./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_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_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/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_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/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_52f95fd9-e2c1-456d-9518-3b9c56c368af/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 588c504bc2fd23c9ce280a0a1b43a680048f163183a3674ad6d00cde5eb05799 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:17:35,702 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:17:35,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:17:35,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:17:35,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:17:35,759 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:17:35,763 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:17:35,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:17:35,771 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:17:35,778 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:17:35,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:17:35,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:17:35,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:17:35,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:17:35,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:17:35,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:17:35,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:17:35,795 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:17:35,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:17:35,801 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:17:35,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:17:35,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:17:35,810 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:17:35,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:17:35,818 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:17:35,818 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:17:35,819 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:17:35,820 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:17:35,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:17:35,823 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:17:35,824 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:17:35,825 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:17:35,827 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:17:35,828 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:17:35,829 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:17:35,829 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:17:35,830 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:17:35,830 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:17:35,831 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:17:35,832 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:17:35,832 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:17:35,834 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 14:17:35,881 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:17:35,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:17:35,886 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:17:35,886 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:17:35,886 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:17:35,887 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:17:35,887 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:17:35,887 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:17:35,893 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:17:35,894 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:17:35,895 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:17:35,895 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:17:35,895 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:17:35,895 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:17:35,896 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:17:35,896 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:17:35,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:17:35,897 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:17:35,897 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:17:35,897 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:17:35,897 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:17:35,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:17:35,898 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:17:35,898 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:17:35,898 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:17:35,898 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:17:35,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:17:35,899 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:17:35,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:17:35,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:17:35,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:17:35,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:17:35,902 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:17:35,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:17:35,902 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:17:35,902 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:17:35,902 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:17:35,903 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_52f95fd9-e2c1-456d-9518-3b9c56c368af/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 588c504bc2fd23c9ce280a0a1b43a680048f163183a3674ad6d00cde5eb05799 [2021-11-19 14:17:36,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:17:36,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:17:36,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:17:36,185 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:17:36,185 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:17:36,187 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2021-11-19 14:17:36,258 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/data/5dac4bbb1/217f4e5f46634a5d8c2a9bea7aafb436/FLAG7401d955f [2021-11-19 14:17:37,057 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:17:37,058 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2021-11-19 14:17:37,097 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/data/5dac4bbb1/217f4e5f46634a5d8c2a9bea7aafb436/FLAG7401d955f [2021-11-19 14:17:37,241 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/data/5dac4bbb1/217f4e5f46634a5d8c2a9bea7aafb436 [2021-11-19 14:17:37,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:17:37,247 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:17:37,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:17:37,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:17:37,255 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:17:37,256 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:17:37" (1/1) ... [2021-11-19 14:17:37,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47426af4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:37, skipping insertion in model container [2021-11-19 14:17:37,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:17:37" (1/1) ... [2021-11-19 14:17:37,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:17:37,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:17:37,638 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_52f95fd9-e2c1-456d-9518-3b9c56c368af/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4496,4509] [2021-11-19 14:17:37,647 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_52f95fd9-e2c1-456d-9518-3b9c56c368af/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4556,4569] [2021-11-19 14:17:37,668 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 14:17:37,675 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 14:17:38,336 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:38,340 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:38,341 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:38,342 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:38,345 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:38,363 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:38,364 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:38,366 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:38,366 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:38,368 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:38,369 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:38,370 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:38,370 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:38,763 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 14:17:38,765 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 14:17:38,766 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 14:17:38,767 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 14:17:38,769 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 14:17:38,770 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 14:17:38,770 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 14:17:38,772 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 14:17:38,772 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 14:17:38,777 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 14:17:38,911 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 14:17:38,933 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:17:38,949 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 14:17:38,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6388996e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:38, skipping insertion in model container [2021-11-19 14:17:38,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:17:38,950 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:17:38,952 INFO L158 Benchmark]: Toolchain (without parser) took 1703.50ms. Allocated memory is still 98.6MB. Free memory was 74.2MB in the beginning and 41.2MB in the end (delta: 32.9MB). Peak memory consumption was 31.9MB. Max. memory is 16.1GB. [2021-11-19 14:17:38,952 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 98.6MB. Free memory was 77.1MB in the beginning and 77.1MB in the end (delta: 46.