, result has 14.4 percent of original size [2021-10-20 06:11:01,520 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 [2021-10-20 06:11:01,918 INFO L354 Elim1Store]: treesize reduction 336, result has 12.3 percent of original size [2021-10-20 06:11:01,918 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 [2021-10-20 06:11:02,006 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-10-20 06:11:02,007 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 [2021-10-20 06:11:02,479 INFO L354 Elim1Store]: treesize reduction 498, result has 9.8 percent of original size [2021-10-20 06:11:02,479 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 [2021-10-20 06:11:03,666 INFO L354 Elim1Store]: treesize reduction 256, result has 0.4 percent of original size [2021-10-20 06:11:03,666 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 [2021-10-20 06:11:03,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:11:03,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:11:03,850 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:11:03,851 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-10-20 06:11:05,974 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 [2021-10-20 06:11:06,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:11:06,023 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:11:06,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2002072882] [2021-10-20 06:11:06,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2002072882] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:11:06,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [708159718] [2021-10-20 06:11:06,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:11:06,024 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-20 06:11:06,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/cvc4 [2021-10-20 06:11:06,032 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-20 06:11:06,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-20 06:11:06,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:11:06,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-20 06:11:06,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:11:06,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:11:06,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:11:06,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-10-20 06:11:06,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:11:06,405 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-10-20 06:11:06,406 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 [2021-10-20 06:11:06,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:11:06,493 INFO L354 Elim1Store]: treesize reduction 82, result has 27.4 percent of original size [2021-10-20 06:11:06,494 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 [2021-10-20 06:11:06,548 INFO L354 Elim1Store]: treesize reduction 119, result has 14.4 percent of original size [2021-10-20 06:11:06,548 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 [2021-10-20 06:11:06,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:11:06,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:11:06,857 INFO L354 Elim1Store]: treesize reduction 198, result has 18.5 percent of original size [2021-10-20 06:11:06,858 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 [2021-10-20 06:11:06,898 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-10-20 06:11:06,899 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 [2021-10-20 06:11:07,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:11:07,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:11:07,275 INFO L354 Elim1Store]: treesize reduction 358, result has 12.7 percent of original size [2021-10-20 06:11:07,275 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 [2021-10-20 06:11:08,245 INFO L354 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2021-10-20 06:11:08,246 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 [2021-10-20 06:11:08,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:11:08,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:11:08,326 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:11:08,327 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-10-20 06:11:10,438 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 [2021-10-20 06:11:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:11:10,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [708159718] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:11:10,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211950533] [2021-10-20 06:11:10,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:11:10,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:11:10,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:11:10,492 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 06:11:10,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-20 06:11:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:11:10,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-20 06:11:10,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:11:10,702 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:11:10,704 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 153 [2021-10-20 06:11:10,952 INFO L354 Elim1Store]: treesize reduction 499, result has 7.1 percent of original size [2021-10-20 06:11:10,952 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 [2021-10-20 06:11:11,117 INFO L354 Elim1Store]: treesize reduction 330, result has 10.8 percent of original size [2021-10-20 06:11:11,118 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 [2021-10-20 06:11:11,171 INFO L354 Elim1Store]: treesize reduction 119, result has 14.4 percent of original size [2021-10-20 06:11:11,171 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 [2021-10-20 06:11:11,469 INFO L354 Elim1Store]: treesize reduction 336, result has 12.3 percent of original size [2021-10-20 06:11:11,470 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 [2021-10-20 06:11:11,519 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-10-20 06:11:11,520 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 [2021-10-20 06:11:11,854 INFO L354 Elim1Store]: treesize reduction 498, result has 9.8 percent of original size [2021-10-20 06:11:11,854 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 [2021-10-20 06:11:12,810 INFO L354 Elim1Store]: treesize reduction 256, result has 0.4 percent of original size [2021-10-20 06:11:12,811 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 [2021-10-20 06:11:12,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:11:12,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:11:12,891 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:11:12,892 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-10-20 06:11:14,988 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 [2021-10-20 06:11:15,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:11:15,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211950533] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:11:15,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-20 06:11:15,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 17 [2021-10-20 06:11:15,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916517416] [2021-10-20 06:11:15,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-20 06:11:15,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:11:15,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-20 06:11:15,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=142, Unknown=3, NotChecked=78, Total=272 [2021-10-20 06:11:15,026 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) [2021-10-20 06:12:29,436 WARN L207 SmtUtils]: Spent 56.30 s on a formula simplification. DAG size of input: 103 DAG size of output: 63 [2021-10-20 06:12:41,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:12:41,923 INFO L93 Difference]: Finished difference Result 112 states and 138 transitions. [2021-10-20 06:12:41,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-20 06:12:41,924 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 [2021-10-20 06:12:41,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:12:41,925 INFO L225 Difference]: With dead ends: 112 [2021-10-20 06:12:41,926 INFO L226 Difference]: Without dead ends: 110 [2021-10-20 06:12:41,926 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 76091.5ms TimeCoverageRelationStatistics Valid=105, Invalid=279, Unknown=8, NotChecked=114, Total=506 [2021-10-20 06:12:41,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-20 06:12:41,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 54. [2021-10-20 06:12:41,935 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) [2021-10-20 06:12:41,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2021-10-20 06:12:41,935 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 15 [2021-10-20 06:12:41,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:12:41,936 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2021-10-20 06:12:41,936 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) [2021-10-20 06:12:41,936 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2021-10-20 06:12:41,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-20 06:12:41,937 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:12:41,937 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:12:41,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-20 06:12:42,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-20 06:12:42,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-20 06:12:42,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/cvc4 --incremental --print-success --lang smt [2021-10-20 06:12:42,539 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)] === [2021-10-20 06:12:42,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:12:42,539 INFO L82 PathProgramCache]: Analyzing trace with hash 438935047, now seen corresponding path program 2 times [2021-10-20 06:12:42,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:12:42,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518587782] [2021-10-20 06:12:42,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-20 06:12:42,540 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:12:42,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:12:42,540 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:12:42,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-20 06:12:42,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-20 06:12:42,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-20 06:12:42,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-20 06:12:42,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:12:43,751 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-20 06:12:43,751 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 [2021-10-20 06:12:43,932 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-10-20 06:12:43,933 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 [2021-10-20 06:12:43,936 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:12:43,938 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 129 [2021-10-20 06:12:44,129 INFO L354 Elim1Store]: treesize reduction 169, result has 9.1 percent of original size [2021-10-20 06:12:44,130 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 [2021-10-20 06:12:44,139 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:12:44,141 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-10-20 06:12:44,305 INFO L354 Elim1Store]: treesize reduction 321, result has 9.3 percent of original size [2021-10-20 06:12:44,305 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 [2021-10-20 06:12:44,375 INFO L354 Elim1Store]: treesize reduction 132, result has 16.5 percent of original size [2021-10-20 06:12:44,376 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 [2021-10-20 06:12:44,376 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-20 06:12:44,665 INFO L354 Elim1Store]: treesize reduction 140, result has 15.7 percent of original size [2021-10-20 06:12:44,665 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 [2021-10-20 06:12:44,722 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-10-20 06:12:44,723 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 [2021-10-20 06:12:44,979 INFO L354 Elim1Store]: treesize reduction 106, result has 13.8 percent of original size [2021-10-20 06:12:44,979 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 [2021-10-20 06:12:46,343 INFO L354 Elim1Store]: treesize reduction 90, result has 1.1 percent of original size [2021-10-20 06:12:46,344 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 [2021-10-20 06:12:46,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-20 06:12:46,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:12:46,700 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:12:46,701 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-10-20 06:12:48,737 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 [2021-10-20 06:12:48,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-20 06:12:48,779 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:12:48,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518587782] [2021-10-20 06:12:48,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518587782] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:12:48,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:12:48,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-10-20 06:12:48,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031155490] [2021-10-20 06:12:48,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-20 06:12:48,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:12:48,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-20 06:12:48,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=85, Unknown=1, NotChecked=18, Total=132 [2021-10-20 06:12:48,781 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) [2021-10-20 06:13:11,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:13:11,534 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2021-10-20 06:13:11,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-20 06:13:11,534 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 [2021-10-20 06:13:11,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:13:11,535 INFO L225 Difference]: With dead ends: 118 [2021-10-20 06:13:11,535 INFO L226 Difference]: Without dead ends: 84 [2021-10-20 06:13:11,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2854.6ms TimeCoverageRelationStatistics Valid=58, Invalid=155, Unknown=1, NotChecked=26, Total=240 [2021-10-20 06:13:11,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-20 06:13:11,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 61. [2021-10-20 06:13:11,547 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) [2021-10-20 06:13:11,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2021-10-20 06:13:11,548 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 17 [2021-10-20 06:13:11,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:13:11,548 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2021-10-20 06:13:11,548 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) [2021-10-20 06:13:11,549 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2021-10-20 06:13:11,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-20 06:13:11,550 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:13:11,550 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:13:11,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-10-20 06:13:11,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:13:11,784 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)] === [2021-10-20 06:13:11,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:13:11,784 INFO L82 PathProgramCache]: Analyzing trace with hash -581654046, now seen corresponding path program 1 times [2021-10-20 06:13:11,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:13:11,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706885314] [2021-10-20 06:13:11,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:13:11,785 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:13:11,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:13:11,786 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:13:11,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-20 06:13:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:13:12,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-20 06:13:12,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:13:21,596 WARN L207 SmtUtils]: Spent 9.47 s on a formula simplification. DAG size of input: 25 DAG size of output: 9 [2021-10-20 06:13:21,596 INFO L354 Elim1Store]: treesize reduction 47, result has 25.4 percent of original size [2021-10-20 06:13:21,597 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 [2021-10-20 06:13:24,416 INFO L354 Elim1Store]: treesize reduction 92, result has 15.6 percent of original size [2021-10-20 06:13:24,416 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 [2021-10-20 06:13:27,565 INFO L354 Elim1Store]: treesize reduction 312, result has 9.0 percent of original size [2021-10-20 06:13:27,566 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 [2021-10-20 06:13:29,656 INFO L354 Elim1Store]: treesize reduction 330, result has 10.8 percent of original size [2021-10-20 06:13:29,656 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 11 case distinctions, treesize of input 299 treesize of output 193 [2021-10-20 06:13:29,664 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:13:29,666 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 261 [2021-10-20 06:13:29,671 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:13:29,672 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 266 [2021-10-20 06:13:29,673 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-20 06:13:30,149 INFO L354 Elim1Store]: treesize reduction 1834, result has 4.4 percent of original size [2021-10-20 06:13:30,149 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 [2021-10-20 06:13:30,596 INFO L354 Elim1Store]: treesize reduction 336, result has 12.3 percent of original size [2021-10-20 06:13:30,597 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 [2021-10-20 06:13:30,796 INFO L354 Elim1Store]: treesize reduction 504, result has 12.3 percent of original size [2021-10-20 06:13:30,796 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 [2021-10-20 06:13:30,859 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-10-20 06:13:30,859 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 [2021-10-20 06:13:31,554 INFO L354 Elim1Store]: treesize reduction 498, result has 9.8 percent of original size [2021-10-20 06:13:31,554 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 [2021-10-20 06:13:31,824 INFO L354 Elim1Store]: treesize reduction 690, result has 10.2 percent of original size [2021-10-20 06:13:31,824 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 [2021-10-20 06:13:33,396 INFO L354 Elim1Store]: treesize reduction 376, result has 0.3 percent of original size [2021-10-20 06:13:33,397 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 [2021-10-20 06:13:34,495 INFO L354 Elim1Store]: treesize reduction 256, result has 0.4 percent of original size [2021-10-20 06:13:34,495 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 [2021-10-20 06:13:34,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:13:34,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:13:34,752 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:13:34,753 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-10-20 06:13:34,756 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:13:34,757 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-10-20 06:13:38,958 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 [2021-10-20 06:13:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:13:38,998 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:13:38,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706885314] [2021-10-20 06:13:38,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706885314] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:13:38,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1002048794] [2021-10-20 06:13:38,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:13:38,998 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-20 06:13:38,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/cvc4 [2021-10-20 06:13:38,999 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-20 06:13:39,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-20 06:13:39,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:13:39,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-20 06:13:39,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:13:39,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:13:39,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:13:39,487 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 [2021-10-20 06:13:42,556 INFO L354 Elim1Store]: treesize reduction 47, result has 25.4 percent of original size [2021-10-20 06:13:42,557 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 [2021-10-20 06:13:42,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:13:42,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:13:42,571 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 [2021-10-20 06:13:42,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:13:42,859 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-10-20 06:13:42,859 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 [2021-10-20 06:13:42,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:13:43,139 INFO L354 Elim1Store]: treesize reduction 82, result has 27.4 percent of original size [2021-10-20 06:13:43,140 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 [2021-10-20 06:13:43,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:13:43,196 INFO L354 Elim1Store]: treesize reduction 50, result has 25.4 percent of original size [2021-10-20 06:13:43,196 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 [2021-10-20 06:13:43,197 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-20 06:13:43,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:13:43,287 INFO L354 Elim1Store]: treesize reduction 178, result has 18.0 percent of original size [2021-10-20 06:13:43,287 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 [2021-10-20 06:13:43,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:13:43,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:13:43,669 INFO L354 Elim1Store]: treesize reduction 96, result has 18.6 percent of original size [2021-10-20 06:13:43,670 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 [2021-10-20 06:13:43,709 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-20 06:13:43,710 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 [2021-10-20 06:13:43,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:13:43,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:13:43,790 INFO L354 Elim1Store]: treesize reduction 180, result has 15.9 percent of original size [2021-10-20 06:13:43,790 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 [2021-10-20 06:13:44,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:13:44,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:13:44,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:13:44,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:13:44,286 INFO L354 Elim1Store]: treesize reduction 108, result has 12.2 percent of original size [2021-10-20 06:13:44,286 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 [2021-10-20 06:13:44,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:13:44,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:13:44,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:13:44,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:13:44,351 INFO L354 Elim1Store]: treesize reduction 204, result has 11.7 percent of original size [2021-10-20 06:13:44,352 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 [2021-10-20 06:13:44,444 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 [2021-10-20 06:13:45,683 INFO L354 Elim1Store]: treesize reduction 132, result has 0.8 percent of original size [2021-10-20 06:13:45,684 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 [2021-10-20 06:13:46,350 INFO L354 Elim1Store]: treesize reduction 60, result has 17.8 percent of original size [2021-10-20 06:13:46,350 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 [2021-10-20 06:13:46,503 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-10-20 06:13:46,504 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 [2021-10-20 06:13:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:13:46,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:13:49,554 INFO L354 Elim1Store]: treesize reduction 6, result has 71.4 percent of original size [2021-10-20 06:13:49,554 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 [2021-10-20 06:13:49,574 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:13:49,575 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-10-20 