./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs --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 64bit --witnessprinter.graph.data.programhash b83c28af83745ba79af1b1ebec4b495db7aa2efb3702685bbdc4b86421ef4c0a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:32:30,275 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:32:30,278 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:32:30,335 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:32:30,336 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:32:30,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:32:30,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:32:30,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:32:30,353 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:32:30,360 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:32:30,362 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:32:30,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:32:30,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:32:30,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:32:30,371 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:32:30,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:32:30,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:32:30,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:32:30,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:32:30,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:32:30,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:32:30,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:32:30,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:32:30,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:32:30,417 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:32:30,418 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:32:30,419 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:32:30,421 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:32:30,422 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:32:30,424 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:32:30,425 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:32:30,426 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:32:30,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:32:30,430 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:32:30,432 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:32:30,432 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:32:30,433 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:32:30,434 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:32:30,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:32:30,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:32:30,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:32:30,437 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 13:32:30,492 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:32:30,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:32:30,494 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:32:30,494 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:32:30,495 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:32:30,495 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:32:30,495 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:32:30,495 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:32:30,496 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:32:30,496 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:32:30,498 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:32:30,498 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:32:30,498 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:32:30,499 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:32:30,499 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:32:30,499 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:32:30,501 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:32:30,501 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:32:30,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:32:30,502 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:32:30,502 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:32:30,502 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:32:30,503 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:32:30,503 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:32:30,503 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:32:30,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:32:30,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:32:30,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:32:30,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:32:30,507 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:32:30,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:32:30,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:32:30,508 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:32:30,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:32:30,508 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:32:30,509 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:32:30,509 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:32:30,509 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_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b83c28af83745ba79af1b1ebec4b495db7aa2efb3702685bbdc4b86421ef4c0a [2021-11-19 13:32:30,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:32:30,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:32:30,964 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:32:30,966 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:32:30,969 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:32:30,970 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-19 13:32:31,067 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/data/3a34698e9/5868749d1bab41f6aec5c77c842fdbb9/FLAG69ba451ea [2021-11-19 13:32:32,224 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:32:32,224 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-19 13:32:32,290 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/data/3a34698e9/5868749d1bab41f6aec5c77c842fdbb9/FLAG69ba451ea [2021-11-19 13:32:32,600 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/data/3a34698e9/5868749d1bab41f6aec5c77c842fdbb9 [2021-11-19 13:32:32,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:32:32,604 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:32:32,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:32:32,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:32:32,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:32:32,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:32:32" (1/1) ... [2021-11-19 13:32:32,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1765ea2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:32, skipping insertion in model container [2021-11-19 13:32:32,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:32:32" (1/1) ... [2021-11-19 13:32:32,624 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:32:32,828 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:32:34,790 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i[216887,216900] [2021-11-19 13:32:34,826 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:32:34,867 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 13:32:34,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@bfc7c0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:34, skipping insertion in model container [2021-11-19 13:32:34,870 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:32:34,871 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:32:34,874 INFO L158 Benchmark]: Toolchain (without parser) took 2268.45ms. Allocated memory was 92.3MB in the beginning and 121.6MB in the end (delta: 29.4MB). Free memory was 47.5MB in the beginning and 71.2MB in the end (delta: -23.7MB). Peak memory consumption was 24.2MB. Max. memory is 16.1GB. [2021-11-19 13:32:34,875 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 92.3MB. Free memory was 65.0MB in the beginning and 65.0MB in the end (delta: 21.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:32:34,878 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2264.19ms. Allocated memory was 92.3MB in the beginning and 121.6MB in the end (delta: 29.4MB). Free memory was 47.2MB in the beginning and 71.2MB in the end (delta: -24.0MB). Peak memory consumption was 24.2MB. Max. memory is 16.1GB. [2021-11-19 13:32:34,881 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 92.3MB. Free memory was 65.0MB in the beginning and 65.0MB in the end (delta: 21.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2264.19ms. Allocated memory was 92.3MB in the beginning and 121.6MB in the end (delta: 29.4MB). Free memory was 47.2MB in the beginning and 71.2MB in the end (delta: -24.0MB). Peak memory consumption was 24.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5741]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs --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 64bit --witnessprinter.graph.data.programhash b83c28af83745ba79af1b1ebec4b495db7aa2efb3702685bbdc4b86421ef4c0a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:32:37,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:32:37,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:32:37,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:32:37,519 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:32:37,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:32:37,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:32:37,526 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:32:37,529 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:32:37,530 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:32:37,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:32:37,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:32:37,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:32:37,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:32:37,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:32:37,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:32:37,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:32:37,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:32:37,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:32:37,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:32:37,555 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:32:37,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:32:37,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:32:37,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:32:37,567 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:32:37,567 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:32:37,568 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:32:37,570 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:32:37,570 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:32:37,572 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:32:37,573 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:32:37,575 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:32:37,576 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:32:37,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:32:37,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:32:37,580 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:32:37,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:32:37,582 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:32:37,582 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:32:37,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:32:37,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:32:37,586 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 13:32:37,620 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:32:37,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:32:37,621 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:32:37,622 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:32:37,622 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:32:37,622 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:32:37,623 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:32:37,623 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:32:37,623 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:32:37,625 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:32:37,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:32:37,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:32:37,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:32:37,628 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:32:37,628 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:32:37,628 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:32:37,629 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:32:37,629 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:32:37,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:32:37,629 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:32:37,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:32:37,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:32:37,630 