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:17:38,953 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1700.50ms. Allocated memory is still 98.6MB. Free memory was 74.2MB in the beginning and 41.6MB in the end (delta: 32.5MB). Peak memory consumption was 31.9MB. Max. memory is 16.1GB. [2021-11-19 14:17:38,955 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 98.6MB. Free memory was 77.1MB in the beginning and 77.1MB in the end (delta: 46.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1700.50ms. Allocated memory is still 98.6MB. Free memory was 74.2MB in the beginning and 41.6MB in the end (delta: 32.5MB). Peak memory consumption was 31.9MB. 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_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/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_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/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_52f95fd9-e2c1-456d-9518-3b9c56c368af/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 588c504bc2fd23c9ce280a0a1b43a680048f163183a3674ad6d00cde5eb05799 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:17:41,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:17:41,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:17:41,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:17:41,186 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:17:41,190 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:17:41,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:17:41,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:17:41,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:17:41,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:17:41,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:17:41,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:17:41,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:17:41,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:17:41,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:17:41,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:17:41,221 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:17:41,222 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:17:41,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:17:41,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:17:41,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:17:41,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:17:41,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:17:41,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:17:41,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:17:41,248 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:17:41,248 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:17:41,250 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:17:41,251 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:17:41,252 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:17:41,252 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:17:41,272 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:17:41,273 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:17:41,274 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:17:41,276 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:17:41,276 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:17:41,277 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:17:41,277 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:17:41,277 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:17:41,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:17:41,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:17:41,285 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 14:17:41,329 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:17:41,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:17:41,330 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:17:41,331 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:17:41,331 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:17:41,331 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:17:41,331 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:17:41,331 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:17:41,332 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:17:41,332 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:17:41,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:17:41,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:17:41,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:17:41,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:17:41,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:17:41,335 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:17:41,335 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:17:41,335 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:17:41,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:17:41,336 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:17:41,336 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:17:41,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:17:41,336 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:17:41,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:17:41,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:17:41,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:17:41,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:17:41,337 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:17:41,337 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:17:41,337 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:17:41,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:17:41,338 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:17:41,338 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:17:41,338 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_52f95fd9-e2c1-456d-9518-3b9c56c368af/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 588c504bc2fd23c9ce280a0a1b43a680048f163183a3674ad6d00cde5eb05799 [2021-11-19 14:17:41,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:17:41,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:17:41,740 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:17:41,742 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:17:41,743 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:17:41,745 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2021-11-19 14:17:41,827 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/data/b98fa8546/38ef3695b87f41c79455b7e856609823/FLAG8f9b30821 [2021-11-19 14:17:42,736 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:17:42,737 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2021-11-19 14:17:42,773 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/data/b98fa8546/38ef3695b87f41c79455b7e856609823/FLAG8f9b30821 [2021-11-19 14:17:43,226 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/data/b98fa8546/38ef3695b87f41c79455b7e856609823 [2021-11-19 14:17:43,228 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:17:43,230 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:17:43,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:17:43,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:17:43,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:17:43,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:17:43" (1/1) ... [2021-11-19 14:17:43,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@101ac2f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:43, skipping insertion in model container [2021-11-19 14:17:43,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:17:43" (1/1) ... [2021-11-19 14:17:43,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:17:43,362 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:17:43,673 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_52f95fd9-e2c1-456d-9518-3b9c56c368af/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4496,4509] [2021-11-19 14:17:43,679 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_52f95fd9-e2c1-456d-9518-3b9c56c368af/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4556,4569] [2021-11-19 14:17:43,704 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 14:17:43,710 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 14:17:44,556 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:44,557 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:44,557 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:44,558 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:44,559 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:44,572 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:44,573 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:44,575 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:44,576 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:44,577 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:44,579 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:44,579 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:44,580 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:44,959 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 