06:13:49,579 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:13:49,580 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 141 [2021-10-20 06:13:56,020 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 [2021-10-20 06:13:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:13:56,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1002048794] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:13:56,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078519052] [2021-10-20 06:13:56,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:13:56,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:13:56,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:13:56,085 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 06:13:56,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-20 06:13:56,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:13:56,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-20 06:13:56,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:13:59,091 INFO L354 Elim1Store]: treesize reduction 92, result has 15.6 percent of original size [2021-10-20 06:13:59,091 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 [2021-10-20 06:14:02,161 INFO L354 Elim1Store]: treesize reduction 312, result has 9.0 percent of original size [2021-10-20 06:14:02,162 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 [2021-10-20 06:14:03,845 INFO L354 Elim1Store]: treesize reduction 330, result has 10.8 percent of original size [2021-10-20 06:14:03,846 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 [2021-10-20 06:14:03,850 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:14:03,851 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 257 [2021-10-20 06:14:03,853 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:14:03,854 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 262 [2021-10-20 06:14:04,311 INFO L354 Elim1Store]: treesize reduction 1834, result has 4.4 percent of original size [2021-10-20 06:14:04,311 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 [2021-10-20 06:14:04,313 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-20 06:14:04,368 INFO L354 Elim1Store]: treesize reduction 119, result has 14.4 percent of original size [2021-10-20 06:14:04,368 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 [2021-10-20 06:14:04,709 INFO L354 Elim1Store]: treesize reduction 336, result has 12.3 percent of original size [2021-10-20 06:14:04,711 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 [2021-10-20 06:14:04,893 INFO L354 Elim1Store]: treesize reduction 504, result has 12.3 percent of original size [2021-10-20 06:14:04,893 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 [2021-10-20 06:14:04,947 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-10-20 06:14:04,947 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 [2021-10-20 06:14:05,530 INFO L354 Elim1Store]: treesize reduction 498, result has 9.8 percent of original size [2021-10-20 06:14:05,530 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 [2021-10-20 06:14:05,734 INFO L354 Elim1Store]: treesize reduction 690, result has 10.2 percent of original size [2021-10-20 06:14:05,734 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 [2021-10-20 06:14:07,018 INFO L354 Elim1Store]: treesize reduction 376, result has 0.3 percent of original size [2021-10-20 06:14:07,018 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 [2021-10-20 06:14:08,138 INFO L354 Elim1Store]: treesize reduction 256, result has 0.4 percent of original size [2021-10-20 06:14:08,138 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 [2021-10-20 06:14:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:14:08,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:14:08,243 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:14:08,245 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-10-20 06:14:08,247 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:14:08,248 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-10-20 06:14:12,467 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 [2021-10-20 06:14:12,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:14:12,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078519052] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:14:12,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-20 06:14:12,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11, 11, 8, 8] total 31 [2021-10-20 06:14:12,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109081034] [2021-10-20 06:14:12,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-20 06:14:12,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:14:12,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-20 06:14:12,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=644, Unknown=8, NotChecked=162, Total=930 [2021-10-20 06:14:12,516 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) [2021-10-20 06:16:04,814 WARN L207 SmtUtils]: Spent 1.27 m on a formula simplification. DAG size of input: 188 DAG size of output: 98 [2021-10-20 06:16:35,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:16:35,744 INFO L93 Difference]: Finished difference Result 158 states and 202 transitions. [2021-10-20 06:16:35,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-20 06:16:35,745 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 [2021-10-20 06:16:35,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:16:35,747 INFO L225 Difference]: With dead ends: 158 [2021-10-20 06:16:35,748 INFO L226 Difference]: Without dead ends: 156 [2021-10-20 06:16:35,749 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 121256.0ms TimeCoverageRelationStatistics Valid=464, Invalid=2392, Unknown=18, NotChecked=318, Total=3192 [2021-10-20 06:16:35,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-20 06:16:35,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 63. [2021-10-20 06:16:35,762 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) [2021-10-20 06:16:35,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-10-20 06:16:35,763 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 18 [2021-10-20 06:16:35,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:16:35,763 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-10-20 06:16:35,763 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) [2021-10-20 06:16:35,764 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-10-20 06:16:35,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-20 06:16:35,765 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:16:35,765 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:16:35,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-10-20 06:16:36,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-20 06:16:36,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-10-20 06:16:36,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/cvc4 --incremental --print-success --lang smt [2021-10-20 06:16:36,380 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)] === [2021-10-20 06:16:36,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:16:36,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1938687340, now seen corresponding path program 1 times [2021-10-20 06:16:36,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:16:36,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1670920869] [2021-10-20 06:16:36,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:16:36,381 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:16:36,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:16:36,382 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:16:36,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-20 06:16:36,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:16:36,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-20 06:16:36,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:16:39,685 INFO L354 Elim1Store]: treesize reduction 92, result has 15.6 percent of original size [2021-10-20 06:16:39,686 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 [2021-10-20 06:16:40,733 INFO L354 Elim1Store]: treesize reduction 92, result has 15.6 percent of original size [2021-10-20 06:16:40,734 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 [2021-10-20 06:16:41,257 INFO L354 Elim1Store]: treesize reduction 224, result has 7.1 percent of original size [2021-10-20 06:16:41,257 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 [2021-10-20 06:16:41,587 INFO L354 Elim1Store]: treesize reduction 216, result has 12.6 percent of original size [2021-10-20 06:16:41,587 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 [2021-10-20 06:16:41,689 INFO L354 Elim1Store]: treesize reduction 344, result has 4.7 percent of original size [2021-10-20 06:16:41,689 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 [2021-10-20 06:16:41,828 INFO L354 Elim1Store]: treesize reduction 368, result has 9.6 percent of original size [2021-10-20 06:16:41,828 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 [2021-10-20 06:16:41,829 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-20 06:16:41,836 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-10-20 06:16:41,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-10-20 06:16:42,413 INFO L354 Elim1Store]: treesize reduction 262, result has 12.1 percent of original size [2021-10-20 06:16:42,413 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 [2021-10-20 06:16:42,525 INFO L354 Elim1Store]: treesize reduction 406, result has 12.9 percent of original size [2021-10-20 06:16:42,525 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 [2021-10-20 06:16:43,224 INFO L354 Elim1Store]: treesize reduction 311, result has 10.9 percent of original size [2021-10-20 06:16:43,224 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 [2021-10-20 06:16:43,349 INFO L354 Elim1Store]: treesize reduction 343, result has 11.8 percent of original size [2021-10-20 06:16:43,349 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 [2021-10-20 06:16:44,310 INFO L354 Elim1Store]: treesize reduction 304, result has 2.3 percent of original size [2021-10-20 06:16:44,310 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 [2021-10-20 06:16:44,395 INFO L354 Elim1Store]: treesize reduction 268, result has 2.5 percent of original size [2021-10-20 06:16:44,395 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 [2021-10-20 06:16:44,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:16:44,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:16:55,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:16:55,983 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:16:55,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1670920869] [2021-10-20 06:16:55,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1670920869] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:16:55,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1742553443] [2021-10-20 06:16:55,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:16:55,984 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-20 06:16:55,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/cvc4 [2021-10-20 06:16:55,993 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-20 06:16:56,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-10-20 06:16:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:16:56,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-20 06:16:56,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:16:56,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:16:56,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:16:56,791 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 [2021-10-20 06:16:56,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:16:56,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:16:56,798 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 [2021-10-20 06:16:56,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:16:57,064 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-10-20 06:16:57,064 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 [2021-10-20 06:16:57,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:16:57,303 INFO L354 Elim1Store]: treesize reduction 82, result has 27.4 percent of original size [2021-10-20 06:16:57,303 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 [2021-10-20 06:16:57,307 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:16:57,308 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 178 [2021-10-20 06:16:57,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:16:57,407 