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:32:37,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:32:37,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:32:37,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:32:37,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:32:37,631 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:32:37,631 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:32:37,631 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:32:37,632 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:32:37,632 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:32:37,632 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:32:37,633 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_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b83c28af83745ba79af1b1ebec4b495db7aa2efb3702685bbdc4b86421ef4c0a [2021-11-19 13:32:38,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:32:38,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:32:38,067 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:32:38,069 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:32:38,072 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:32:38,074 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-19 13:32:38,167 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/data/c9c0a3c10/0a917d29055d44f3a7c6fd7639b37097/FLAGe861527d4 [2021-11-19 13:32:39,239 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:32:39,240 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-19 13:32:39,288 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/data/c9c0a3c10/0a917d29055d44f3a7c6fd7639b37097/FLAGe861527d4 [2021-11-19 13:32:39,590 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/data/c9c0a3c10/0a917d29055d44f3a7c6fd7639b37097 [2021-11-19 13:32:39,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:32:39,594 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:32:39,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:32:39,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:32:39,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:32:39,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:32:39" (1/1) ... [2021-11-19 13:32:39,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@426b48eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:39, skipping insertion in model container [2021-11-19 13:32:39,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:32:39" (1/1) ... [2021-11-19 13:32:39,611 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:32:39,761 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:32:41,753 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i[216887,216900] [2021-11-19 13:32:41,784 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:32:41,832 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:32:41,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:32:42,356 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i[216887,216900] [2021-11-19 13:32:42,371 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:32:42,385 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:32:42,754 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i[216887,216900] [2021-11-19 13:32:42,760 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:32:42,959 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:32:42,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:42 WrapperNode [2021-11-19 13:32:42,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:32:42,962 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:32:42,962 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:32:42,963 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:32:42,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:42" (1/1) ... [2021-11-19 13:32:43,080 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:42" (1/1) ... [2021-11-19 13:32:43,248 INFO L137 Inliner]: procedures = 200, calls = 873, calls flagged for inlining = 93, calls inlined = 91, statements flattened = 3097 [2021-11-19 13:32:43,248 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:32:43,250 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:32:43,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:32:43,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:32:43,303 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:42" (1/1) ... [2021-11-19 13:32:43,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:42" (1/1) ... [2021-11-19 13:32:43,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:42" (1/1) ... [2021-11-19 13:32:43,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:42" (1/1) ... [2021-11-19 13:32:43,480 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:42" (1/1) ... [2021-11-19 13:32:43,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:42" (1/1) ... [2021-11-19 13:32:43,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:42" (1/1) ... [2021-11-19 13:32:43,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:32:43,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:32:43,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:32:43,571 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:32:43,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:42" (1/1) ... [2021-11-19 13:32:43,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:32:43,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:32:43,622 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:32:43,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:32:43,692 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_nonpositive [2021-11-19 13:32:43,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_nonpositive [2021-11-19 13:32:43,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 13:32:43,693 INFO L130 BoogieDeclarations]: Found specification of procedure sl_tx_timeout [2021-11-19 13:32:43,693 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_tx_timeout [2021-11-19 13:32:43,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-19 13:32:43,693 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-19 13:32:43,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 13:32:43,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-19 13:32:43,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-19 13:32:43,694 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-19 13:32:43,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-19 13:32:43,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-19 13:32:43,695 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-19 13:32:43,695 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-19 13:32:43,695 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-19 13:32:43,695 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-19 13:32:43,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-19 13:32:43,696 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_unlock [2021-11-19 13:32:43,696 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_unlock [2021-11-19 13:32:43,696 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-19 13:32:43,696 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-19 13:32:43,697 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 13:32:43,697 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 13:32:43,697 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-19 13:32:43,697 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-19 13:32:43,697 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2021-11-19 13:32:43,698 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2021-11-19 13:32:43,698 INFO L130 BoogieDeclarations]: Found specification of procedure sl_bump [2021-11-19 13:32:43,698 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_bump [2021-11-19 13:32:43,698 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-19 13:32:43,698 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-19 13:32:43,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 13:32:43,699 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-19 13:32:43,699 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-19 13:32:43,700 INFO L130 BoogieDeclarations]: Found specification of procedure sl_get_stats64 [2021-11-19 13:32:43,700 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_get_stats64 [2021-11-19 13:32:43,700 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 13:32:43,701 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-11-19 13:32:43,701 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-11-19 13:32:43,701 INFO L130 BoogieDeclarations]: Found specification of procedure sl_ioctl [2021-11-19 13:32:43,701 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_ioctl [2021-11-19 13:32:43,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-19 13:32:43,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 13:32:43,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-19 13:32:43,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 13:32:43,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 13:32:43,702 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2021-11-19 13:32:43,703 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2021-11-19 13:32:43,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 13:32:43,703 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-19 13:32:43,705 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-19 13:32:43,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:32:43,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-19 13:32:43,707 INFO L130 BoogieDeclarations]: Found specification of procedure slip_hangup [2021-11-19 13:32:43,707 INFO L138 BoogieDeclarations]: Found implementation of procedure slip_hangup [2021-11-19 13:32:43,707 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-19 13:32:43,708 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-19 13:32:43,708 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-19 13:32:43,708 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-19 13:32:43,709 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-19 13:32:43,709 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-19 13:32:43,710 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-19 13:32:43,710 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-19 13:32:43,710 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2021-11-19 13:32:43,710 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2021-11-19 13:32:43,710 INFO L130 BoogieDeclarations]: Found specification of procedure sl_unlock [2021-11-19 13:32:43,711 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_unlock [2021-11-19 13:32:43,712 INFO L130 BoogieDeclarations]: Found specification of procedure activate_pending_timer_1 [2021-11-19 13:32:43,712 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_pending_timer_1 [2021-11-19 13:32:43,712 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-19 13:32:43,712 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-19 13:32:43,712 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2021-11-19 13:32:43,713 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2021-11-19 13:32:43,713 INFO L130 BoogieDeclarations]: Found specification of procedure slhc_free [2021-11-19 13:32:43,713 INFO L138 BoogieDeclarations]: Found implementation of procedure slhc_free [2021-11-19 13:32:43,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-19 13:32:43,713 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-19 13:32:43,714 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-19 13:32:43,714 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-19 13:32:43,714 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-19 13:32:43,715 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-19 13:32:43,715 INFO L130 BoogieDeclarations]: Found specification of procedure sl_free_bufs [2021-11-19 13:32:43,715 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_free_bufs [2021-11-19 13:32:43,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-19 13:32:43,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-19 13:32:43,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-19 13:32:43,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-19 13:32:43,717 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-19 13:32:43,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-19 13:32:43,718 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-19 13:32:43,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-19 13:32:43,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 13:32:43,720 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_1 [2021-11-19 13:32:43,720 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_1 [2021-11-19 13:32:43,721 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-19 13:32:43,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-19 13:32:43,721 INFO L130 BoogieDeclarations]: Found specification of procedure slip_ioctl [2021-11-19 13:32:43,721 INFO L138 BoogieDeclarations]: Found implementation of procedure slip_ioctl [2021-11-19 13:32:43,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:32:43,722 INFO L130 BoogieDeclarations]: Found specification of procedure slip_close [2021-11-19 13:32:43,722 INFO L138 BoogieDeclarations]: Found implementation of procedure slip_close [2021-11-19 13:32:43,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 13:32:43,722 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-19 13:32:43,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-19 13:32:43,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-19 13:32:43,723 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_1 [2021-11-19 13:32:43,723 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_1 [2021-11-19 13:32:43,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-19 13:32:43,724 INFO L130 BoogieDeclarations]: Found specification of procedure slip_compat_ioctl [2021-11-19 13:32:43,724 INFO L138 BoogieDeclarations]: Found implementation of procedure slip_compat_ioctl [2021-11-19 13:32:43,725 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-11-19 13:32:43,726 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-11-19 13:32:43,729 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~C_INT~TO~C_INT [2021-11-19 13:32:43,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~C_INT~TO~C_INT [2021-11-19 13:32:43,729 INFO L130 BoogieDeclarations]: Found specification of procedure tty_hangup [2021-11-19 13:32:43,730 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_hangup [2021-11-19 13:32:43,731 INFO L130 BoogieDeclarations]: Found specification of procedure tty_devnum [2021-11-19 13:32:43,732 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_devnum [2021-11-19 13:32:43,732 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-19 13:32:43,733 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-19 13:32:43,733 INFO L130 BoogieDeclarations]: Found specification of procedure sl_change_mtu [2021-11-19 13:32:43,740 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_change_mtu [2021-11-19 13:32:43,740 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~C_ULONG~TO~VOID [2021-11-19 13:32:43,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~C_ULONG~TO~VOID [2021-11-19 13:32:43,740 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-19 13:32:43,741 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-19 13:32:43,741 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-19 13:32:43,741 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2021-11-19 13:32:43,741 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2021-11-19 13:32:43,741 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2021-11-19 13:32:43,741 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2021-11-19 13:32:43,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:32:43,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:32:43,742 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2021-11-19 13:32:43,742 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2021-11-19 13:32:44,453 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:32:44,456 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:32:44,950 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-19 13:33:06,903 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:33:06,923 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:33:06,923 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 13:33:06,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:33:06 BoogieIcfgContainer [2021-11-19 13:33:06,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:33:06,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:33:06,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:33:06,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:33:06,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:32:39" (1/3) ... [2021-11-19 13:33:06,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@594f11ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:33:06, skipping insertion in model container [2021-11-19 13:33:06,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:42" (2/3) ... [2021-11-19 13:33:06,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@594f11ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:33:06, skipping insertion in model container [2021-11-19 13:33:06,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:33:06" (3/3) ... [2021-11-19 13:33:06,939 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-19 13:33:06,945 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:33:06,945 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:33:07,011 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:33:07,020 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 13:33:07,020 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:33:07,073 INFO L276 IsEmpty]: Start isEmpty. Operand has 1106 states, 816 states have (on average 1.4227941176470589) internal successors, (1161), 848 states have internal predecessors, (1161), 236 states have call successors, (236), 53 states have call predecessors, (236), 52 states have return successors, (231), 229 states have call predecessors, (231), 231 states have call successors, (231) [2021-11-19 13:33:07,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-19 13:33:07,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:07,101 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:07,102 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:07,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:07,108 INFO L85 PathProgramCache]: Analyzing trace with hash 50159505, now seen corresponding path program 1 times [2021-11-19 13:33:07,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:07,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1351293133] [2021-11-19 13:33:07,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:07,130 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:07,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:07,134 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:07,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:33:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:07,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 13:33:07,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-11-19 13:33:08,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-11-19 13:33:09,358 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:09,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1351293133] [2021-11-19 13:33:09,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1351293133] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:33:09,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:33:09,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-19 13:33:09,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618594616] [2021-11-19 13:33:09,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:09,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 13:33:09,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:09,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 13:33:09,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:33:09,425 INFO L87 Difference]: Start difference. First operand has 1106 states, 816 states have (on average 1.4227941176470589) internal successors, (1161), 848 states have internal predecessors, (1161), 236 states have call successors, (236), 53 states have call predecessors, (236), 52 states have return successors, (231), 229 states have call predecessors, (231), 231 states have call successors, (231) Second operand has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 13:33:09,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:09,594 INFO L93 Difference]: Finished difference Result 2208 states and 3277 transitions. [2021-11-19 13:33:09,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 13:33:09,596 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 161 [2021-11-19 13:33:09,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:09,631 INFO L225 Difference]: With dead ends: 2208 [2021-11-19 13:33:09,631 INFO L226 Difference]: Without dead ends: 1064 [2021-11-19 13:33:09,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:33:09,671 INFO L933 BasicCegarLoop]: 1625 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:09,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:33:09,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-11-19 13:33:09,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 1064. [2021-11-19 13:33:09,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 787 states have (on average 1.4142312579415501) internal successors, (1113), 811 states have internal predecessors, (1113), 224 states have call successors, (224), 52 states have call predecessors, (224), 52 states have return successors, (224), 222 states have call predecessors, (224), 224 states have call successors, (224) [2021-11-19 13:33:09,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1561 transitions. [2021-11-19 13:33:09,847 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1561 transitions. Word has length 161 [2021-11-19 13:33:09,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:09,847 INFO L470 AbstractCegarLoop]: Abstraction has 1064 states and 1561 transitions. [2021-11-19 13:33:09,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 13:33:09,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1561 transitions. [2021-11-19 13:33:09,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-19 13:33:09,867 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:09,868 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:09,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:10,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:10,093 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:10,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:10,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1568638009, now seen corresponding path program 1 times [2021-11-19 13:33:10,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:10,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1491181841] [2021-11-19 13:33:10,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:10,096 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:10,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:10,098 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:10,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:33:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:11,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 13:33:11,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2021-11-19 13:33:11,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:12,283 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-19 13:33:12,284 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:12,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1491181841] [2021-11-19 13:33:12,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1491181841] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:33:12,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:33:12,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:33:12,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218087248] [2021-11-19 13:33:12,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:12,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:33:12,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:12,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:33:12,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:33:12,300 INFO L87 Difference]: Start difference. First operand 1064 states and 1561 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 13:33:12,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:12,597 INFO L93 Difference]: Finished difference Result 2114 states and 3107 transitions. [2021-11-19 13:33:12,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:33:12,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 161 [2021-11-19 13:33:12,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:12,614 INFO L225 Difference]: With dead ends: 2114 [2021-11-19 13:33:12,615 INFO L226 Difference]: Without dead ends: 1065 [2021-11-19 13:33:12,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:33:12,631 INFO L933 BasicCegarLoop]: 1559 mSDtfsCounter, 3 mSDsluCounter, 3103 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 4662 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:12,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 4662 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:33:12,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2021-11-19 13:33:12,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1065. [2021-11-19 13:33:12,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 788 states have (on average 1.4137055837563453) internal successors, (1114), 812 states have internal predecessors, (1114), 224 states have call successors, (224), 52 states have call predecessors, (224), 52 states have return successors, (224), 222 states have call predecessors, (224), 224 states have call successors, (224) [2021-11-19 13:33:12,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1562 transitions. [2021-11-19 13:33:12,788 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1562 transitions. Word has length 161 [2021-11-19 13:33:12,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:12,790 INFO L470 AbstractCegarLoop]: Abstraction has 1065 states and 1562 transitions. [2021-11-19 13:33:12,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 