14:17:44,960 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 14:17:44,961 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 14:17:44,962 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 14:17:44,964 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 14:17:44,964 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 14:17:44,965 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 14:17:44,966 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 14:17:44,966 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 14:17:44,967 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 14:17:45,117 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 14:17:45,147 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:17:45,172 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:17:45,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:17:45,250 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_52f95fd9-e2c1-456d-9518-3b9c56c368af/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4496,4509] [2021-11-19 14:17:45,275 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_52f95fd9-e2c1-456d-9518-3b9c56c368af/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4556,4569] [2021-11-19 14:17:45,276 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 14:17:45,277 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 14:17:45,347 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:45,347 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:45,350 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:45,350 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:45,351 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:45,364 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:45,364 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:45,366 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:45,366 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:45,367 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:45,368 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:45,369 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:45,372 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:45,438 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 14:17:45,439 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 14:17:45,440 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 14:17:45,441 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 14:17:45,447 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 14:17:45,448 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 14:17:45,448 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 14:17:45,449 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 14:17:45,449 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 14:17:45,450 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 14:17:45,475 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 14:17:45,504 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:17:45,516 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:17:45,539 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_52f95fd9-e2c1-456d-9518-3b9c56c368af/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4496,4509] [2021-11-19 14:17:45,545 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_52f95fd9-e2c1-456d-9518-3b9c56c368af/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4556,4569] [2021-11-19 14:17:45,546 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 14:17:45,554 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 14:17:45,627 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:45,628 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:45,628 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:45,631 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:45,632 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:45,640 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:45,640 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:45,641 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:45,646 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:45,647 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:45,648 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:45,649 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:45,649 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:17:45,686 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 14:17:45,686 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 14:17:45,687 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 14:17:45,687 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 14:17:45,688 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 14:17:45,688 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 14:17:45,689 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 14:17:45,690 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 14:17:45,690 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 14:17:45,690 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 14:17:45,715 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 14:17:45,729 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:17:45,967 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:17:45,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:45 WrapperNode [2021-11-19 14:17:45,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:17:45,969 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:17:45,969 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:17:45,969 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:17:45,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:45" (1/1) ... [2021-11-19 14:17:46,082 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:45" (1/1) ... [2021-11-19 14:17:46,141 INFO L137 Inliner]: procedures = 700, calls = 1050, calls flagged for inlining = 49, calls inlined = 4, statements flattened = 89 [2021-11-19 14:17:46,141 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:17:46,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:17:46,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:17:46,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:17:46,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:45" (1/1) ... [2021-11-19 14:17:46,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:45" (1/1) ... [2021-11-19 14:17:46,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:45" (1/1) ... [2021-11-19 14:17:46,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:45" (1/1) ... [2021-11-19 14:17:46,200 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:45" (1/1) ... [2021-11-19 14:17:46,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:45" (1/1) ... [2021-11-19 14:17:46,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:45" (1/1) ... [2021-11-19 14:17:46,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:17:46,253 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:17:46,253 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:17:46,253 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:17:46,254 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:45" (1/1) ... [2021-11-19 14:17:46,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:17:46,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:17:46,286 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:17:46,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:17:46,334 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-11-19 14:17:46,334 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-11-19 14:17:46,334 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2021-11-19 14:17:46,335 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2021-11-19 14:17:46,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:17:46,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:17:46,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 14:17:46,336 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 14:17:46,336 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-19 14:17:46,336 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-19 14:17:46,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:17:46,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:17:46,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:17:46,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:17:46,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 14:17:46,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 14:17:46,338 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 14:17:46,338 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 14:17:46,338 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 14:17:46,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:17:46,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:17:46,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 14:17:46,339 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-11-19 14:17:46,339 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-11-19 14:17:46,604 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:17:46,606 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:17:46,965 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:17:46,973 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:17:46,973 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-19 14:17:46,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:17:46 BoogieIcfgContainer [2021-11-19 14:17:46,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:17:46,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:17:46,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:17:46,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:17:46,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:17:43" (1/3) ... [2021-11-19 