./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.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_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/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_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/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_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/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 5bb1e95e9d6379d31cbb3e207d6fe85ddf495edebf9b764e927537f63dbf829e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:23:17,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:23:17,034 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:23:17,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:23:17,120 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:23:17,125 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:23:17,129 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:23:17,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:23:17,140 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:23:17,147 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:23:17,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:23:17,151 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:23:17,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:23:17,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:23:17,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:23:17,164 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:23:17,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:23:17,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:23:17,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:23:17,175 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:23:17,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:23:17,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:23:17,181 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:23:17,183 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:23:17,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:23:17,188 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:23:17,188 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:23:17,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:23:17,191 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:23:17,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:23:17,193 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:23:17,194 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:23:17,195 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:23:17,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:23:17,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:23:17,199 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:23:17,201 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:23:17,203 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:23:17,203 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:23:17,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:23:17,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:23:17,207 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 13:23:17,261 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:23:17,262 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:23:17,264 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:23:17,264 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:23:17,265 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:23:17,265 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:23:17,265 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:23:17,266 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:23:17,274 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:23:17,274 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:23:17,276 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:23:17,276 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:23:17,276 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:23:17,277 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:23:17,277 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:23:17,277 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:23:17,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:23:17,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:23:17,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:23:17,279 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:23:17,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:23:17,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:23:17,280 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:23:17,281 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:23:17,281 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:23:17,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:23:17,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:23:17,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:23:17,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:23:17,284 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:23:17,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:23:17,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:23:17,286 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:23:17,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:23:17,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:23:17,287 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:23:17,287 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:23:17,287 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_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bb1e95e9d6379d31cbb3e207d6fe85ddf495edebf9b764e927537f63dbf829e [2021-11-19 13:23:17,678 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:23:17,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:23:17,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:23:17,717 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:23:17,718 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:23:17,719 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i [2021-11-19 13:23:17,841 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/data/714095010/fbe226cdd83e41e3927e7c7801eb4713/FLAGdee109b13 [2021-11-19 13:23:18,803 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:23:18,803 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i [2021-11-19 13:23:18,870 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/data/714095010/fbe226cdd83e41e3927e7c7801eb4713/FLAGdee109b13 [2021-11-19 13:23:19,264 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/data/714095010/fbe226cdd83e41e3927e7c7801eb4713 [2021-11-19 13:23:19,268 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:23:19,271 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:23:19,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:23:19,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:23:19,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:23:19,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:23:19" (1/1) ... [2021-11-19 13:23:19,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33d0ac6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:19, skipping insertion in model container [2021-11-19 13:23:19,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:23:19" (1/1) ... [2021-11-19 13:23:19,294 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:23:19,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:23:19,759 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_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4494,4507] [2021-11-19 13:23:19,767 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_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4554,4567] [2021-11-19 13:23:19,796 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 13:23:19,803 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 13:23:20,961 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:20,962 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:20,963 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:20,965 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:20,967 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:20,987 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:20,988 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:20,991 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:20,992 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:20,996 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:20,998 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:20,999 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:21,000 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:21,545 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 13:23:21,554 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 13:23:21,556 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 13:23:21,557 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 13:23:21,559 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 13:23:21,560 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 13:23:21,561 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 13:23:21,562 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 13:23:21,562 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 13:23:21,563 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 13:23:21,751 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 13:23:21,785 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:23:21,809 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 13:23:21,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3bd43747 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:21, skipping insertion in model container [2021-11-19 13:23:21,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:23:21,811 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:23:21,813 INFO L158 Benchmark]: Toolchain (without parser) took 2541.07ms. Allocated memory was 98.6MB in the beginning and 123.7MB in the end (delta: 25.2MB). Free memory was 59.3MB in the beginning and 66.8MB in the end (delta: -7.5MB). Peak memory consumption was 18.7MB. Max. memory is 16.1GB. [2021-11-19 13:23:21,815 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 98.6MB. Free memory was 53.0MB in the beginning and 52.9MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:23:21,816 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2534.99ms. Allocated memory was 98.6MB in the beginning and 123.7MB in the end (delta: 25.2MB). Free memory was 59.1MB in the beginning and 66.8MB in the end (delta: -7.7MB). Peak memory consumption was 18.7MB. Max. memory is 16.1GB. [2021-11-19 13:23:21,819 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 98.6MB. Free memory was 53.0MB in the beginning and 52.9MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2534.99ms. Allocated memory was 98.6MB in the beginning and 123.7MB in the end (delta: 25.2MB). Free memory was 59.1MB in the beginning and 66.8MB in the end (delta: -7.7MB). Peak memory consumption was 18.