13:33:12,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1562 transitions. [2021-11-19 13:33:12,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-19 13:33:12,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:12,798 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:12,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:13,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:13,004 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:13,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:13,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1190599185, now seen corresponding path program 1 times [2021-11-19 13:33:13,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:13,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [596737233] [2021-11-19 13:33:13,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:13,008 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:13,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:13,009 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:13,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:33:13,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:13,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:33:13,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:14,459 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2021-11-19 13:33:14,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-19 13:33:15,293 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:15,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [596737233] [2021-11-19 13:33:15,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [596737233] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:33:15,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1470352411] [2021-11-19 13:33:15,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:15,294 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:33:15,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:33:15,296 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:33:15,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-19 13:33:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:16,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:33:16,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:16,611 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2021-11-19 13:33:16,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:17,130 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2021-11-19 13:33:17,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1470352411] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:17,131 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:33:17,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-19 13:33:17,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307428766] [2021-11-19 13:33:17,132 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:17,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:33:17,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:17,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:33:17,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:33:17,134 INFO L87 Difference]: Start difference. First operand 1065 states and 1562 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-19 13:33:17,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:17,496 INFO L93 Difference]: Finished difference Result 2653 states and 3860 transitions. [2021-11-19 13:33:17,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:33:17,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 168 [2021-11-19 13:33:17,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:17,519 INFO L225 Difference]: With dead ends: 2653 [2021-11-19 13:33:17,519 INFO L226 Difference]: Without dead ends: 1625 [2021-11-19 13:33:17,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 661 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:33:17,534 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 828 mSDsluCounter, 1478 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 3172 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:17,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [828 Valid, 3172 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:33:17,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1625 states. [2021-11-19 13:33:17,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1625 to 1625. [2021-11-19 13:33:17,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1192 states have (on average 1.3976510067114094) internal successors, (1666), 1225 states have internal predecessors, (1666), 341 states have call successors, (341), 91 states have call predecessors, (341), 91 states have return successors, (341), 338 states have call predecessors, (341), 341 states have call successors, (341) [2021-11-19 13:33:17,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 2348 transitions. [2021-11-19 13:33:17,666 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 2348 transitions. Word has length 168 [2021-11-19 13:33:17,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:17,669 INFO L470 AbstractCegarLoop]: Abstraction has 1625 states and 2348 transitions. [2021-11-19 13:33:17,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-19 13:33:17,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 2348 transitions. [2021-11-19 13:33:17,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-19 13:33:17,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:17,682 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:17,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:17,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:18,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:18,090 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:18,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:18,091 INFO L85 PathProgramCache]: Analyzing trace with hash 655309847, now seen corresponding path program 1 times [2021-11-19 13:33:18,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:18,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575702017] [2021-11-19 13:33:18,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:18,094 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:18,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:18,099 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:18,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:33:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:18,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 951 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:33:18,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 196 proven. 1 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-11-19 13:33:19,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-19 13:33:20,774 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:20,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575702017] [2021-11-19 13:33:20,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575702017] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:33:20,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [435229137] [2021-11-19 13:33:20,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:20,776 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:33:20,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:33:20,792 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:33:20,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-19 13:33:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:21,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 951 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:33:21,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:22,246 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2021-11-19 13:33:22,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:22,919 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2021-11-19 13:33:22,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [435229137] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:22,920 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:33:22,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-19 13:33:22,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569511805] [2021-11-19 13:33:22,921 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:22,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:33:22,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:22,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:33:22,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:33:22,927 INFO L87 Difference]: Start difference. First operand 1625 states and 2348 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 13:33:25,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:25,857 INFO L93 Difference]: Finished difference Result 4767 states and 6904 transitions. [2021-11-19 13:33:25,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:33:25,858 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 229 [2021-11-19 13:33:25,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:25,891 INFO L225 Difference]: With dead ends: 4767 [2021-11-19 13:33:25,891 INFO L226 Difference]: Without dead ends: 3183 [2021-11-19 13:33:25,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 902 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:33:25,904 INFO L933 BasicCegarLoop]: 3049 mSDtfsCounter, 1491 mSDsluCounter, 5676 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1491 SdHoareTripleChecker+Valid, 8725 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:25,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1491 Valid, 8725 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-19 13:33:25,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3183 states. [2021-11-19 13:33:26,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3183 to 3177. [2021-11-19 13:33:26,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3177 states, 2337 states have (on average 1.4026529738981601) internal successors, (3278), 2403 states have internal predecessors, (3278), 662 states have call successors, (662), 177 states have call predecessors, (662), 177 states have return successors, (662), 654 states have call predecessors, (662), 662 states have call successors, (662) [2021-11-19 13:33:26,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 4602 transitions. [2021-11-19 13:33:26,146 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 4602 transitions. Word has length 229 [2021-11-19 13:33:26,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:26,148 INFO L470 AbstractCegarLoop]: Abstraction has 3177 states and 4602 transitions. [2021-11-19 13:33:26,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 13:33:26,148 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 4602 transitions. [2021-11-19 13:33:26,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-19 13:33:26,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:26,162 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:26,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:26,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:26,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:33:26,576 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:26,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:26,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1419853558, now seen corresponding path program 1 times [2021-11-19 13:33:26,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:26,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [672009776] [2021-11-19 13:33:26,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:26,579 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:26,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:26,582 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:26,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:33:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:27,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:33:27,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 196 proven. 