INFO L354 Elim1Store]: treesize reduction 224, result has 14.8 percent of original size [2021-10-20 06:16:57,408 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 [2021-10-20 06:16:57,409 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-20 06:16:57,415 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-10-20 06:16:57,415 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 [2021-10-20 06:16:57,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:16:57,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:16:57,996 INFO L354 Elim1Store]: treesize reduction 164, result has 14.1 percent of original size [2021-10-20 06:16:57,996 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 17 case distinctions, treesize of input 169 treesize of output 183 [2021-10-20 06:16:58,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:16:58,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:16:58,049 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-10-20 06:16:58,049 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 [2021-10-20 06:16:58,862 INFO L354 Elim1Store]: treesize reduction 347, result has 13.9 percent of original size [2021-10-20 06:16:58,863 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 [2021-10-20 06:16:58,961 INFO L354 Elim1Store]: treesize reduction 223, result has 13.9 percent of original size [2021-10-20 06:16:58,961 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 [2021-10-20 06:16:59,848 INFO L354 Elim1Store]: treesize reduction 214, result has 4.9 percent of original size [2021-10-20 06:16:59,848 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 [2021-10-20 06:16:59,911 INFO L354 Elim1Store]: treesize reduction 182, result has 3.7 percent of original size [2021-10-20 06:16:59,911 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 [2021-10-20 06:16:59,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:16:59,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:17:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:17:00,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1742553443] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:17:00,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855393364] [2021-10-20 06:17:00,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:17:00,332 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:17:00,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:17:00,338 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 06:17:00,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-20 06:17:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:17:00,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-20 06:17:00,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:17:04,669 INFO L354 Elim1Store]: treesize reduction 92, result has 15.6 percent of original size [2021-10-20 06:17:04,669 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 [2021-10-20 06:17:06,265 INFO L354 Elim1Store]: treesize reduction 224, result has 7.1 percent of original size [2021-10-20 06:17:06,265 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 [2021-10-20 06:17:07,648 INFO L354 Elim1Store]: treesize reduction 216, result has 12.6 percent of original size [2021-10-20 06:17:07,648 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 [2021-10-20 06:17:07,652 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:17:07,653 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 254 [2021-10-20 06:17:07,795 INFO L354 Elim1Store]: treesize reduction 615, result has 4.4 percent of original size [2021-10-20 06:17:07,796 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 3 case distinctions, treesize of input 254 treesize of output 168 [2021-10-20 06:17:07,912 INFO L354 Elim1Store]: treesize reduction 368, result has 9.6 percent of original size [2021-10-20 06:17:07,912 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 [2021-10-20 06:17:07,913 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-20 06:17:07,919 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-10-20 06:17:07,920 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 [2021-10-20 06:17:08,365 INFO L354 Elim1Store]: treesize reduction 262, result has 12.1 percent of original size [2021-10-20 06:17:08,365 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 [2021-10-20 06:17:08,497 INFO L354 Elim1Store]: treesize reduction 406, result has 12.9 percent of original size [2021-10-20 06:17:08,497 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 [2021-10-20 06:17:09,185 INFO L354 Elim1Store]: treesize reduction 311, result has 10.9 percent of original size [2021-10-20 06:17:09,185 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 [2021-10-20 06:17:09,307 INFO L354 Elim1Store]: treesize reduction 343, result has 11.8 percent of original size [2021-10-20 06:17:09,308 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 [2021-10-20 06:17:10,095 INFO L354 Elim1Store]: treesize reduction 304, result has 2.3 percent of original size [2021-10-20 06:17:10,095 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 [2021-10-20 06:17:10,178 INFO L354 Elim1Store]: treesize reduction 268, result has 2.5 percent of original size [2021-10-20 06:17:10,178 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 [2021-10-20 06:17:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:17:10,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:17:10,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:17:10,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855393364] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:17:10,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-20 06:17:10,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7, 9, 7, 9] total 17 [2021-10-20 06:17:10,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803193635] [2021-10-20 06:17:10,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-20 06:17:10,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:17:10,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-20 06:17:10,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-10-20 06:17:10,634 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) [2021-10-20 06:17:37,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:17:37,399 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2021-10-20 06:17:37,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-20 06:17:37,400 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 [2021-10-20 06:17:37,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:17:37,401 INFO L225 Difference]: With dead ends: 83 [2021-10-20 06:17:37,401 INFO L226 Difference]: Without dead ends: 72 [2021-10-20 06:17:37,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 12631.1ms TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-10-20 06:17:37,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-20 06:17:37,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2021-10-20 06:17:37,412 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) [2021-10-20 06:17:37,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2021-10-20 06:17:37,413 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 19 [2021-10-20 06:17:37,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:17:37,414 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2021-10-20 06:17:37,414 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) [2021-10-20 06:17:37,414 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2021-10-20 06:17:37,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-20 06:17:37,415 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:17:37,416 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:17:37,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-20 06:17:37,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-20 06:17:37,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-10-20 06:17:38,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/cvc4 --incremental --print-success --lang smt [2021-10-20 06:17:38,021 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)] === [2021-10-20 06:17:38,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:17:38,021 INFO L82 PathProgramCache]: Analyzing trace with hash -622338137, now seen corresponding path program 2 times [2021-10-20 06:17:38,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:17:38,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857700324] [2021-10-20 06:17:38,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-20 06:17:38,022 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:17:38,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:17:38,023 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:17:38,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-20 06:17:38,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-20 06:17:38,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-20 06:17:38,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-20 06:17:38,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:17:38,884 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:17:38,886 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 320 [2021-10-20 06:17:38,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:17:38,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:17:38,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:17:54,991 WARN L207 SmtUtils]: Spent 16.09 s on a formula simplification. DAG size of input: 66 DAG size of output: 23 [2021-10-20 06:17:54,991 INFO L354 Elim1Store]: treesize reduction 228, result has 14.3 percent of original size [2021-10-20 06:17:54,992 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 [2021-10-20 06:17:55,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:17:55,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:18:06,942 WARN L207 SmtUtils]: Spent 11.94 s on a formula simplification. DAG size of input: 82 DAG size of output: 28 [2021-10-20 06:18:06,943 INFO L354 Elim1Store]: treesize reduction 284, result has 12.3 percent of original size [2021-10-20 06:18:06,943 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 [2021-10-20 06:18:06,949 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:18:06,951 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 430 [2021-10-20 06:18:06,955 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:18:06,956 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 412 [2021-10-20 06:18:09,938 INFO L354 Elim1Store]: treesize reduction 486, result has 9.5 percent of original size [2021-10-20 06:18:09,939 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 [2021-10-20 06:18:09,943 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:18:09,944 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 310 [2021-10-20 06:18:09,945 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-20 06:18:09,948 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:18:09,949 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 315 [2021-10-20 06:18:09,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:18:09,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:18:09,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:18:10,368 INFO L354 Elim1Store]: treesize reduction 1283, result has 6.1 percent of original size [2021-10-20 06:18:10,368 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 [2021-10-20 06:18:10,423 INFO L354 Elim1Store]: treesize reduction 132, result has 18.0 percent of original size [2021-10-20 06:18:10,423 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 [2021-10-20 06:18:10,478 INFO L354 Elim1Store]: treesize reduction 119, result has 14.4 percent of original size [2021-10-20 06:18:10,478 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 [2021-10-20 06:18:10,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:18:10,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:18:10,973 INFO L354 Elim1Store]: treesize reduction 290, result has 13.9 percent of original size [2021-10-20 06:18:10,973 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 [2021-10-20 06:18:10,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:18:10,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:18:11,192 INFO L354 Elim1Store]: treesize reduction 450, result has 13.6 percent of original size [2021-10-20 06:18:11,192 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 [2021-10-20 06:18:11,261 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-10-20 06:18:11,261 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 [2021-10-20 06:18:11,329 INFO L354 Elim1Store]: treesize reduction 124, result