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7039]: 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_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/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_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/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_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/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 5bb1e95e9d6379d31cbb3e207d6fe85ddf495edebf9b764e927537f63dbf829e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:23:24,872 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:23:24,877 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:23:24,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:23:24,949 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:23:24,955 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:23:24,958 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:23:24,964 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:23:24,968 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:23:24,978 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:23:24,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:23:24,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:23:24,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:23:24,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:23:24,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:23:24,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:23:24,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:23:25,000 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:23:25,003 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:23:25,013 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:23:25,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:23:25,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:23:25,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:23:25,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:23:25,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:23:25,037 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:23:25,038 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:23:25,040 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:23:25,041 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:23:25,043 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:23:25,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:23:25,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:23:25,047 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:23:25,048 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:23:25,050 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:23:25,073 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:23:25,074 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:23:25,074 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:23:25,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:23:25,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:23:25,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:23:25,085 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 13:23:25,137 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:23:25,138 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:23:25,140 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:23:25,140 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:23:25,140 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:23:25,141 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:23:25,141 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:23:25,141 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:23:25,143 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:23:25,143 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:23:25,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:23:25,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:23:25,147 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:23:25,147 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:23:25,148 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:23:25,148 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:23:25,148 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:23:25,149 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:23:25,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:23:25,149 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:23:25,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:23:25,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:23:25,150 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:23:25,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:23:25,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:23:25,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:23:25,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:23:25,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:23:25,152 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:23:25,153 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:23:25,153 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:23:25,153 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:23:25,154 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:23:25,154 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_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bb1e95e9d6379d31cbb3e207d6fe85ddf495edebf9b764e927537f63dbf829e [2021-11-19 13:23:25,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:23:25,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:23:25,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:23:25,708 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:23:25,709 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:23:25,711 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i [2021-11-19 13:23:25,797 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/data/bb6dea871/3a8720e3f0214ee197dda61d01a64d88/FLAG882ef57a5 [2021-11-19 13:23:26,979 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:23:26,981 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i [2021-11-19 13:23:27,041 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/data/bb6dea871/3a8720e3f0214ee197dda61d01a64d88/FLAG882ef57a5 [2021-11-19 13:23:27,365 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/data/bb6dea871/3a8720e3f0214ee197dda61d01a64d88 [2021-11-19 13:23:27,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:23:27,371 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:23:27,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:23:27,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:23:27,380 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:23:27,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:23:27" (1/1) ... [2021-11-19 13:23:27,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d9d8b86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:27, skipping insertion in model container [2021-11-19 13:23:27,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:23:27" (1/1) ... [2021-11-19 13:23:27,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:23:27,556 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:23:28,007 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_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4494,4507] [2021-11-19 13:23:28,020 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_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4554,4567] [2021-11-19 13:23:28,054 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 13:23:28,063 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 13:23:29,104 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:29,108 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:29,109 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:29,111 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:29,112 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:29,145 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:29,146 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:29,149 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:29,150 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:29,153 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:29,155 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:29,156 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:29,157 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:29,699 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 13:23:29,705 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 13:23:29,707 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 13:23:29,709 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 13:23:29,716 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 13:23:29,717 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 13:23:29,718 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 