1 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-11-19 13:33:28,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:29,081 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-19 13:33:29,082 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:29,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [672009776] [2021-11-19 13:33:29,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [672009776] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:33:29,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1254669507] [2021-11-19 13:33:29,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:29,083 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:33:29,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:33:29,084 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:33:29,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-19 13:33:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:29,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 13:33:29,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:30,803 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-11-19 13:33:30,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-11-19 13:33:32,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1254669507] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:32,455 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:33:32,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 22 [2021-11-19 13:33:32,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616227928] [2021-11-19 13:33:32,456 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:32,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 13:33:32,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:32,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 13:33:32,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-11-19 13:33:32,460 INFO L87 Difference]: Start difference. First operand 3177 states and 4602 transitions. Second operand has 16 states, 16 states have (on average 6.0625) internal successors, (97), 12 states have internal predecessors, (97), 2 states have call successors, (24), 2 states have call predecessors, (24), 6 states have return successors, (26), 6 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-19 13:33:38,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:38,404 INFO L93 Difference]: Finished difference Result 9965 states and 14447 transitions. [2021-11-19 13:33:38,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 13:33:38,406 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0625) internal successors, (97), 12 states have internal predecessors, (97), 2 states have call successors, (24), 2 states have call predecessors, (24), 6 states have return successors, (26), 6 states have call predecessors, (26), 2 states have call successors, (26) Word has length 232 [2021-11-19 13:33:38,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:38,477 INFO L225 Difference]: With dead ends: 9965 [2021-11-19 13:33:38,477 INFO L226 Difference]: Without dead ends: 6813 [2021-11-19 13:33:38,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 937 GetRequests, 904 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 13:33:38,497 INFO L933 BasicCegarLoop]: 2252 mSDtfsCounter, 2274 mSDsluCounter, 26298 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2286 SdHoareTripleChecker+Valid, 28550 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:38,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2286 Valid, 28550 Invalid, 511 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-19 13:33:38,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6813 states. [2021-11-19 13:33:38,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6813 to 5703. [2021-11-19 13:33:38,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5703 states, 4203 states have (on average 1.4075660242683796) internal successors, (5916), 4333 states have internal predecessors, (5916), 1173 states have call successors, (1173), 312 states have call predecessors, (1173), 326 states have return successors, (1225), 1164 states have call predecessors, (1225), 1173 states have call successors, (1225) [2021-11-19 13:33:38,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5703 states to 5703 states and 8314 transitions. [2021-11-19 13:33:38,979 INFO L78 Accepts]: Start accepts. Automaton has 5703 states and 8314 transitions. Word has length 232 [2021-11-19 13:33:38,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:38,980 INFO L470 AbstractCegarLoop]: Abstraction has 5703 states and 8314 transitions. [2021-11-19 13:33:38,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0625) internal successors, (97), 12 states have internal predecessors, (97), 2 states have call successors, (24), 2 states have call predecessors, (24), 6 states have return successors, (26), 6 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-19 13:33:38,981 INFO L276 IsEmpty]: Start isEmpty. Operand 5703 states and 8314 transitions. [2021-11-19 13:33:38,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-19 13:33:38,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:38,993 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:39,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:39,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:39,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:33:39,408 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:39,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:39,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1660023802, now seen corresponding path program 1 times [2021-11-19 13:33:39,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:39,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1000399473] [2021-11-19 13:33:39,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:39,411 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:39,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:39,412 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:39,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 13:33:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:40,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:33:40,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:40,780 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 216 proven. 1 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2021-11-19 13:33:40,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:41,626 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2021-11-19 13:33:41,627 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:41,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1000399473] [2021-11-19 13:33:41,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1000399473] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:33:41,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [310642214] [2021-11-19 13:33:41,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:41,627 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:33:41,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:33:41,630 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:33:41,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-19 13:33:43,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:43,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:33:43,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:43,645 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 216 proven. 1 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2021-11-19 13:33:43,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2021-11-19 13:33:44,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [310642214] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:33:44,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265131203] [2021-11-19 13:33:44,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:44,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:33:44,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:33:44,304 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:33:44,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 13:33:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:44,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:33:44,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2021-11-19 13:33:45,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2021-11-19 13:33:45,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265131203] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:45,798 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-19 13:33:45,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5, 5, 5] total 12 [2021-11-19 13:33:45,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743954024] [2021-11-19 13:33:45,800 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:45,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:33:45,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:45,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:33:45,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:33:45,804 INFO L87 Difference]: Start difference. First operand 5703 states and 8314 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2021-11-19 13:33:48,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:48,003 INFO L93 Difference]: Finished difference Result 10218 states and 15645 transitions. [2021-11-19 13:33:48,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 13:33:48,004 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) Word has length 238 [2021-11-19 13:33:48,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:48,109 INFO L225 Difference]: With dead ends: 10218 [2021-11-19 13:33:48,109 INFO L226 Difference]: Without dead ends: 10216 [2021-11-19 13:33:48,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1428 GetRequests, 1414 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:33:48,119 INFO L933 BasicCegarLoop]: 2734 mSDtfsCounter, 1769 mSDsluCounter, 8855 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1901 SdHoareTripleChecker+Valid, 11589 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:48,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1901 Valid, 11589 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 13:33:48,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10216 states. [2021-11-19 13:33:48,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10216 to 5711. [2021-11-19 13:33:48,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5711 states, 4211 states have (on average 1.406791735929708) internal successors, (5924), 4341 states have internal predecessors, (5924), 1173 states have call successors, (1173), 312 states have call predecessors, (1173), 326 states have return successors, (1225), 1164 states have call predecessors, (1225), 1173 states have call successors, (1225) [2021-11-19 13:33:48,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5711 states to 5711 states and 8322 transitions. [2021-11-19 13:33:48,724 INFO L78 Accepts]: Start accepts. Automaton has 5711 states and 8322 transitions. Word has length 238 [2021-11-19 13:33:48,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:48,725 INFO L470 AbstractCegarLoop]: Abstraction has 5711 states and 8322 transitions. [2021-11-19 13:33:48,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2021-11-19 13:33:48,726 INFO L276 IsEmpty]: Start isEmpty. Operand 5711 states and 8322 transitions. [2021-11-19 13:33:48,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-11-19 13:33:48,739 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:48,740 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:48,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:48,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:49,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:49,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:33:49,356 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:49,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:49,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1892362885, now seen corresponding path program 1 times [2021-11-19 13:33:49,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:49,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [894039681] [2021-11-19 13:33:49,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:49,358 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:49,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:49,360 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:49,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 13:33:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:50,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:33:50,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 216 proven. 1 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2021-11-19 13:33:50,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2021-11-19 13:33:51,860 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:51,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [894039681] [2021-11-19 13:33:51,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [894039681] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:33:51,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [172995375] [2021-11-19 13:33:51,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:51,861 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:33:51,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:33:51,862 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:33:51,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-19 13:33:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:53,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:33:53,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:53,938 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 216 proven. 