has 19.0 percent of original size [2021-10-20 06:18:11,330 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 [2021-10-20 06:18:11,331 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-20 06:18:11,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:18:11,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:18:12,001 INFO L354 Elim1Store]: treesize reduction 352, result has 9.7 percent of original size [2021-10-20 06:18:12,001 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 [2021-10-20 06:18:12,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:18:12,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:18:12,164 INFO L354 Elim1Store]: treesize reduction 536, result has 10.4 percent of original size [2021-10-20 06:18:12,165 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 [2021-10-20 06:18:12,233 INFO L354 Elim1Store]: treesize reduction 124, result has 19.0 percent of original size [2021-10-20 06:18:12,234 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 [2021-10-20 06:18:14,334 INFO L354 Elim1Store]: treesize reduction 201, result has 2.0 percent of original size [2021-10-20 06:18:14,335 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 [2021-10-20 06:18:14,416 INFO L354 Elim1Store]: treesize reduction 204, result has 0.5 percent of original size [2021-10-20 06:18:14,417 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 [2021-10-20 06:18:14,576 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-10-20 06:18:14,577 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 [2021-10-20 06:18:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-20 06:18:14,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:18:15,000 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:18:15,000 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-10-20 06:18:15,002 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:18:15,003 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-10-20 06:18:15,276 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:18:15,277 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-10-20 06:18:17,329 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 [2021-10-20 06:18:17,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-20 06:18:17,384 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:18:17,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857700324] [2021-10-20 06:18:17,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857700324] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:18:17,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1577621883] [2021-10-20 06:18:17,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-20 06:18:17,385 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-20 06:18:17,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/cvc4 [2021-10-20 06:18:17,389 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-20 06:18:17,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-10-20 06:18:18,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-20 06:18:18,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-20 06:18:18,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-20 06:18:18,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:18:18,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:18:18,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:18:18,411 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 [2021-10-20 06:18:18,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:18:22,837 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-10-20 06:18:22,838 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 [2021-10-20 06:18:22,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:18:29,517 WARN L207 SmtUtils]: Spent 6.65 s on a formula simplification. DAG size of input: 45 DAG size of output: 22 [2021-10-20 06:18:29,517 INFO L354 Elim1Store]: treesize reduction 82, result has 27.4 percent of original size [2021-10-20 06:18:29,517 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 [2021-10-20 06:18:29,522 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:18:29,524 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 376 [2021-10-20 06:18:29,527 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:18:29,529 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 381 [2021-10-20 06:18:29,532 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:18:29,533 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 363 [2021-10-20 06:18:30,242 INFO L354 Elim1Store]: treesize reduction 144, result has 19.1 percent of original size [2021-10-20 06:18:30,242 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 [2021-10-20 06:18:30,242 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-20 06:18:30,959 INFO L354 Elim1Store]: treesize reduction 119, result has 14.4 percent of original size [2021-10-20 06:18:30,959 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 [2021-10-20 06:18:30,966 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:18:30,967 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 269 [2021-10-20 06:18:30,970 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:18:30,971 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 274 [2021-10-20 06:18:30,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:18:30,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:18:30,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:18:31,085 INFO L354 Elim1Store]: treesize reduction 268, result has 15.7 percent of original size [2021-10-20 06:18:31,086 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 [2021-10-20 06:18:31,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:18:31,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:18:31,639 INFO L354 Elim1Store]: treesize reduction 318, result has 17.8 percent of original size [2021-10-20 06:18:31,639 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 [2021-10-20 06:18:31,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:18:31,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:18:31,834 INFO L354 Elim1Store]: treesize reduction 198, result has 18.5 percent of original size [2021-10-20 06:18:31,835 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 [2021-10-20 06:18:31,885 INFO L354 Elim1Store]: treesize reduction 112, result has 19.4 percent of original size [2021-10-20 06:18:31,885 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 [2021-10-20 06:18:31,936 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-10-20 06:18:31,936 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 [2021-10-20 06:18:31,942 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-20 06:18:32,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:18:32,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:18:32,649 INFO L354 Elim1Store]: treesize reduction 258, result has 12.2 percent of original size [2021-10-20 06:18:32,649 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 [2021-10-20 06:18:32,712 INFO L354 Elim1Store]: treesize reduction 112, result has 19.4 percent of original size [2021-10-20 06:18:32,713 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 [2021-10-20 06:18:32,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:18:32,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:18:32,848 INFO L354 Elim1Store]: treesize reduction 402, result has 13.0 percent of original size [2021-10-20 06:18:32,848 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 [2021-10-20 06:18:34,887 INFO L354 Elim1Store]: treesize reduction 117, result has 3.3 percent of original size [2021-10-20 06:18:34,887 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 [2021-10-20 06:18:34,923 INFO L354 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2021-10-20 06:18:34,923 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 [2021-10-20 06:18:35,133 INFO L354 Elim1Store]: treesize reduction 33, result has 10.8 percent of original size [2021-10-20 06:18:35,133 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 [2021-10-20 06:18:35,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-20 06:18:35,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:18:35,240 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:18:35,241 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-10-20 06:18:35,243 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:18:35,248 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-10-20 06:18:35,512 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:18:35,513 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 64 [2021-10-20 06:18:37,559 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 [2021-10-20 06:18:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-20 06:18:37,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1577621883] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:18:37,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575428006] [2021-10-20 06:18:37,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-20 06:18:37,633 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:18:37,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:18:37,634 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 06:18:37,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-20 06:18:44,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-20 06:18:44,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-20 06:18:44,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-20 06:18:44,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:19:00,689 WARN L207 SmtUtils]: Spent 16.20 s on a formula simplification. DAG size of input: 34 DAG size of output: 13 [2021-10-20 06:19:00,690 INFO L354 Elim1Store]: treesize reduction 92, result has 15.6 percent of original size [2021-10-20 06:19:00,690 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 [2021-10-20 06:19:11,949 WARN L207 SmtUtils]: Spent 11.25 s on a formula simplification. DAG size of input: 59 DAG size of output: 13 [2021-10-20 06:19:11,949 INFO L354 Elim1Store]: treesize reduction 224, result has 7.1 percent of original size [2021-10-20 06:19:11,950 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 [2021-10-20 06:19:20,029 WARN L207 SmtUtils]: Spent 8.07 s on a formula simplification. DAG size of input: 67 DAG size of output: 22 [2021-10-20 06:19:20,030 INFO L354 Elim1Store]: treesize reduction 216, result has 12.6 percent of original size [2021-10-20 06:19:20,030 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 [2021-10-20 06:19:24,566 INFO L354 Elim1Store]: treesize reduction 119, result has 14.4 percent of original size [2021-10-20 06:19:24,567 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 [2021-10-20 06:19:24,574 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:19:24,575 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 422 [2021-10-20 06:19:25,771 INFO L354 Elim1Store]: treesize reduction 615, result has 4.4 percent of original size [2021-10-20 06:19:25,771 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 [2021-10-20 06:19:25,772 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-20 06:19:25,777 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 [2021-10-20 06:19:25,781 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:19:25,782 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 270 [2021-10-20 06:19:25,785 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:19:25,787 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 275 [2021-10-20 06:19:25,838 INFO L354 Elim1Store]: treesize reduction 100, result has 18.7 percent of original size [2021-10-20 06:19:25,839 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 [2021-10-20 06:19:25,946 INFO L354 Elim1Store]: treesize reduction 368, result has 9.6 percent of original size [2021-10-20 06:19:25,946 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 [2021-10-20 06:19:26,612 INFO L354 Elim1Store]: treesize reduction 280, result has 13.8 percent of original size [2021-10-20 06:19:26,613 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 [2021-10-20 06:19:26,848 INFO L354 Elim1Store]: treesize reduction 424, result has 14.0 percent of original size [2021-10-20 06:19:26,848 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 [2021-10-20 06:19:26,917 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-10-20 06:19:26,918 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 [2021-10-20 06:19:26,977 INFO L354 Elim1Store]: treesize reduction 112, result has 19.4 percent of original size [2021-10-20 06:19:26,977 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 [2021-10-20 