13:23:29,719 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 13:23:29,720 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 13:23:29,721 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 13:23:29,948 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 13:23:29,986 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:23:30,015 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:23:30,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:23:30,065 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_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4494,4507] [2021-11-19 13:23:30,067 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_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4554,4567] [2021-11-19 13:23:30,070 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 13:23:30,070 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 13:23:30,210 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:30,211 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:30,212 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:30,214 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:30,224 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:30,241 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:30,243 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:30,246 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:30,248 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:30,254 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:30,255 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:30,257 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:30,264 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:30,366 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 13:23:30,367 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 13:23:30,368 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 13:23:30,370 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 13:23:30,378 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 13:23:30,379 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 13:23:30,380 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 13:23:30,381 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 13:23:30,382 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 13:23:30,383 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 13:23:30,440 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 13:23:30,475 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:23:30,495 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:23:30,523 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_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4494,4507] [2021-11-19 13:23:30,537 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_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4554,4567] [2021-11-19 13:23:30,540 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 13:23:30,541 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 13:23:30,621 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:30,623 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:30,623 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:30,624 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:30,625 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:30,640 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:30,641 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:30,643 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:30,644 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:30,645 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:30,647 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:30,648 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:30,649 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:23:30,733 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 13:23:30,735 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 13:23:30,736 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 13:23:30,737 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 13:23:30,738 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 13:23:30,739 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 13:23:30,740 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 13:23:30,741 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 13:23:30,741 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 13:23:30,742 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 13:23:30,783 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 13:23:30,807 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:23:31,144 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:23:31,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:31 WrapperNode [2021-11-19 13:23:31,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:23:31,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:23:31,147 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:23:31,147 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:23:31,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:31" (1/1) ... [2021-11-19 13:23:31,281 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:31" (1/1) ... [2021-11-19 13:23:31,417 INFO L137 Inliner]: procedures = 700, calls = 1041, calls flagged for inlining = 50, calls inlined = 4, statements flattened = 58 [2021-11-19 13:23:31,418 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:23:31,418 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:23:31,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:23:31,419 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:23:31,441 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:31" (1/1) ... [2021-11-19 13:23:31,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:31" (1/1) ... [2021-11-19 13:23:31,447 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:31" (1/1) ... [2021-11-19 13:23:31,448 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:31" (1/1) ... [2021-11-19 13:23:31,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:31" (1/1) ... [2021-11-19 13:23:31,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:31" (1/1) ... [2021-11-19 13:23:31,501 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:31" (1/1) ... [2021-11-19 13:23:31,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:23:31,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:23:31,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:23:31,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:23:31,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:31" (1/1) ... [2021-11-19 13:23:31,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:23:31,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:23:31,577 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:23:31,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:23:31,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 13:23:31,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:23:31,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 13:23:31,643 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 13:23:31,643 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-19 13:23:31,644 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-19 13:23:31,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:23:31,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 13:23:31,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:23:31,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:23:31,645 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 13:23:31,645 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 13:23:31,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 13:23:31,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 13:23:31,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 13:23:31,646 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-11-19 13:23:31,646 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-11-19 13:23:32,008 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:23:32,011 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:23:32,242 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:23:32,250 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:23:32,251 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 13:23:32,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:23:32 BoogieIcfgContainer [2021-11-19 13:23:32,253 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:23:32,256 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:23:32,256 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:23:32,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:23:32,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:23:27" (1/3) ... [2021-11-19 13:23:32,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33636304 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:23:32, skipping insertion in model container [2021-11-19 13:23:32,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:31" (2/3) ... [2021-11-19 13:23:32,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33636304 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:23:32, skipping insertion in model container [2021-11-19 13:23:32,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:23:32" (3/3) ... [2021-11-19 13:23:32,264 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_next_harness.i [2021-11-19 13:23:32,271 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:23:32,271 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:23:32,334 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:23:32,341 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 13:23:32,341 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:23:32,363 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-19 13:23:32,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-19 13:23:32,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:32,370 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:32,371 