1 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2021-11-19 13:33:53,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2021-11-19 13:33:54,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [172995375] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:33:54,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211713219] [2021-11-19 13:33:54,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:54,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:33:54,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:33:54,646 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:33:54,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-19 13:33:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:55,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:33:55,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:55,646 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2021-11-19 13:33:55,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:56,384 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2021-11-19 13:33:56,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211713219] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:56,384 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-19 13:33:56,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5, 5, 5] total 14 [2021-11-19 13:33:56,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114588538] [2021-11-19 13:33:56,386 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:56,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:33:56,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:56,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:33:56,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:33:56,391 INFO L87 Difference]: Start difference. First operand 5711 states and 8322 transitions. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 3 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 13:34:01,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:01,583 INFO L93 Difference]: Finished difference Result 13124 states and 20336 transitions. [2021-11-19 13:34:01,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 13:34:01,584 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 3 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 248 [2021-11-19 13:34:01,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:01,677 INFO L225 Difference]: With dead ends: 13124 [2021-11-19 13:34:01,677 INFO L226 Difference]: Without dead ends: 13122 [2021-11-19 13:34:01,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1498 GetRequests, 1474 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2021-11-19 13:34:01,687 INFO L933 BasicCegarLoop]: 3012 mSDtfsCounter, 3536 mSDsluCounter, 10083 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 992 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3641 SdHoareTripleChecker+Valid, 13095 SdHoareTripleChecker+Invalid, 1780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 992 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:01,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3641 Valid, 13095 Invalid, 1780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [992 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-19 13:34:01,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13122 states. [2021-11-19 13:34:02,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13122 to 5719. [2021-11-19 13:34:02,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5719 states, 4215 states have (on average 1.406405693950178) internal successors, (5928), 4341 states have internal predecessors, (5928), 1177 states have call successors, (1177), 312 states have call predecessors, (1177), 326 states have return successors, (1229), 1168 states have call predecessors, (1229), 1177 states have call successors, (1229) [2021-11-19 13:34:02,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5719 states to 5719 states and 8334 transitions. [2021-11-19 13:34:02,307 INFO L78 Accepts]: Start accepts. Automaton has 5719 states and 8334 transitions. Word has length 248 [2021-11-19 13:34:02,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:02,308 INFO L470 AbstractCegarLoop]: Abstraction has 5719 states and 8334 transitions. [2021-11-19 13:34:02,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 3 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 13:34:02,309 INFO L276 IsEmpty]: Start isEmpty. Operand 5719 states and 8334 transitions. [2021-11-19 13:34:02,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-11-19 13:34:02,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:02,333 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:02,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:02,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:02,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:02,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:34:02,948 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:02,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:02,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1240722864, now seen corresponding path program 1 times [2021-11-19 13:34:02,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:02,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2048185242] [2021-11-19 13:34:02,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:02,950 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:02,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:02,951 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:02,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 13:34:03,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:03,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 1077 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:34:03,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 216 proven. 1 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2021-11-19 13:34:04,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:05,584 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2021-11-19 13:34:05,585 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:05,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2048185242] [2021-11-19 13:34:05,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2048185242] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:34:05,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [23475121] [2021-11-19 13:34:05,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:05,586 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:34:05,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:34:05,587 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:34:05,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 13:34:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:06,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 1077 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:34:06,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:07,356 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-11-19 13:34:07,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2021-11-19 13:34:08,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [23475121] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:08,107 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:34:08,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-19 13:34:08,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432580982] [2021-11-19 13:34:08,107 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:08,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:34:08,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:08,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:34:08,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:34:08,109 INFO L87 Difference]: Start difference. First operand 5719 states and 8334 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-19 13:34:09,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:09,569 INFO L93 Difference]: Finished difference Result 8331 states and 12153 transitions. [2021-11-19 13:34:09,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:34:09,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) Word has length 278 [2021-11-19 13:34:09,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:09,607 INFO L225 Difference]: With dead ends: 8331 [2021-11-19 13:34:09,607 INFO L226 Difference]: Without dead ends: 3205 [2021-11-19 13:34:09,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1108 GetRequests, 1101 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:34:09,629 INFO L933 BasicCegarLoop]: 2311 mSDtfsCounter, 1455 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1455 SdHoareTripleChecker+Valid, 3133 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:09,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1455 Valid, 3133 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 13:34:09,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3205 states. [2021-11-19 13:34:09,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3205 to 3203. [2021-11-19 13:34:09,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 2354 states have (on average 1.3984706881903144) internal successors, (3292), 2422 states have internal predecessors, (3292), 663 states have call successors, (663), 177 states have call predecessors, (663), 185 states have return successors, (693), 659 states have call predecessors, (693), 663 states have call successors, (693) [2021-11-19 13:34:09,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 4648 transitions. [2021-11-19 13:34:09,860 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 4648 transitions. Word has length 278 [2021-11-19 13:34:09,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:09,861 INFO L470 AbstractCegarLoop]: Abstraction has 3203 states and 4648 transitions. [2021-11-19 13:34:09,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-19 13:34:09,862 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 4648 transitions. [2021-11-19 13:34:09,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-11-19 13:34:09,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:09,884 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:09,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:10,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:10,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:34:10,312 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:10,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:10,313 INFO L85 PathProgramCache]: Analyzing trace with hash -109080214, now seen corresponding path program 1 times [2021-11-19 13:34:10,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:10,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1595632348] [2021-11-19 13:34:10,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:10,314 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:10,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:10,315 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:10,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 13:34:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:11,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 1080 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:34:11,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:12,030 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 216 proven. 1 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2021-11-19 13:34:12,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:12,950 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2021-11-19 13:34:12,950 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:12,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1595632348] [2021-11-19 13:34:12,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1595632348] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:34:12,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [436249881] [2021-11-19 13:34:12,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:12,951 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:34:12,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:34:12,952 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:34:12,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-19 13:34:13,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:13,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 1080 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:34:13,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:14,165 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2021-11-19 13:34:14,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2021-11-19 13:34:14,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [436249881] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:14,690 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:34:14,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-19 13:34:14,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635515601] [2021-11-19 13:34:14,690 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:14,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:34:14,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:14,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:34:14,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:34:14,692 INFO L87 Difference]: Start difference. First operand 3203 states and 4648 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-19 13:34:14,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:14,819 INFO L93 Difference]: Finished difference Result 6363 states and 9281 transitions. [2021-11-19 13:34:14,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:34:14,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 280 [2021-11-19 13:34:14,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:14,839 INFO L225 Difference]: With dead ends: 6363 [2021-11-19 13:34:14,840 