14:17:46,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6d4b03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:17:46, skipping insertion in model container [2021-11-19 14:17:46,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:45" (2/3) ... [2021-11-19 14:17:46,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6d4b03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:17:46, skipping insertion in model container [2021-11-19 14:17:46,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:17:46" (3/3) ... [2021-11-19 14:17:46,981 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_remove_harness.i [2021-11-19 14:17:46,986 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:17:46,986 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:17:47,034 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:17:47,040 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 14:17:47,040 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:17:47,060 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 50 states have internal predecessors, (62), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-19 14:17:47,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-19 14:17:47,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:47,096 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-11-19 14:17:47,097 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:47,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:47,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1155526354, now seen corresponding path program 1 times [2021-11-19 14:17:47,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:47,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [755840803] [2021-11-19 14:17:47,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:47,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:47,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:47,136 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:47,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:17:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:47,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:17:47,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:47,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:17:47,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:17:47,774 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:47,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [755840803] [2021-11-19 14:17:47,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [755840803] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:47,775 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:47,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:17:47,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128845834] [2021-11-19 14:17:47,777 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:47,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:17:47,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:47,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:17:47,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:17:47,813 INFO L87 Difference]: Start difference. First operand has 74 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 50 states have internal predecessors, (62), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-19 14:17:47,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:47,843 INFO L93 Difference]: Finished difference Result 142 states and 195 transitions. [2021-11-19 14:17:47,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:17:47,845 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 48 [2021-11-19 14:17:47,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:47,855 INFO L225 Difference]: With dead ends: 142 [2021-11-19 14:17:47,855 INFO L226 Difference]: Without dead ends: 69 [2021-11-19 14:17:47,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 94 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 14:17:47,862 INFO L933 BasicCegarLoop]: 91 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, 91 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 14:17:47,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:17:47,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-19 14:17:47,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-19 14:17:47,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 45 states have internal predecessors, (53), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-19 14:17:47,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2021-11-19 14:17:47,907 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 48 [2021-11-19 14:17:47,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:47,909 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2021-11-19 14:17:47,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-19 14:17:47,910 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2021-11-19 14:17:47,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-19 14:17:47,912 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:47,913 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:47,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:48,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:48,129 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:48,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:48,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1718448822, now seen corresponding path program 1 times [2021-11-19 14:17:48,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:48,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [734990723] [2021-11-19 14:17:48,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:48,132 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:48,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:48,134 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:48,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:17:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:48,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:17:48,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:48,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:17:48,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:48,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:17:48,994 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:48,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [734990723] [2021-11-19 14:17:48,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [734990723] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:48,995 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:48,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-19 14:17:48,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791527936] [2021-11-19 14:17:48,996 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:48,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:17:48,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:48,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:17:48,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:17:49,000 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand has 7 states, 5 states have (on average 9.6) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:17:49,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:49,324 INFO L93 Difference]: Finished difference Result 138 states and 173 transitions. [2021-11-19 14:17:49,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:17:49,325 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 9.6) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 54 [2021-11-19 14:17:49,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:49,329 INFO L225 Difference]: With dead ends: 138 [2021-11-19 14:17:49,330 INFO L226 Difference]: Without dead ends: 74 [2021-11-19 14:17:49,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:17:49,333 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 32 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:49,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 334 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:17:49,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-19 14:17:49,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-19 14:17:49,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 50 states have internal predecessors, (58), 17 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2021-11-19 14:17:49,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2021-11-19 14:17:49,355 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 54 [2021-11-19 14:17:49,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:49,356 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2021-11-19 14:17:49,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 9.6) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:17:49,356 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2021-11-19 14:17:49,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-19 14:17:49,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:49,359 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:49,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:49,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:49,579 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:49,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:49,579 INFO L85 PathProgramCache]: Analyzing trace with hash 637356428, now seen corresponding path program 1 times [2021-11-19 14:17:49,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:49,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [607420286] [2021-11-19 14:17:49,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:49,581 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:49,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:49,587 