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:32,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:32,378 INFO L85 PathProgramCache]: Analyzing trace with hash 829036907, now seen corresponding path program 1 times [2021-11-19 13:23:32,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:32,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1504602266] [2021-11-19 13:23:32,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:32,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:32,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:32,401 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:32,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:23:32,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:32,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 13:23:32,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:23:32,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:32,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 13:23:32,972 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:32,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1504602266] [2021-11-19 13:23:32,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1504602266] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:32,974 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:32,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 13:23:32,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319367797] [2021-11-19 13:23:32,976 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:32,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 13:23:32,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:33,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 13:23:33,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:23:33,022 INFO L87 Difference]: Start difference. First operand has 50 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 13:23:33,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:33,075 INFO L93 Difference]: Finished difference Result 94 states and 124 transitions. [2021-11-19 13:23:33,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 13:23:33,080 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-11-19 13:23:33,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:33,093 INFO L225 Difference]: With dead ends: 94 [2021-11-19 13:23:33,093 INFO L226 Difference]: Without dead ends: 45 [2021-11-19 13:23:33,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 54 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 13:23:33,105 INFO L933 BasicCegarLoop]: 61 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, 61 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 13:23:33,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:23:33,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-19 13:23:33,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-19 13:23:33,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-19 13:23:33,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2021-11-19 13:23:33,168 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 28 [2021-11-19 13:23:33,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:33,170 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2021-11-19 13:23:33,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 13:23:33,171 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2021-11-19 13:23:33,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-19 13:23:33,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:33,176 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:33,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:33,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:33,391 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:33,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:33,392 INFO L85 PathProgramCache]: Analyzing trace with hash -192031447, now seen corresponding path program 1 times [2021-11-19 13:23:33,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:33,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [259327255] [2021-11-19 13:23:33,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:33,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:33,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:33,401 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:33,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:23:33,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:33,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-19 13:23:33,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:36,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:23:36,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:52,903 WARN L227 SmtUtils]: Spent 11.63s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 13:24:04,454 WARN L227 SmtUtils]: Spent 10.97s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 13:24:12,366 INFO L354 Elim1Store]: treesize reduction 21, result has 79.6 percent of original size [2021-11-19 13:24:12,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 125 [2021-11-19 13:24:13,813 INFO L354 Elim1Store]: treesize reduction 8, result has 88.1 percent of original size [2021-11-19 13:24:13,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 113 treesize of output 143 [2021-11-19 13:24:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:24:20,060 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:24:20,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [259327255] [2021-11-19 13:24:20,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [259327255] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:24:20,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:24:20,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [15] total 29 [2021-11-19 13:24:20,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16886466] [2021-11-19 13:24:20,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:24:20,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 13:24:20,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:24:20,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 13:24:20,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=726, Unknown=1, NotChecked=0, Total=812 [2021-11-19 13:24:20,065 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 17 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 13:24:23,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:24:23,249 INFO L93 Difference]: Finished difference Result 84 states and 109 transitions. [2021-11-19 13:24:23,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 13:24:23,250 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-11-19 13:24:23,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:24:23,254 INFO L225 Difference]: With dead ends: 84 [2021-11-19 13:24:23,255 INFO L226 Difference]: Without dead ends: 82 [2021-11-19 13:24:23,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=105, Invalid=886, Unknown=1, NotChecked=0, Total=992 [2021-11-19 13:24:23,258 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 29 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:24:23,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 856 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 213 Invalid, 0 Unknown, 92 Unchecked, 2.2s Time] [2021-11-19 13:24:23,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-19 13:24:23,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 66. [2021-11-19 13:24:23,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 45 states have internal predecessors, (49), 15 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (18), 14 states have call predecessors, (18), 14 states have call successors, (18) [2021-11-19 13:24:23,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2021-11-19 13:24:23,280 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 28 [2021-11-19 13:24:23,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:24:23,281 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2021-11-19 13:24:23,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 13:24:23,282 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2021-11-19 13:24:23,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-19 13:24:23,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:24:23,284 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:24:23,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:24:23,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:24:23,500 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:24:23,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:24:23,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1001378073, now seen corresponding path program 1 times [2021-11-19 13:24:23,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:24:23,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [783101963] [2021-11-19 13:24:23,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:23,502 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:24:23,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:24:23,504 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:24:23,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:24:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:23,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 13:24:23,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:24:29,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:24:29,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:24:34,456 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-19 13:24:34,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-19 13:24:34,504 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-19 13:24:34,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-11-19 13:24:34,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:24:34,556 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:24:34,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [783101963] [2021-11-19 