INFO L226 Difference]: Without dead ends: 3207 [2021-11-19 13:34:14,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1116 GetRequests, 1109 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:34:14,859 INFO L933 BasicCegarLoop]: 1554 mSDtfsCounter, 0 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3101 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:14,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 3101 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:34:14,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2021-11-19 13:34:15,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 3203. [2021-11-19 13:34:15,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 2354 states have (on average 1.393372982158029) internal successors, (3280), 2422 states have internal predecessors, (3280), 663 states have call successors, (663), 177 states have call predecessors, (663), 185 states have return successors, (693), 659 states have call predecessors, (693), 663 states have call successors, (693) [2021-11-19 13:34:15,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 4636 transitions. [2021-11-19 13:34:15,082 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 4636 transitions. Word has length 280 [2021-11-19 13:34:15,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:15,083 INFO L470 AbstractCegarLoop]: Abstraction has 3203 states and 4636 transitions. [2021-11-19 13:34:15,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-19 13:34:15,086 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 4636 transitions. [2021-11-19 13:34:15,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-11-19 13:34:15,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:15,139 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:15,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:15,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-19 13:34:15,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:15,547 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:15,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:15,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1145651103, now seen corresponding path program 1 times [2021-11-19 13:34:15,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:15,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1325423952] [2021-11-19 13:34:15,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:15,549 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:15,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:15,550 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:15,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 13:34:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:16,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:34:16,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:17,171 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 216 proven. 1 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2021-11-19 13:34:17,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:18,073 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2021-11-19 13:34:18,073 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:18,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1325423952] [2021-11-19 13:34:18,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1325423952] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:34:18,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1021156122] [2021-11-19 13:34:18,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:18,073 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:34:18,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:34:18,074 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:34:18,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 13:34:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:18,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 13:34:18,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2021-11-19 13:34:19,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2021-11-19 13:34:19,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1021156122] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:19,847 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:34:19,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-19 13:34:19,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490669271] [2021-11-19 13:34:19,848 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:19,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:34:19,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:19,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:34:19,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:34:19,849 INFO L87 Difference]: Start difference. First operand 3203 states and 4636 transitions. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-19 13:34:21,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:21,694 INFO L93 Difference]: Finished difference Result 8048 states and 12042 transitions. [2021-11-19 13:34:21,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:34:21,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 283 [2021-11-19 13:34:21,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:21,719 INFO L225 Difference]: With dead ends: 8048 [2021-11-19 13:34:21,720 INFO L226 Difference]: Without dead ends: 5438 [2021-11-19 13:34:21,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1130 GetRequests, 1119 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:34:21,734 INFO L933 BasicCegarLoop]: 2279 mSDtfsCounter, 1847 mSDsluCounter, 6460 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1991 SdHoareTripleChecker+Valid, 8739 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:21,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1991 Valid, 8739 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 13:34:21,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5438 states. [2021-11-19 13:34:21,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5438 to 3207. [2021-11-19 13:34:21,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3207 states, 2358 states have (on average 1.3927056827820186) internal successors, (3284), 2426 states have internal predecessors, (3284), 663 states have call successors, (663), 177 states have call predecessors, (663), 185 states have return successors, (693), 659 states have call predecessors, (693), 663 states have call successors, (693) [2021-11-19 13:34:21,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3207 states to 3207 states and 4640 transitions. [2021-11-19 13:34:21,982 INFO L78 Accepts]: Start accepts. Automaton has 3207 states and 4640 transitions. Word has length 283 [2021-11-19 13:34:21,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:21,983 INFO L470 AbstractCegarLoop]: Abstraction has 3207 states and 4640 transitions. [2021-11-19 13:34:21,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-19 13:34:21,984 INFO L276 IsEmpty]: Start isEmpty. Operand 3207 states and 4640 transitions. [2021-11-19 13:34:22,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-11-19 13:34:22,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:22,004 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:22,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-19 13:34:22,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-19 13:34:22,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:22,411 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:22,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:22,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1491453546, now seen corresponding path program 1 times [2021-11-19 13:34:22,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:22,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040109195] [2021-11-19 13:34:22,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:22,413 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:22,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:22,414 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:22,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 13:34:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:23,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 1172 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:34:23,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:24,106 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 216 proven. 1 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2021-11-19 13:34:24,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2021-11-19 13:34:24,997 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:24,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040109195] [2021-11-19 13:34:24,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040109195] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:34:24,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [979340329] [2021-11-19 13:34:24,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:24,997 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:34:24,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:34:25,006 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:34:25,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-19 13:34:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:25,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 1172 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:34:25,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2021-11-19 13:34:26,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2021-11-19 13:34:26,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [979340329] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:26,849 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:34:26,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-19 13:34:26,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526103757] [2021-11-19 13:34:26,849 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:26,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:34:26,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:26,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:34:26,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:34:26,851 INFO L87 Difference]: Start difference. First operand 3207 states and 4640 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-19 13:34:27,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:27,963 INFO L93 Difference]: Finished difference Result 6596 states and 9696 transitions. [2021-11-19 13:34:27,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:34:27,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 302 [2021-11-19 13:34:27,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:27,981 INFO L225 Difference]: With dead ends: 6596 [2021-11-19 13:34:27,982 INFO L226 Difference]: Without dead ends: 3982 [2021-11-19 13:34:27,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1204 GetRequests, 1196 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:34:27,994 INFO L933 BasicCegarLoop]: 2044 mSDtfsCounter, 349 mSDsluCounter, 1539 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 3583 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:27,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 3583 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 13:34:28,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3982 states. [2021-11-19 13:34:28,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3982 to 3209. [2021-11-19 13:34:28,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3209 states, 2360 states have (on average 1.3923728813559322) internal successors, (3286), 2428 states have internal predecessors, (3286), 663 states have call successors, (663), 177 states have call predecessors, (663), 185 states have return successors, (693), 659 states have call predecessors, (693), 663 states have call successors, (693) [2021-11-19 13:34:28,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 4642 transitions. [2021-11-19 13:34:28,234 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 4642 transitions. Word has length 302 [2021-11-19 13:34:28,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:28,235 INFO L470 AbstractCegarLoop]: Abstraction has 3209 states and 4642 transitions. [2021-11-19 13:34:28,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-19 13:34:28,235 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 4642 transitions. [2021-11-19 13:34:28,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-11-19 13:34:28,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:28,255 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:28,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:28,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:28,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:34:28,680 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:28,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:28,681 INFO L85 PathProgramCache]: Analyzing trace with hash 977423831, now seen corresponding path program 1 times [2021-11-19 13:34:28,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:28,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304458568] [2021-11-19 13:34:28,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:28,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:28,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:28,683 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:28,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 13:34:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:29,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 1175 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:34:29,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:30,404 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 216 proven. 