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:49,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:17:49,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:49,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:17:49,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:49,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:17:49,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:17:50,221 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:50,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [607420286] [2021-11-19 14:17:50,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [607420286] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:50,222 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:50,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:17:50,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472771239] [2021-11-19 14:17:50,223 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:50,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:17:50,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:50,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:17:50,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:17:50,229 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:17:50,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:50,320 INFO L93 Difference]: Finished difference Result 134 states and 167 transitions. [2021-11-19 14:17:50,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:17:50,321 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 54 [2021-11-19 14:17:50,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:50,329 INFO L225 Difference]: With dead ends: 134 [2021-11-19 14:17:50,329 INFO L226 Difference]: Without dead ends: 76 [2021-11-19 14:17:50,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:17:50,337 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 4 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:50,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 333 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:17:50,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-19 14:17:50,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-19 14:17:50,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 50 states have (on average 1.2) internal successors, (60), 52 states have internal predecessors, (60), 17 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2021-11-19 14:17:50,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 94 transitions. [2021-11-19 14:17:50,370 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 94 transitions. Word has length 54 [2021-11-19 14:17:50,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:50,371 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 94 transitions. [2021-11-19 14:17:50,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:17:50,371 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 94 transitions. [2021-11-19 14:17:50,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-19 14:17:50,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:50,378 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:50,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:50,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:50,594 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:50,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:50,595 INFO L85 PathProgramCache]: Analyzing trace with hash -548924052, now seen corresponding path program 1 times [2021-11-19 14:17:50,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:50,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733443890] [2021-11-19 14:17:50,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:50,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:50,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:50,598 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:50,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:17:50,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:50,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:17:50,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:17:51,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:51,411 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:17:51,411 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:51,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733443890] [2021-11-19 14:17:51,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733443890] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:17:51,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [135214541] [2021-11-19 14:17:51,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:51,412 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:17:51,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:17:51,414 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:17:51,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-19 14:17:51,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:51,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:17:51,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:17:51,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:52,002 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:17:52,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [135214541] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:52,002 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:17:52,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6, 6] total 18 [2021-11-19 14:17:52,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606527622] [2021-11-19 14:17:52,003 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:52,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:17:52,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:52,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:17:52,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:17:52,005 INFO L87 Difference]: Start difference. First operand 76 states and 94 transitions. Second operand has 10 states, 8 states have (on average 4.625) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-19 14:17:52,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:52,145 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2021-11-19 14:17:52,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:17:52,145 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.625) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) Word has length 56 [2021-11-19 14:17:52,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:52,147 INFO L225 Difference]: With dead ends: 86 [2021-11-19 14:17:52,147 INFO L226 Difference]: Without dead ends: 84 [2021-11-19 14:17:52,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:17:52,149 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 9 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:52,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 573 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:17:52,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-19 14:17:52,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-11-19 14:17:52,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 57 states have internal predecessors, (64), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-11-19 14:17:52,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2021-11-19 14:17:52,161 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 56 [2021-11-19 14:17:52,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:52,162 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2021-11-19 14:17:52,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.625) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-19 14:17:52,162 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2021-11-19 14:17:52,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-19 14:17:52,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:52,164 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:52,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:52,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-19 14:17:52,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:52,566 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:52,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:52,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1019138147, now seen corresponding path program 1 times [2021-11-19 14:17:52,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:52,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2036938959] [2021-11-19 14:17:52,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:52,568 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:52,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:52,568 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:52,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:17:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:52,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:17:52,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:52,913 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:17:52,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:17:53,206 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:53,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2036938959] [2021-11-19 14:17:53,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2036938959] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:17:53,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1537923431] [2021-11-19 14:17:53,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:53,207 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:17:53,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:17:53,208 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:17:53,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-19 