06:19:26,979 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-20 06:19:27,864 INFO L354 Elim1Store]: treesize reduction 340, result has 9.6 percent of original size [2021-10-20 06:19:27,865 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 [2021-10-20 06:19:28,055 INFO L354 Elim1Store]: treesize reduction 508, result has 10.6 percent of original size [2021-10-20 06:19:28,056 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 [2021-10-20 06:19:28,118 INFO L354 Elim1Store]: treesize reduction 112, result has 19.4 percent of original size [2021-10-20 06:19:28,118 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 [2021-10-20 06:19:30,485 INFO L354 Elim1Store]: treesize reduction 204, result has 0.5 percent of original size [2021-10-20 06:19:30,485 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 [2021-10-20 06:19:30,538 INFO L354 Elim1Store]: treesize reduction 204, result has 0.5 percent of original size [2021-10-20 06:19:30,538 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 [2021-10-20 06:19:30,699 INFO L354 Elim1Store]: treesize reduction 33, result has 10.8 percent of original size [2021-10-20 06:19:30,699 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 [2021-10-20 06:19:30,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-20 06:19:30,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:19:30,807 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:19:30,808 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-10-20 06:19:30,812 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:19:30,813 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-10-20 06:19:31,107 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:19:31,108 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 64 [2021-10-20 06:19:33,160 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 [2021-10-20 06:19:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-20 06:19:33,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575428006] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:19:33,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-20 06:19:33,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 25 [2021-10-20 06:19:33,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544727071] [2021-10-20 06:19:33,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-20 06:19:33,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:19:33,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-20 06:19:33,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=395, Unknown=4, NotChecked=126, Total=600 [2021-10-20 06:19:33,216 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) [2021-10-20 06:19:52,906 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 [2021-10-20 06:20:12,752 WARN L207 SmtUtils]: Spent 10.29 s on a formula simplification that was a NOOP. DAG size: 60 [2021-10-20 06:20:17,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:20:17,362 INFO L93 Difference]: Finished difference Result 144 states and 177 transitions. [2021-10-20 06:20:17,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-20 06:20:17,363 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 [2021-10-20 06:20:17,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:20:17,364 INFO L225 Difference]: With dead ends: 144 [2021-10-20 06:20:17,364 INFO L226 Difference]: Without dead ends: 110 [2021-10-20 06:20:17,365 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 28152.4ms TimeCoverageRelationStatistics Valid=148, Invalid=618, Unknown=6, NotChecked=220, Total=992 [2021-10-20 06:20:17,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-20 06:20:17,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 75. [2021-10-20 06:20:17,380 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) [2021-10-20 06:20:17,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2021-10-20 06:20:17,380 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 20 [2021-10-20 06:20:17,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:20:17,381 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2021-10-20 06:20:17,381 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) [2021-10-20 06:20:17,381 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2021-10-20 06:20:17,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-20 06:20:17,382 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:20:17,382 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:20:17,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-10-20 06:20:17,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-10-20 06:20:17,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-10-20 06:20:17,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:20:17,987 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)] === [2021-10-20 06:20:17,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:20:17,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1643406491, now seen corresponding path program 1 times [2021-10-20 06:20:17,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:20:17,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838871253] [2021-10-20 06:20:17,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:20:17,988 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:20:17,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:20:17,989 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:20:17,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-20 06:20:18,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:20:18,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-20 06:20:18,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:20:18,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:20:18,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:20:18,996 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 [2021-10-20 06:20:25,143 WARN L207 SmtUtils]: Spent 6.14 s on a formula simplification. DAG size of input: 25 DAG size of output: 9 [2021-10-20 06:20:25,143 INFO L354 Elim1Store]: treesize reduction 47, result has 25.4 percent of original size [2021-10-20 06:20:25,144 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 [2021-10-20 06:20:25,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:20:25,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:20:25,155 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 [2021-10-20 06:20:25,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:20:25,910 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-10-20 06:20:25,911 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 [2021-10-20 06:20:25,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:20:26,727 INFO L354 Elim1Store]: treesize reduction 82, result has 27.4 percent of original size [2021-10-20 06:20:26,728 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 [2021-10-20 06:20:26,734 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:20:26,735 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 287 [2021-10-20 06:20:26,736 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-20 06:20:26,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:20:26,884 INFO L354 Elim1Store]: treesize reduction 224, result has 14.8 percent of original size [2021-10-20 06:20:26,884 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 [2021-10-20 06:20:26,888 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:20:26,889 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 232 [2021-10-20 06:20:26,900 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 [2021-10-20 06:20:27,187 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-10-20 06:20:27,188 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 [2021-10-20 06:20:27,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:20:27,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:20:27,336 INFO L354 Elim1Store]: treesize reduction 198, result has 18.5 percent of original size [2021-10-20 06:20:27,337 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 [2021-10-20 06:20:27,401 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-10-20 06:20:27,404 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 [2021-10-20 06:20:27,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:20:27,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:20:27,540 INFO L354 Elim1Store]: treesize reduction 318, result has 17.8 percent of original size [2021-10-20 06:20:27,540 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 [2021-10-20 06:20:27,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:20:27,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:20:28,165 INFO L354 Elim1Store]: treesize reduction 258, result has 12.2 percent of original size [2021-10-20 06:20:28,166 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 [2021-10-20 06:20:28,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:20:28,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:20:28,304 INFO L354 Elim1Store]: treesize reduction 402, result has 13.0 percent of original size [2021-10-20 06:20:28,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2021-10-20 06:20:28,336 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-10-20 06:20:28,336 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 [2021-10-20 06:20:34,711 INFO L354 Elim1Store]: treesize reduction 217, result has 3.6 percent of original size [2021-10-20 06:20:34,711 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 [2021-10-20 06:20:34,775 INFO L354 Elim1Store]: treesize reduction 194, result has 1.5 percent of original size [2021-10-20 06:20:34,775 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 [2021-10-20 06:20:34,924 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-20 06:20:34,925 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 [2021-10-20 06:20:34,984 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:20:34,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:20:35,372 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:20:35,374 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-10-20 06:20:35,376 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:20:35,377 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-10-20 06:20:35,701 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:20:35,701 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 132 [2021-10-20 06:20:37,749 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 [2021-10-20 06:20:37,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:20:37,799 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:20:37,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838871253] [2021-10-20 06:20:37,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [838871253] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:20:37,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [515836282] [2021-10-20 06:20:37,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:20:37,800 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-20 06:20:37,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/cvc4 [2021-10-20 06:20:37,801 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-20 06:20:37,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-10-20 06:20:39,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:20:39,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-20 06:20:39,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:21:01,225 WARN L207 SmtUtils]: Spent 22.05 s on a formula simplification. DAG size of input: 25 DAG size of output: 9 [2021-10-20 06:21:01,225 INFO L354 Elim1Store]: treesize reduction 47, result has 25.4 percent of original size [2021-10-20 06:21:01,225 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 [2021-10-20 06:21:01,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:21:01,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:21:01,243 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 [2021-10-20 06:21:01,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:21:03,412 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-10-20 06:21:03,412 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 [2021-10-20 06:21:03,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:21:06,104 INFO L354 Elim1Store]: treesize reduction 82, result has 27.4 percent of original size [2021-10-20 06:21:06,105 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 [2021-10-20 06:21:06,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:21:06,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:21:06,114 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 [2021-10-20 06:21:06,118 