13:24:34,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [783101963] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:24:34,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1913071595] [2021-11-19 13:24:34,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:34,558 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:24:34,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:24:34,562 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:24:34,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-19 13:24:34,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:34,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 13:24:34,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:24:42,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:24:42,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:24:45,877 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-19 13:24:45,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-19 13:24:45,918 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-19 13:24:45,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-11-19 13:24:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:24:45,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1913071595] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:24:45,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904185025] [2021-11-19 13:24:45,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:45,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:24:45,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:24:45,992 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:24:46,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 13:24:46,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:46,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 13:24:46,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:24:48,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:24:48,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:24:51,399 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-19 13:24:51,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-19 13:24:51,442 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-19 13:24:51,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-11-19 13:24:51,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:24:51,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904185025] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:24:51,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:24:51,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 13, 11, 12, 11] total 27 [2021-11-19 13:24:51,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151681125] [2021-11-19 13:24:51,498 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:24:51,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-19 13:24:51,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:24:51,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-19 13:24:51,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-11-19 13:24:51,502 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 27 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 27 states have internal predecessors, (47), 5 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 13:25:02,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:25:02,797 INFO L93 Difference]: Finished difference Result 162 states and 216 transitions. [2021-11-19 13:25:02,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 13:25:02,799 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 27 states have internal predecessors, (47), 5 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 28 [2021-11-19 13:25:02,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:25:02,803 INFO L225 Difference]: With dead ends: 162 [2021-11-19 13:25:02,804 INFO L226 Difference]: Without dead ends: 114 [2021-11-19 13:25:02,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 134 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2021-11-19 13:25:02,809 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 62 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:25:02,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 505 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 299 Invalid, 0 Unknown, 171 Unchecked, 3.2s Time] [2021-11-19 13:25:02,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-19 13:25:02,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 77. [2021-11-19 13:25:02,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 55 states have internal predecessors, (59), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2021-11-19 13:25:02,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2021-11-19 13:25:02,848 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 28 [2021-11-19 13:25:02,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:25:02,848 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2021-11-19 13:25:02,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 27 states have internal predecessors, (47), 5 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 13:25:02,849 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2021-11-19 13:25:02,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-19 13:25:02,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:25:02,851 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:25:02,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:25:03,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-19 13:25:03,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:25:03,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:25:03,460 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:25:03,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:25:03,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1394405083, now seen corresponding path program 1 times [2021-11-19 13:25:03,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:25:03,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195023209] [2021-11-19 13:25:03,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:03,461 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:25:03,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:25:03,462 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:25:03,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 13:25:03,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:03,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:25:03,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:04,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:25:04,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:25:04,955 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:25:04,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195023209] [2021-11-19 13:25:04,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1195023209] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:25:04,956 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:25:04,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-19 13:25:04,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593623124] [2021-11-19 13:25:04,956 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:25:04,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:25:04,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:25:04,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:25:04,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:25:04,959 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 13:25:05,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:25:05,211 INFO L93 Difference]: Finished difference Result 149 states and 178 transitions. [2021-11-19 13:25:05,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:25:05,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-11-19 13:25:05,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:25:05,215 INFO L225 Difference]: With dead ends: 149 [2021-11-19 13:25:05,215 INFO L226 Difference]: Without dead ends: 67 [2021-11-19 13:25:05,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:25:05,219 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 12 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:25:05,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 191 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:25:05,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-19 13:25:05,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-11-19 13:25:05,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 41 states have (on average 1.146341463414634) internal successors, (47), 43 states have internal predecessors, (47), 12 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-19 13:25:05,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-11-19 13:25:05,235 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 28 [2021-11-19 13:25:05,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:25:05,236 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-11-19 13:25:05,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 13:25:05,237 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-11-19 13:25:05,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 13:25:05,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:25:05,239 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 13:25:05,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:25:05,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:25:05,455 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:25:05,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:25:05,456 INFO L85 PathProgramCache]: Analyzing trace with hash 854159971, now seen corresponding path program 1 times [2021-11-19 13:25:05,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:25:05,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [192310902] [2021-11-19 13:25:05,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:05,458 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:25:05,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:25:05,460 