14:17:53,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:53,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:17:53,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:53,643 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:17:53,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:17:53,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1537923431] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:17:53,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428114816] [2021-11-19 14:17:53,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:53,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:17:53,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:17:53,839 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:17:53,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 14:17:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:53,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:17:53,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:54,140 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:17:54,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:54,512 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:17:54,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428114816] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:17:54,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:17:54,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 14 [2021-11-19 14:17:54,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45166243] [2021-11-19 14:17:54,513 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:17:54,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:17:54,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:54,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:17:54,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:17:54,516 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:17:55,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:55,039 INFO L93 Difference]: Finished difference Result 152 states and 187 transitions. [2021-11-19 14:17:55,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 14:17:55,046 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 56 [2021-11-19 14:17:55,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:55,047 INFO L225 Difference]: With dead ends: 152 [2021-11-19 14:17:55,048 INFO L226 Difference]: Without dead ends: 87 [2021-11-19 14:17:55,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:17:55,050 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 13 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:55,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 493 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:17:55,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-19 14:17:55,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-19 14:17:55,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 61 states have internal predecessors, (68), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-11-19 14:17:55,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 105 transitions. [2021-11-19 14:17:55,065 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 105 transitions. Word has length 56 [2021-11-19 14:17:55,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:55,065 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 105 transitions. [2021-11-19 14:17:55,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:17:55,066 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 105 transitions. [2021-11-19 14:17:55,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 14:17:55,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:55,068 INFO L514 BasicCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:55,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-19 14:17:55,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:55,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:55,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:17:55,676 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:55,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:55,677 INFO L85 PathProgramCache]: Analyzing trace with hash 197656611, now seen corresponding path program 2 times [2021-11-19 14:17:55,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:55,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [250649969] [2021-11-19 14:17:55,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:17:55,678 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:55,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:55,679 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:55,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:17:56,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:17:56,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:17:56,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:17:56,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:17:56,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:57,052 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:17:57,052 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:57,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [250649969] [2021-11-19 14:17:57,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [250649969] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:17:57,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1657760025] [2021-11-19 14:17:57,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:17:57,053 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:17:57,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:17:57,059 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:17:57,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-19 14:17:57,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:17:57,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:17:57,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:17:57,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:57,952 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:17:57,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:17:58,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1657760025] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:17:58,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288983249] [2021-11-19 14:17:58,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:17:58,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:17:58,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:17:58,274 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:17:58,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 14:17:58,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:17:58,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:17:58,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:17:58,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:59,138 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:17:59,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:18:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:18:00,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288983249] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:18:00,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:18:00,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 26 [2021-11-19 14:18:00,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111455937] [2021-11-19 14:18:00,300 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:18:00,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-19 14:18:00,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:18:00,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-19 14:18:00,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-11-19 14:18:00,302 INFO L87 Difference]: Start difference. First operand 87 states and 105 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 2 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:18:02,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:18:02,215 INFO L93 Difference]: Finished difference Result 160 states and 199 transitions. [2021-11-19 14:18:02,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 14:18:02,216 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 2 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2021-11-19 14:18:02,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:18:02,218 INFO L225 Difference]: With dead ends: 160 [2021-11-19 14:18:02,218 INFO L226 Difference]: Without dead ends: 95 [2021-11-19 14:18:02,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 14:18:02,221 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 58 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:18:02,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 903 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:18:02,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-19 14:18:02,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-11-19 14:18:02,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 69 states have internal predecessors, (76), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-11-19 14:18:02,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 113 transitions. [2021-11-19 14:18:02,234 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 113 transitions. Word has length 60 [2021-11-19 14:18:02,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:18:02,235 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 113 transitions. [2021-11-19 14:18:02,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 2 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:18:02,236 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 113 transitions. [2021-11-19 14:18:02,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 14:18:02,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:18:02,238 