1 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2021-11-19 13:34:30,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2021-11-19 13:34:31,348 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:31,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304458568] [2021-11-19 13:34:31,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [304458568] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:34:31,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [952757380] [2021-11-19 13:34:31,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:31,348 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:34:31,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:34:31,349 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:34:31,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-19 13:34:32,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:32,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 1175 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:34:32,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:32,595 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2021-11-19 13:34:32,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2021-11-19 13:34:33,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [952757380] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:33,113 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:34:33,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-19 13:34:33,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546696628] [2021-11-19 13:34:33,114 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:33,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:34:33,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:33,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:34:33,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:34:33,116 INFO L87 Difference]: Start difference. First operand 3209 states and 4642 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-19 13:34:33,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:33,749 INFO L93 Difference]: Finished difference Result 6590 states and 9684 transitions. [2021-11-19 13:34:33,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:34:33,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 304 [2021-11-19 13:34:33,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:33,785 INFO L225 Difference]: With dead ends: 6590 [2021-11-19 13:34:33,785 INFO L226 Difference]: Without dead ends: 3974 [2021-11-19 13:34:33,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1212 GetRequests, 1205 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:34:33,799 INFO L933 BasicCegarLoop]: 2036 mSDtfsCounter, 356 mSDsluCounter, 1602 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 3638 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:33,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 3638 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 13:34:33,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3974 states. [2021-11-19 13:34:34,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3974 to 3195. [2021-11-19 13:34:34,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3195 states, 2350 states have (on average 1.3914893617021276) internal successors, (3270), 2418 states have internal predecessors, (3270), 659 states have call successors, (659), 177 states have call predecessors, (659), 185 states have return successors, (689), 655 states have call predecessors, (689), 659 states have call successors, (689) [2021-11-19 13:34:34,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3195 states to 3195 states and 4618 transitions. [2021-11-19 13:34:34,117 INFO L78 Accepts]: Start accepts. Automaton has 3195 states and 4618 transitions. Word has length 304 [2021-11-19 13:34:34,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:34,118 INFO L470 AbstractCegarLoop]: Abstraction has 3195 states and 4618 transitions. [2021-11-19 13:34:34,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-19 13:34:34,119 INFO L276 IsEmpty]: Start isEmpty. Operand 3195 states and 4618 transitions. [2021-11-19 13:34:34,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-11-19 13:34:34,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:34,143 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:34,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:34,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-19 13:34:34,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:34,551 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:34,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:34,552 INFO L85 PathProgramCache]: Analyzing trace with hash -502299353, now seen corresponding path program 1 times [2021-11-19 13:34:34,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:34,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [878372678] [2021-11-19 13:34:34,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:34,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:34,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:34,554 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:34,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 13:34:35,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:35,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 1210 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:34:35,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:36,395 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 224 proven. 1 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-11-19 13:34:36,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:37,358 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2021-11-19 13:34:37,358 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:37,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [878372678] [2021-11-19 13:34:37,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [878372678] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:34:37,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1753277612] [2021-11-19 13:34:37,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:37,360 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:34:37,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:34:37,361 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:34:37,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-19 13:34:38,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:38,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 1210 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:34:38,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 522 trivial. 0 not checked. [2021-11-19 13:34:38,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:39,654 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2021-11-19 13:34:39,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1753277612] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:39,655 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:34:39,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-19 13:34:39,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273599123] [2021-11-19 13:34:39,655 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:39,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 13:34:39,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:39,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 13:34:39,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:34:39,657 INFO L87 Difference]: Start difference. First operand 3195 states and 4618 transitions. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 8 states have internal predecessors, (149), 2 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (38), 4 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-19 13:34:42,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:42,704 INFO L93 Difference]: Finished difference Result 9696 states and 14662 transitions. [2021-11-19 13:34:42,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:34:42,704 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 8 states have internal predecessors, (149), 2 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (38), 4 states have call predecessors, (38), 2 states have call successors, (38) Word has length 312 [2021-11-19 13:34:42,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:42,739 INFO L225 Difference]: With dead ends: 9696 [2021-11-19 13:34:42,740 INFO L226 Difference]: Without dead ends: 7094 [2021-11-19 13:34:42,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1249 GetRequests, 1232 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:34:42,755 INFO L933 BasicCegarLoop]: 3068 mSDtfsCounter, 2620 mSDsluCounter, 19517 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2840 SdHoareTripleChecker+Valid, 22585 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:42,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2840 Valid, 22585 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [516 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 13:34:42,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7094 states. [2021-11-19 13:34:43,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7094 to 3201. [2021-11-19 13:34:43,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 2356 states have (on average 1.3904923599320882) internal successors, (3276), 2422 states have internal predecessors, (3276), 659 states have call successors, (659), 177 states have call predecessors, (659), 185 states have return successors, (689), 657 states have call predecessors, (689), 659 states have call successors, (689) [2021-11-19 13:34:43,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 4624 transitions. [2021-11-19 13:34:43,120 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 4624 transitions. Word has length 312 [2021-11-19 13:34:43,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:43,121 INFO L470 AbstractCegarLoop]: Abstraction has 3201 states and 4624 transitions. [2021-11-19 13:34:43,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 8 states have internal predecessors, (149), 2 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (38), 4 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-19 13:34:43,122 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 4624 transitions. [2021-11-19 13:34:43,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2021-11-19 13:34:43,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:43,140 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:43,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:43,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:43,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:43,548 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:43,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:43,548 INFO L85 PathProgramCache]: Analyzing trace with hash -295260041, now seen corresponding path program 2 times [2021-11-19 13:34:43,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:43,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419271751] [2021-11-19 13:34:43,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 13:34:43,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:43,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:43,551 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:43,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 13:34:54,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 13:34:54,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:34:54,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 1225 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:34:54,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:55,256 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 244 proven. 1 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-11-19 13:34:55,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 522 trivial. 0 not checked. [2021-11-19 13:34:56,271 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:56,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419271751] [2021-11-19 13:34:56,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419271751] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:34:56,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2127360839] [2021-11-19 13:34:56,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 13:34:56,272 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:34:56,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:34:56,274 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:34:56,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dde36860-fc5f-44a7-b061-e37533617e81/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process