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:25:05,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:25:05,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:05,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-19 13:25:05,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:14,683 INFO L354 Elim1Store]: treesize reduction 192, result has 28.1 percent of original size [2021-11-19 13:25:14,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 237 treesize of output 189 [2021-11-19 13:25:16,195 INFO L354 Elim1Store]: treesize reduction 47, result has 59.8 percent of original size [2021-11-19 13:25:16,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 147 treesize of output 157 [2021-11-19 13:25:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:25:17,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:26:22,510 WARN L227 SmtUtils]: Spent 11.89s on a formula simplification. DAG size of input: 72 DAG size of output: 65 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 13:26:22,511 INFO L354 Elim1Store]: treesize reduction 25, result has 84.3 percent of original size [2021-11-19 13:26:22,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 116 treesize of output 203 [2021-11-19 13:26:27,277 INFO L354 Elim1Store]: treesize reduction 23, result has 79.3 percent of original size [2021-11-19 13:26:27,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 213 treesize of output 220 [2021-11-19 13:27:21,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:27:21,978 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:27:21,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [192310902] [2021-11-19 13:27:21,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [192310902] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:27:21,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1056184516] [2021-11-19 13:27:21,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:27:21,980 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:27:21,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:27:21,985 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:27:21,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-19 13:27:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:27:22,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-19 13:27:22,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:28:05,314 INFO L354 Elim1Store]: treesize reduction 97, result has 41.2 percent of original size [2021-11-19 13:28:05,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 237 treesize of output 182 [2021-11-19 13:28:07,114 INFO L354 Elim1Store]: treesize reduction 59, result has 47.8 percent of original size [2021-11-19 13:28:07,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 143 treesize of output 137 [2021-11-19 13:28:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:28:07,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:28:18,894 INFO L354 Elim1Store]: treesize reduction 45, result has 2.2 percent of original size [2021-11-19 13:28:18,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 1 [2021-11-19 13:28:31,538 WARN L227 SmtUtils]: Spent 12.10s on a formula simplification. DAG size of input: 72 DAG size of output: 65 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 13:28:31,539 INFO L354 Elim1Store]: treesize reduction 25, result has 84.3 percent of original size [2021-11-19 13:28:31,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 116 treesize of output 203 [2021-11-19 13:28:36,914 WARN L227 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 66 DAG size of output: 55 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 13:28:36,915 INFO L354 Elim1Store]: treesize reduction 23, result has 79.3 percent of original size [2021-11-19 13:28:36,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 213 treesize of output 220 [2021-11-19 13:28:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:28:55,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1056184516] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:28:55,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561979102] [2021-11-19 13:28:55,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:28:55,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:28:55,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:28:55,342 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:28:55,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 13:28:55,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:28:55,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-19 13:28:55,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:28:55,895 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-19 13:28:55,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 51 [2021-11-19 13:28:56,243 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-19 13:28:56,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 38 [2021-11-19 13:28:56,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 42 [2021-11-19 13:29:44,362 INFO L354 Elim1Store]: treesize reduction 152, result has 25.1 percent of original size [2021-11-19 13:29:44,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 243 treesize of output 175 [2021-11-19 13:29:46,146 INFO L354 Elim1Store]: treesize reduction 130, result has 23.1 percent of original size [2021-11-19 13:29:46,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 159 treesize of output 127 [2021-11-19 13:29:46,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:29:46,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 13:29:54,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561979102] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:29:54,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-19 13:29:54,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [17, 16, 21, 16, 15] total 51 [2021-11-19 13:29:54,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359892599] [2021-11-19 13:29:54,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:54,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:29:54,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:54,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:29:54,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2331, Unknown=17, NotChecked=0, Total=2550 [2021-11-19 13:29:54,324 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-19 13:30:15,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:15,124 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2021-11-19 13:30:15,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 13:30:15,127 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2021-11-19 13:30:15,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:15,132 INFO L225 Difference]: With dead ends: 72 [2021-11-19 13:30:15,132 INFO L226 Difference]: Without dead ends: 70 [2021-11-19 13:30:15,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 183 SyntacticMatches, 14 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 142.8s TimeCoverageRelationStatistics Valid=226, Invalid=2832, Unknown=22, NotChecked=0, Total=3080 [2021-11-19 13:30:15,135 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 30 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:15,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 294 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 196 Invalid, 0 Unknown, 40 Unchecked, 4.6s Time] [2021-11-19 13:30:15,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-19 13:30:15,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-11-19 13:30:15,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 49 states have internal predecessors, (52), 13 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2021-11-19 13:30:15,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2021-11-19 13:30:15,151 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 42 [2021-11-19 13:30:15,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:15,152 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2021-11-19 13:30:15,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-19 13:30:15,153 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2021-11-19 13:30:15,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 13:30:15,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:15,155 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 13:30:15,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:15,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:15,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:15,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:15,762 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:15,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:15,762 INFO L85 PathProgramCache]: Analyzing trace with hash 44813345, now seen corresponding path program 1 times [2021-11-19 13:30:15,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:15,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [323588515] [2021-11-19 13:30:15,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:15,764 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:15,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:15,765 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:15,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 13:30:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:15,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-19 13:30:15,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:19,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-11-19 13:30:29,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:29,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:41,524 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-19 13:30:41,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 13 [2021-11-19 13:30:45,239 INFO L354 Elim1Store]: treesize reduction 29, result has 71.8 