INFO L514 BasicCegarLoop]: trace histogram [14, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:18:02,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:18:02,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:18:02,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:18:02,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:18:02,843 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:18:02,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:18:02,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1223737251, now seen corresponding path program 3 times [2021-11-19 14:18:02,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:18:02,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162099288] [2021-11-19 14:18:02,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:18:02,844 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:18:02,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:18:02,851 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:18:02,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:18:03,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-19 14:18:03,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:18:03,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:18:03,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:18:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:18:03,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:18:06,567 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:18:06,567 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:18:06,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162099288] [2021-11-19 14:18:06,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162099288] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:18:06,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1821678518] [2021-11-19 14:18:06,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:18:06,568 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:18:06,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:18:06,571 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:18:06,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-19 14:18:07,269 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 14:18:07,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217756806] [2021-11-19 14:18:07,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:18:07,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:18:07,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:18:07,272 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:18:07,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 1 [2021-11-19 14:18:07,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-19 14:22:17,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-19 14:22:17,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:22:17,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:22:17,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:22:17,804 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:22:17,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:22:18,541 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:22:18,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217756806] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:22:18,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-19 14:22:18,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18] total 34 [2021-11-19 14:22:18,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096257301] [2021-11-19 14:22:18,542 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-19 14:22:18,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-19 14:22:18,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:22:18,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-19 14:22:18,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=814, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 14:22:18,544 INFO L87 Difference]: Start difference. First operand 95 states and 113 transitions. Second operand has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:22:28,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:22:28,271 INFO L93 Difference]: Finished difference Result 176 states and 223 transitions. [2021-11-19 14:22:28,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 14:22:28,273 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 68 [2021-11-19 14:22:28,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:22:28,275 INFO L225 Difference]: With dead ends: 176 [2021-11-19 14:22:28,275 INFO L226 Difference]: Without dead ends: 111 [2021-11-19 14:22:28,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=722, Invalid=1728, Unknown=0, NotChecked=0, Total=2450 [2021-11-19 14:22:28,278 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 150 mSDsluCounter, 1461 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:22:28,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 1544 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:22:28,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-19 14:22:28,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-11-19 14:22:28,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 85 states have internal predecessors, (93), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-11-19 14:22:28,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2021-11-19 14:22:28,291 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 68 [2021-11-19 14:22:28,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:22:28,292 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2021-11-19 14:22:28,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:22:28,292 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2021-11-19 14:22:28,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-19 14:22:28,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:22:28,294 INFO L514 BasicCegarLoop]: trace histogram [16, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:22:28,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:22:28,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-19 14:22:28,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:22:28,723 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:22:28,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:22:28,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1778826365, now seen corresponding path program 4 times [2021-11-19 14:22:28,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:22:28,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488325865] [2021-11-19 14:22:28,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:22:28,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:22:28,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:22:28,725 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:22:28,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:22:29,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:22:29,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:22:29,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-19 14:22:29,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:22:29,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-11-19 14:22:29,316 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-11-19 14:22:29,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-19 14:22:29,446 INFO L354 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-11-19 14:22:29,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2021-11-19 14:22:29,668 INFO L354 Elim1Store]: treesize reduction 107, result has 19.5 percent of original size [2021-11-19 14:22:29,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 48 [2021-11-19 14:22:29,927 INFO L354 Elim1Store]: treesize reduction 176, result has 16.6 percent of original size [2021-11-19 14:22:29,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 62 [2021-11-19 14:22:30,279 INFO L354 Elim1Store]: treesize reduction 241, result has 15.4 percent of original size [2021-11-19 14:22:30,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 74 [2021-11-19 14:22:30,689 INFO L354 Elim1Store]: treesize reduction 338, result has 13.6 percent of original size [2021-11-19 14:22:30,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 74 treesize of output 88 [2021-11-19 14:22:31,255 INFO L354 Elim1Store]: treesize reduction 423, result has 12.8 percent of original size [2021-11-19 14:22:31,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 83 treesize of output 100 [2021-11-19 14:22:31,971 INFO L354 Elim1Store]: treesize reduction 532, result has 11.8 percent of original size [2021-11-19 14:22:31,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 113 [2021-11-19 14:22:32,871 INFO L354 Elim1Store]: treesize reduction 671, result has 10.7 percent of original size [2021-11-19 14:22:32,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 104 treesize of output 127 [2021-11-19 14:22:33,984 INFO L354 Elim1Store]: treesize reduction 818, result has 9.9 percent of original size [2021-11-19 14:22:33,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 115 treesize of output 141 [2021-11-19 14:22:35,308 INFO L354 Elim1Store]: treesize reduction 979, result has 9.3 percent of original size [2021-11-19 14:22:35,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 126 treesize of output 155 [2021-11-19 14:22:36,989 INFO L354 Elim1Store]: treesize reduction 1154, result has 8.7 percent of original size [2021-11-19 14:22:36,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 137 treesize of output 169 [2021-11-19 14:22:38,876 INFO L354 Elim1Store]: treesize reduction 1343, result has 8.2 percent of original size [2021-11-19 14:22:38,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 91 case distinctions, treesize of input 148 treesize