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:21:06,119 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 287 [2021-10-20 06:21:06,119 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-20 06:21:06,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:21:06,271 INFO L354 Elim1Store]: treesize reduction 224, result has 14.8 percent of original size [2021-10-20 06:21:06,271 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 [2021-10-20 06:21:06,276 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 [2021-10-20 06:21:06,280 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 [2021-10-20 06:21:06,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:21:06,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:21:06,525 INFO L354 Elim1Store]: treesize reduction 96, result has 18.6 percent of original size [2021-10-20 06:21:06,526 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 [2021-10-20 06:21:06,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:21:06,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:21:06,614 INFO L354 Elim1Store]: treesize reduction 180, result has 15.9 percent of original size [2021-10-20 06:21:06,614 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 [2021-10-20 06:21:06,620 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 [2021-10-20 06:21:06,667 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-10-20 06:21:06,667 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 [2021-10-20 06:21:07,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:21:07,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:21:07,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:21:07,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:21:07,270 INFO L354 Elim1Store]: treesize reduction 108, result has 12.2 percent of original size [2021-10-20 06:21:07,270 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 [2021-10-20 06:21:07,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:21:07,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:21:07,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:21:07,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:21:07,338 INFO L354 Elim1Store]: treesize reduction 204, result has 11.7 percent of original size [2021-10-20 06:21:07,338 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 [2021-10-20 06:21:07,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:21:07,346 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 [2021-10-20 06:21:13,996 INFO L354 Elim1Store]: treesize reduction 242, result has 1.2 percent of original size [2021-10-20 06:21:13,996 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 [2021-10-20 06:21:14,551 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-10-20 06:21:14,551 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 [2021-10-20 06:21:14,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:21:14,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:21:16,097 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:21:16,098 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 203 [2021-10-20 06:21:16,102 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:21:16,102 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 253 [2021-10-20 06:21:16,430 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:21:16,431 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 296 [2021-10-20 06:21:18,641 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 [2021-10-20 06:21:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:21:18,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [515836282] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:21:18,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245832224] [2021-10-20 06:21:18,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:21:18,704 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:21:18,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:21:18,706 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 06:21:18,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-20 06:21:19,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:21:19,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-20 06:21:19,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:21:27,078 WARN L207 SmtUtils]: Spent 7.26 s on a formula simplification. DAG size of input: 33 DAG size of output: 12 [2021-10-20 06:21:27,078 INFO L354 Elim1Store]: treesize reduction 92, result has 15.6 percent of original size [2021-10-20 06:21:27,078 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 [2021-10-20 06:21:33,842 WARN L207 SmtUtils]: Spent 6.76 s on a formula simplification. DAG size of input: 25 DAG size of output: 9 [2021-10-20 06:21:33,843 INFO L354 Elim1Store]: treesize reduction 47, result has 25.4 percent of original size [2021-10-20 06:21:33,843 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 [2021-10-20 06:21:36,664 INFO L354 Elim1Store]: treesize reduction 92, result has 15.6 percent of original size [2021-10-20 06:21:36,665 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 [2021-10-20 06:21:38,155 INFO L354 Elim1Store]: treesize reduction 224, result has 7.1 percent of original size [2021-10-20 06:21:38,155 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 [2021-10-20 06:21:39,219 INFO L354 Elim1Store]: treesize reduction 216, result has 12.6 percent of original size [2021-10-20 06:21:39,219 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 [2021-10-20 06:21:39,223 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:21:39,224 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 287 [2021-10-20 06:21:39,225 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-20 06:21:39,229 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 [2021-10-20 06:21:39,238 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:21:39,239 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-10-20 06:21:39,377 INFO L354 Elim1Store]: treesize reduction 800, result has 4.6 percent of original size [2021-10-20 06:21:39,378 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 [2021-10-20 06:21:40,085 INFO L354 Elim1Store]: treesize reduction 280, result has 13.8 percent of original size [2021-10-20 06:21:40,085 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 [2021-10-20 06:21:40,312 INFO L354 Elim1Store]: treesize reduction 424, result has 14.0 percent of original size [2021-10-20 06:21:40,313 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 [2021-10-20 06:21:40,372 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-10-20 06:21:40,372 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 [2021-10-20 06:21:40,405 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-10-20 06:21:40,406 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 [2021-10-20 06:21:40,407 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-20 06:21:41,345 INFO L354 Elim1Store]: treesize reduction 340, result has 9.6 percent of original size [2021-10-20 06:21:41,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2021-10-20 06:21:41,518 INFO L354 Elim1Store]: treesize reduction 508, result has 10.6 percent of original size [2021-10-20 06:21:41,519 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 [2021-10-20 06:21:41,550 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-10-20 06:21:41,551 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 [2021-10-20 06:21:55,016 INFO L354 Elim1Store]: treesize reduction 308, result has 1.0 percent of original size [2021-10-20 06:21:55,016 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 [2021-10-20 06:21:55,124 INFO L354 Elim1Store]: treesize reduction 280, result has 1.1 percent of original size [2021-10-20 06:21:55,124 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 [2021-10-20 06:21:55,169 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-20 06:21:55,170 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 [2021-10-20 06:21:55,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:21:55,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:21:55,315 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:21:55,316 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-10-20 06:21:55,319 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:21:55,320 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-10-20 06:21:57,674 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:21:57,675 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 132 [2021-10-20 06:21:59,718 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 [2021-10-20 06:21:59,765 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:21:59,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245832224] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:21:59,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-20 06:21:59,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10, 13, 9, 9] total 40 [2021-10-20 06:21:59,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51678676] [2021-10-20 06:21:59,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-20 06:21:59,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:21:59,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-20 06:21:59,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1165, Unknown=10, NotChecked=216, Total=1560 [2021-10-20 06:21:59,768 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) [2021-10-20 06:22:15,885 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse19 (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~bucket~0.base))) (let ((.cse9 (select .cse19 c_ULTIMATE.start_main_~bucket~0.offset))) (let ((.cse10 (select |c_#memory_$Pointer$.base| .cse9))) (let ((.cse2 (select .cse10 (_ bv0 32)))) (let ((.cse0 (not (= c_ULTIMATE.start_main_~bcki~0.base (_ bv0 32)))) (.cse1 (select |c_#memory_$Pointer$.base| .cse2)) (.cse3 (select |c_#memory_$Pointer$.offset| .cse2)) (.cse18 (select |c_#memory_$Pointer$.offset| .cse9)) (.cse16 (select |c_#memory_int| c_ULTIMATE.start_main_~item~0.base)) (.cse17 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~item~0.offset)) (.cse21 (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~bucket~0.base)) (.cse20 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~bucket~0.offset))) (and (or (not (= c_ULTIMATE.start_main_~bcki~0.offset (_ bv0 32))) .cse0) (= (select .cse1 (_ bv4 32)) (_ bv0 32)) (= c_ULTIMATE.start_main_~bucket~0.offset (_ bv0 32)) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| .cse2))) (= (_ bv2 32) (select (select |c_#memory_int| .cse2) (_ bv8 32))) (= (select .cse3 (_ bv4 32)) (_ bv0 32)) (forall ((v_ULTIMATE.start_main_~item~0.base_64 (_ BitVec 32)) (v_ULTIMATE.start_main_~item~0.offset_64 (_ BitVec 32)) (v_DerPreprocessor_46 (_ BitVec 32)) (v_DerPreprocessor_47 (_ BitVec 32)) (v_DerPreprocessor_45 (_ BitVec 32))) (or (= (_ bv2 32) (let ((.cse4 (bvadd (_ bv4 32) v_ULTIMATE.start_main_~item~0.offset_64))) (let ((.cse8 (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_64 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_64) v_ULTIMATE.start_main_~item~0.offset_64 (_ bv0 32)) .cse4 v_DerPreprocessor_46))) (.cse5 (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_64 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_64) v_ULTIMATE.start_main_~item~0.offset_64 (_ bv0 32)) .cse4 v_DerPreprocessor_45)))) (let ((.cse6 (select (select .cse5 c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset)) (.cse7 (select (select .cse8 c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset))) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_64 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_64) v_ULTIMATE.start_main_~item~0.offset_64 v_DerPreprocessor_47) .cse4 (_ bv2 32))) (select (select .cse5 .cse6) .cse7)) (bvadd (_ bv8 32) (select (select .cse8 .cse6) .cse7))))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~item~0.base_64)))))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| .cse9)) (_ bv1 1))) (not (= .cse2 c_ULTIMATE.start_main_~bucket~0.base)) (= (select .cse10 (_ bv4 32)) (_ bv0 32)) (forall ((v_ULTIMATE.start_main_~item~0.base_68 (_ BitVec 32)) (v_DerPreprocessor_46 (_ BitVec 32)) (v_DerPreprocessor_45 (_ BitVec 32)) (v_DerPreprocessor_56 (_ BitVec 32)) (v_ULTIMATE.start_main_~item~0.offset_68 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~item~0.base_68)))) (= (let ((.cse11 (bvadd (_ bv4 32) v_ULTIMATE.start_main_~item~0.offset_68))) (let ((.cse15 (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_68 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_68) v_ULTIMATE.start_main_~item~0.offset_68 (_ bv0 