percent of original size [2021-11-19 13:30:45,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 90 [2021-11-19 13:30:45,317 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-19 13:30:45,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 54 [2021-11-19 13:30:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:30:46,642 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:46,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [323588515] [2021-11-19 13:30:46,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [323588515] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:30:46,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1864281396] [2021-11-19 13:30:46,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:46,643 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:30:46,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:30:46,644 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:30:46,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-19 13:30:46,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:46,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-19 13:30:46,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:50,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-11-19 13:31:08,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:31:08,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:15,785 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-19 13:31:15,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 13 [2021-11-19 13:31:17,873 INFO L354 Elim1Store]: treesize reduction 29, result has 71.8 percent of original size [2021-11-19 13:31:17,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 90 [2021-11-19 13:31:17,951 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-19 13:31:17,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 54 [2021-11-19 13:31:18,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:31:18,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1864281396] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:31:18,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538212791] [2021-11-19 13:31:18,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:18,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:31:18,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:31:18,680 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:31:18,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-19 13:31:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:18,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 13:31:18,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:19,116 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-19 13:31:19,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 51 [2021-11-19 13:31:19,379 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-19 13:31:19,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 38 [2021-11-19 13:31:19,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 42 [2021-11-19 13:31:36,667 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-19 13:31:36,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 40 [2021-11-19 13:31:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:31:56,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 13:31:59,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538212791] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:31:59,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-19 13:31:59,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [16, 15, 18, 15, 10] total 47 [2021-11-19 13:31:59,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484333345] [2021-11-19 13:31:59,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:59,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:31:59,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:59,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:31:59,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1951, Unknown=0, NotChecked=0, Total=2162 [2021-11-19 13:31:59,140 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 13:32:05,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:05,097 INFO L93 Difference]: Finished difference Result 115 states and 136 transitions. [2021-11-19 13:32:05,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:32:05,100 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2021-11-19 13:32:05,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:05,101 INFO L225 Difference]: With dead ends: 115 [2021-11-19 13:32:05,102 INFO L226 Difference]: Without dead ends: 75 [2021-11-19 13:32:05,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 188 SyntacticMatches, 13 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 62.3s TimeCoverageRelationStatistics Valid=234, Invalid=2216, Unknown=0, NotChecked=0, Total=2450 [2021-11-19 13:32:05,105 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 29 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:05,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 147 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-19 13:32:05,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-19 13:32:05,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2021-11-19 13:32:05,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.14) internal successors, (57), 54 states have internal predecessors, (57), 13 states have call successors, (13), 7 states have call predecessors, (13), 10 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2021-11-19 13:32:05,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2021-11-19 13:32:05,119 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 42 [2021-11-19 13:32:05,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:05,120 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2021-11-19 13:32:05,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 13:32:05,120 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2021-11-19 13:32:05,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 13:32:05,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:05,122 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 13:32:05,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:32:05,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-19 13:32:05,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-19 13:32:05,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:32:05,727 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:05,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:05,728 INFO L85 PathProgramCache]: Analyzing trace with hash -348213665, now seen corresponding path program 1 times [2021-11-19 13:32:05,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:32:05,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [882260500] [2021-11-19 13:32:05,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:05,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:32:05,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:32:05,729 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:32:05,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 13:32:05,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:05,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 13:32:05,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:32:10,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-11-19 13:32:10,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-19 13:32:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:32:12,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:32:19,781 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-19 13:32:19,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-19 13:32:19,854 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-19 13:32:19,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-11-19 13:32:19,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:32:19,949 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:32:19,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [882260500] [2021-11-19 13:32:19,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [882260500] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:32:19,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1330500252] [2021-11-19 13:32:19,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:19,949 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:32:19,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:32:19,952 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:32:19,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-19 13:32:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:20,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 13:32:20,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:32:26,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-11-19 13:32:27,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-19 13:32:27,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:32:27,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:32:33,348 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-19 13:32:33,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-19 13:32:33,417 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-19 13:32:33,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-11-19 13:32:33,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:32:33,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1330500252] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:32:33,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935202294] [2021-11-19 13:32:33,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:33,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:32:33,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:32:33,518 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:32:33,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-19 13:32:33,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:33,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 