32)) .cse11 v_DerPreprocessor_46))) (.cse12 (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_68 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_68) v_ULTIMATE.start_main_~item~0.offset_68 (_ bv0 32)) .cse11 v_DerPreprocessor_45)))) (let ((.cse13 (select (select .cse12 c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset)) (.cse14 (select (select .cse15 c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset))) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_68 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~item~0.base_68) v_ULTIMATE.start_main_~item~0.offset_68 v_DerPreprocessor_56) .cse11 (_ bv2 32))) (select (select .cse12 .cse13) .cse14)) (bvadd (_ bv8 32) (select (select .cse15 .cse13) .cse14)))))) (_ bv2 32)))) (or (not (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~bcki~0.base) (_ bv8 32)) (select .cse16 .cse17))) .cse0) (= (select .cse1 (_ bv0 32)) (_ bv0 32)) (not (= .cse2 .cse9)) (= (select .cse3 (_ bv0 32)) (_ bv0 32)) (= (select .cse18 (_ bv4 32)) (_ bv0 32)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~bucket~0.base)) (_ bv1 1))) (= (select .cse18 (_ bv0 32)) (_ bv0 32)) (= (select .cse19 .cse20) (_ bv0 32)) (= (select .cse21 c_ULTIMATE.start_main_~bucket~0.offset) (_ bv0 32)) (or (forall ((v_DerPreprocessor_50 (_ BitVec 32)) (v_DerPreprocessor_49 (_ BitVec 32))) (let ((.cse29 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~item~0.offset))) (let ((.cse28 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~item~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~item~0.base) .cse29 v_DerPreprocessor_50))) (.cse25 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~item~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~item~0.base) .cse29 v_DerPreprocessor_49)))) (let ((.cse23 (select (select .cse25 c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset)) (.cse24 (select (select .cse28 c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset))) (let ((.cse22 (store |c_#memory_int| c_ULTIMATE.start_main_~item~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~item~0.base) .cse29 (_ bv2 32)))) (.cse26 (select (select .cse25 .cse23) .cse24)) (.cse27 (select (select .cse28 .cse23) .cse24))) (or (= (_ bv2 32) (select (select .cse22 .cse23) (bvadd (_ bv8 32) .cse24))) (not (= (select (select .cse25 .cse26) .cse27) (_ bv0 32))) (= (_ bv2 32) (select (select .cse22 .cse26) (bvadd .cse27 (_ bv8 32)))))))))) (not (= (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~item~0.base (store .cse16 .cse17 (_ bv2 32))) (_ bv0 32)) (_ bv8 32)) (_ bv2 32)))) (= (select .cse21 .cse20) (_ bv0 32)) (forall ((v_DerPreprocessor_50 (_ BitVec 32)) (v_ULTIMATE.start_main_~item~0.base_66 (_ BitVec 32)) (v_DerPreprocessor_51 (_ BitVec 32)) (v_DerPreprocessor_49 (_ BitVec 32))) (let ((.cse36 (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_66 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~item~0.base_66) (_ bv0 32) (_ bv0 32)) (_ bv4 32) v_DerPreprocessor_50))) (.cse35 (store |c_#memory_$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 ((.cse31 (select (select .cse35 c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset)) (.cse32 (select (select .cse36 c_ULTIMATE.start_main_~bucket~0.base) c_ULTIMATE.start_main_~bucket~0.offset))) (let ((.cse30 (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)))) (.cse33 (select (select .cse35 .cse31) .cse32)) (.cse34 (select (select .cse36 .cse31) .cse32))) (or (not (= (_ bv2 32) (select (select .cse30 (_ bv0 32)) (_ bv8 32)))) (= (select (select .cse30 .cse31) (bvadd (_ bv8 32) .cse32)) (_ bv2 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~item~0.base_66)))) (= (_ bv2 32) (select (select .cse30 .cse33) (bvadd .cse34 (_ bv8 32)))) (not (= (select (select .cse35 .cse33) .cse34) (_ bv0 32)))))))))))))) is different from false [2021-10-20 06:22:35,998 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 [2021-10-20 06:23:16,613 WARN L207 SmtUtils]: Spent 16.48 s on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-10-20 06:24:08,712 WARN L207 SmtUtils]: Spent 18.49 s on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-10-20 06:24:17,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:24:17,100 INFO L93 Difference]: Finished difference Result 158 states and 198 transitions. [2021-10-20 06:24:17,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-20 06:24:17,102 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 [2021-10-20 06:24:17,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:24:17,103 INFO L225 Difference]: With dead ends: 158 [2021-10-20 06:24:17,103 INFO L226 Difference]: Without dead ends: 124 [2021-10-20 06:24:17,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 111170.3ms TimeCoverageRelationStatistics Valid=478, Invalid=2385, Unknown=19, NotChecked=540, Total=3422 [2021-10-20 06:24:17,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-20 06:24:17,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 73. [2021-10-20 06:24:17,121 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) [2021-10-20 06:24:17,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2021-10-20 06:24:17,123 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 20 [2021-10-20 06:24:17,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:24:17,123 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2021-10-20 06:24:17,123 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) [2021-10-20 06:24:17,124 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2021-10-20 06:24:17,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-20 06:24:17,125 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:24:17,125 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] [2021-10-20 06:24:17,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-20 06:24:17,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-10-20 06:24:17,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-20 06:24:17,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:24:17,733 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)] === [2021-10-20 06:24:17,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:24:17,733 INFO L82 PathProgramCache]: Analyzing trace with hash -699796204, now seen corresponding path program 1 times [2021-10-20 06:24:17,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:24:17,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1208690916] [2021-10-20 06:24:17,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:24:17,734 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:24:17,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:24:17,735 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:24:17,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-20 06:24:18,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-20 06:24:18,881 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-20 06:24:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-20 06:24:19,174 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-20 06:24:19,175 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-20 06:24:19,176 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 06:24:19,178 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 06:24:19,178 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 06:24:19,178 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 06:24:19,179 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 06:24:19,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-20 06:24:19,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:24:19,392 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-20 06:24:19,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:24:19 BoogieIcfgContainer [2021-10-20 06:24:19,452 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-20 06:24:19,452 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-20 06:24:19,453 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-20 06:24:19,453 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-20 06:24:19,453 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:10:50" (3/4) ... [2021-10-20 06:24:19,455 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-20 06:24:19,525 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/witness.graphml [2021-10-20 06:24:19,526 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-20 06:24:19,526 INFO L168 Benchmark]: Toolchain (without parser) took 812362.80 ms. Allocated memory was 62.9 MB in the beginning and 98.6 MB in the end (delta: 35.7 MB). Free memory was 42.2 MB in the beginning and 24.9 MB in the end (delta: 17.3 MB). Peak memory consumption was 51.3 MB. Max. memory is 16.1 GB. [2021-10-20 06:24:19,527 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 62.9 MB. Free memory is still 44.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 06:24:19,527 INFO L168 Benchmark]: CACSL2BoogieTranslator took 474.53 ms. Allocated memory is still 62.9 MB. Free memory was 42.1 MB in the beginning and 39.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-20 06:24:19,527 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.35 ms. Allocated memory is still 62.9 MB. Free memory was 38.9 MB in the beginning and 36.7 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 06:24:19,527 INFO L168 Benchmark]: Boogie Preprocessor took 39.38 ms. Allocated memory is still 62.9 MB. Free memory was 36.7 MB in the beginning and 34.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-20 06:24:19,528 INFO L168 Benchmark]: RCFGBuilder took 2546.40 ms. Allocated memory was 62.9 MB in the beginning and 98.6 MB in the end (delta: 35.7 MB). Free memory was 34.6 MB in the beginning and 65.1 MB in the end (delta: -30.4 MB). Peak memory consumption was 12.2 MB. Max. memory is 16.1 GB. [2021-10-20 06:24:19,528 INFO L168 Benchmark]: TraceAbstraction took 809172.56 ms. Allocated memory is still 98.6 MB. Free memory was 64.6 MB in the beginning and 27.5 MB in the end (delta: 37.1 MB). Peak memory consumption was 37.4 MB. Max. memory is 16.1 GB. [2021-10-20 06:24:19,529 INFO L168 Benchmark]: Witness Printer took 73.43 ms. Allocated memory is still 98.6 MB. Free memory was 27.5 MB in the beginning and 24.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 06:24:19,536 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 62.9 MB. Free memory is still 44.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 474.53 ms. Allocated memory is still 62.9 MB. Free memory was 42.1 MB in the beginning and 39.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 50.35 ms. Allocated memory is still 62.9 MB. Free memory was 38.9 MB in the beginning and 36.7 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.38 ms. Allocated memory is still 62.9 MB. Free memory was 36.7 MB in the beginning and 34.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2546.40 ms. Allocated memory was 62.9 MB in the beginning and 98.6 MB in the end (delta: 35.7 MB). Free memory was 34.6 MB in the beginning and 65.1 MB in the end (delta: -30.4 MB). Peak memory consumption was 12.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 809172.56 ms. Allocated memory is still 98.6 MB. Free memory was 64.6 MB in the beginning and 27.5 MB in the end (delta: 37.1 MB). Peak memory consumption was 37.4 MB. Max. memory is 16.1 GB. * Witness Printer took 73.43 ms. Allocated memory is still 98.6 MB. Free memory was 27.5 MB in the beginning and 24.9 MB in the end (delta: 2.6 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: 809057.6ms, OverallIterations: 11, TraceHistogramMax: 4, EmptinessCheckTime: 19.5ms, AutomataDifference: 466602.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 368 SDtfs, 1204 SDslu, 1699 SDs, 0 SdLazy, 2712 SolverSat, 340 SolverUnsat, 90 SolverUnknown, 0 SolverNotchecked, 190678.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 689 GetRequests, 461 SyntacticMatches, 17 SemanticMatches, 211 ConstructedPredicates, 16 IntricatePredicates, 1 DeprecatedPredicates, 1875 ImplicationChecksByTransitivity, 352921.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=9, InterpolantAutomatonStates: 116, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 129.8ms AutomataMinimizationTime, 10 MinimizatonAttempts, 293 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 246.7ms SsaConstructionTime, 8399.0ms SatisfiabilityAnalysisTime, 319777.7ms 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! [2021-10-20 06:24:19,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614a3ed9-d4ac-464c-8031-a6de3f18e892/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...