13:32:33,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:32:35,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-11-19 13:32:35,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-19 13:32:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:32:36,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:32:41,822 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-19 13:32:41,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-19 13:32:41,922 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-19 13:32:41,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-11-19 13:32:42,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:32:42,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935202294] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:32:42,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:32:42,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 12, 10, 11, 10] total 19 [2021-11-19 13:32:42,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85508408] [2021-11-19 13:32:42,036 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:32:42,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 13:32:42,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:32:42,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 13:32:42,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:32:42,037 INFO L87 Difference]: Start difference. First operand 74 states and 86 transitions. Second operand has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-19 13:32:53,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:53,889 INFO L93 Difference]: Finished difference Result 136 states and 160 transitions. [2021-11-19 13:32:53,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 13:32:53,890 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 42 [2021-11-19 13:32:53,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:53,892 INFO L225 Difference]: With dead ends: 136 [2021-11-19 13:32:53,892 INFO L226 Difference]: Without dead ends: 84 [2021-11-19 13:32:53,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 232 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-11-19 13:32:53,899 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 80 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:53,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 361 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 290 Invalid, 0 Unknown, 63 Unchecked, 5.7s Time] [2021-11-19 13:32:53,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-19 13:32:53,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2021-11-19 13:32:53,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 54 states have internal predecessors, (59), 12 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-19 13:32:53,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2021-11-19 13:32:53,914 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 42 [2021-11-19 13:32:53,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:53,915 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2021-11-19 13:32:53,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-19 13:32:53,915 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2021-11-19 13:32:53,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-19 13:32:53,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:53,917 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 13:32:53,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 13:32:54,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-19 13:32:54,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-11-19 13:32:54,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:32:54,531 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:54,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:54,532 INFO L85 PathProgramCache]: Analyzing trace with hash -541770688, now seen corresponding path program 1 times [2021-11-19 13:32:54,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:32:54,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1044775307] [2021-11-19 13:32:54,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:54,533 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:32:54,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:32:54,535 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:32:54,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 13:32:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:54,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:32:54,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:32:55,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-19 13:32:55,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-19 13:32:56,213 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:32:56,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:32:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:32:57,350 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:32:57,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1044775307] [2021-11-19 13:32:57,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1044775307] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:57,350 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:57,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-19 13:32:57,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812750925] [2021-11-19 13:32:57,350 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:57,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:32:57,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:32:57,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:32:57,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:32:57,352 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 13:32:59,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:59,120 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2021-11-19 13:32:59,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:32:59,121 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2021-11-19 13:32:59,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:59,123 INFO L225 Difference]: With dead ends: 80 [2021-11-19 13:32:59,123 INFO L226 Difference]: Without dead ends: 78 [2021-11-19 13:32:59,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:32:59,124 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 10 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:59,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 314 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 13:32:59,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-19 13:32:59,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-19 13:32:59,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 57 states have internal predecessors, (62), 12 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-19 13:32:59,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2021-11-19 13:32:59,137 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 48 [2021-11-19 13:32:59,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:59,137 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2021-11-19 13:32:59,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 13:32:59,138 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2021-11-19 13:32:59,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 13:32:59,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:59,140 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:32:59,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 13:32:59,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:32:59,355 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:59,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:59,355 INFO L85 PathProgramCache]: Analyzing trace with hash -266250434, now seen corresponding path program 1 times [2021-11-19 13:32:59,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:32:59,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [444108016] [2021-11-19 13:32:59,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:59,356 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:32:59,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:32:59,357 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:32:59,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff7d1cd5-5cf6-4890-96eb-92b6633a9aa8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 13:32:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:59,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-19 13:32:59,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:50,874 WARN L227 SmtUtils]: Spent 6.13s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 13:34:05,612 WARN L227 SmtUtils]: Spent 6.35s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 13:34:28,906 WARN L227 SmtUtils]: Spent 8.16s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 13:34:47,417 WARN L227 SmtUtils]: Spent 8.38s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 13:35:17,417 WARN L227 SmtUtils]: Spent 10.29s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 13:35:40,401 WARN L227 SmtUtils]: Spent 10.41s on a formula simplification that was a NOOP. DAG size: 89 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 13:36:17,112 WARN L227 SmtUtils]: Spent 12.26s on a formula simplification that was a NOOP. DAG size: 89 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 13:36:30,931 WARN L227 SmtUtils]: Spent 12.39s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 13:36:46,966 WARN L227 SmtUtils]: Spent 12.92s on a formula simplification that was a NOOP. DAG size: 110 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 13:37:02,071 WARN L227 SmtUtils]: Spent 12.92s on a formula simplification that was a NOOP. DAG size: 113 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 13:37:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 27 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:05,514 INFO L328 TraceCheckSpWp]: Computing backward predicates...