of output 183 [2021-11-19 14:22:41,046 INFO L354 Elim1Store]: treesize reduction 1546, result has 7.8 percent of original size [2021-11-19 14:22:41,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 159 treesize of output 197 [2021-11-19 14:22:43,625 INFO L354 Elim1Store]: treesize reduction 1631, result has 7.6 percent of original size [2021-11-19 14:22:43,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 120 case distinctions, treesize of input 163 treesize of output 204 [2021-11-19 14:22:48,579 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:22:48,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:25:00,066 WARN L227 SmtUtils]: Spent 2.17m on a formula simplification that was a NOOP. DAG size: 151 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-19 14:25:00,311 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 85 treesize of output 83 [2021-11-19 14:25:47,167 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 118 treesize of output 116 [2021-11-19 14:25:47,176 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 1310701 treesize of output 1310699 [2021-11-19 14:26:05,765 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 120 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:26:05,765 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:26:05,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488325865] [2021-11-19 14:26:05,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488325865] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:26:05,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [215464565] [2021-11-19 14:26:05,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:26:05,766 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:26:05,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:26:05,772 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:26:05,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 14:26:06,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:26:06,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:26:06,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-19 14:26:06,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:06,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-11-19 14:26:06,594 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-11-19 14:26:06,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-11-19 14:26:06,695 INFO L354 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-11-19 14:26:06,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2021-11-19 14:26:06,803 INFO L354 Elim1Store]: treesize reduction 118, result has 18.6 percent of original size [2021-11-19 14:26:06,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2021-11-19 14:26:07,038 INFO L354 Elim1Store]: treesize reduction 176, result has 16.6 percent of original size [2021-11-19 14:26:07,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 62 [2021-11-19 14:26:07,280 INFO L354 Elim1Store]: treesize reduction 258, result has 14.9 percent of original size [2021-11-19 14:26:07,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2021-11-19 14:26:07,711 INFO L354 Elim1Store]: treesize reduction 338, result has 13.6 percent of original size [2021-11-19 14:26:07,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 74 treesize of output 88 [2021-11-19 14:26:08,124 INFO L354 Elim1Store]: treesize reduction 423, result has 12.8 percent of original size [2021-11-19 14:26:08,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 83 treesize of output 100 [2021-11-19 14:26:08,801 INFO L354 Elim1Store]: treesize reduction 532, result has 11.8 percent of original size [2021-11-19 14:26:08,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 113 [2021-11-19 14:26:09,534 INFO L354 Elim1Store]: treesize reduction 671, result has 10.7 percent of original size [2021-11-19 14:26:09,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 104 treesize of output 127 [2021-11-19 14:26:10,289 INFO L354 Elim1Store]: treesize reduction 818, result has 9.9 percent of original size [2021-11-19 14:26:10,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 115 treesize of output 141 [2021-11-19 14:26:11,268 INFO L354 Elim1Store]: treesize reduction 931, result has 9.5 percent of original size [2021-11-19 14:26:11,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 123 treesize of output 152 [2021-11-19 14:26:12,699 INFO L354 Elim1Store]: treesize reduction 1154, result has 8.7 percent of original size [2021-11-19 14:26:12,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 137 treesize of output 169 [2021-11-19 14:26:14,104 INFO L354 Elim1Store]: treesize reduction 1343, result has 8.2 percent of original size [2021-11-19 14:26:14,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 91 case distinctions, treesize of input 148 treesize of output 183 [2021-11-19 14:26:15,831 INFO L354 Elim1Store]: treesize reduction 1546, result has 7.8 percent of original size [2021-11-19 14:26:15,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 159 treesize of output 197 [2021-11-19 14:26:17,861 INFO L354 Elim1Store]: treesize reduction 1631, result has 7.6 percent of original size [2021-11-19 14:26:17,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 120 case distinctions, treesize of input 163 treesize of output 204 [2021-11-19 14:26:20,126 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:26:20,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:28:31,557 WARN L227 SmtUtils]: Spent 2.19m on a formula simplification that was a NOOP. DAG size: 151 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-19 14:28:31,917 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 85 treesize of output 83 [2021-11-19 14:28:32,279 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 118 treesize of output 116 [2021-11-19 14:28:32,289 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 1310697 treesize of output 1310695 [2021-11-19 14:28:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 120 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:28:50,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [215464565] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:28:50,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612582622] [2021-11-19 14:28:50,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:28:50,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:28:50,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:28:50,859 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:28:50,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f95fd9-e2c1-456d-9518-3b9c56c368af/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-19 14:28:51,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:28:51,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:28:51,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-19 14:28:51,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:28:51,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-11-19 14:28:51,200 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-11-19 14:28:51,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-19 14:28:51,520 INFO L354 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-11-19 14:28:51,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2021-11-19 14:28:51,999 INFO L354 Elim1Store]: treesize reduction 107, result has 19.5 percent of original size [2021-11-19 14:28:52,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 48 [2021-11-19 14:28:52,487 INFO L354 Elim1Store]: treesize reduction 168, result has 17.2 percent of original size [2021-11-19 14:28:52,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 61 [2021-11-19 14:28:53,089 INFO L354 Elim1Store]: treesize reduction 251, result has 14.9 percent of original size [2021-11-19 14:28:53,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 64 treesize of output 75 [2021-11-19 14:28:53,889 INFO L354 Elim1Store]: treesize reduction 326, result has 14.0 percent of original size [2021-11-19 14:28:53,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 73 treesize of output 87 [2021-11-19 14:28:54,778 INFO L354 Elim1Store]: treesize reduction 423, result has 12.8 percent of original size [2021-11-19 14:28:54,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 83 treesize of output 100 [2021-11-19 14:28:55,977 INFO L354 Elim1Store]: treesize reduction 532, result has 11.8 percent of original size [2021-11-19 14:28:55,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 113 [2021-11-19 14:28:57,197 INFO L354 Elim1Store]: treesize reduction 671, result has 10.7 percent of original size [2021-11-19 14:28:57,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 104 treesize of output 127 [2021-11-19 14:28:58,696 INFO L354 Elim1Store]: treesize reduction 786, result has 10.2 percent of original size [2021-11-19 14:28:58,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 113 treesize of output 139 [2021-11-19 14:29:00,494 INFO L354 Elim1Store]: treesize reduction 953, result has 9.3 percent of original size [2021-11-19 14:29:00,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 124 treesize of output 153 [2021-11-19 14:29:02,423 INFO L354 Elim1Store]: treesize reduction 1126, result has 8.8 percent of original size [2021-11-19 14:29:02,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 135 treesize of output 167 [2021-11-19 14:29:05,033 INFO L354 Elim1Store]: treesize reduction 1313, result has 8.2 percent of original size [2021-11-19 14:29:05,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 91 case distinctions, treesize of input 146 treesize of output 181 [2021-11-19 14:29:07,824 INFO L354 Elim1Store]: treesize reduction 1514, result has 7.8 percent of original size [2021-11-19 14:29:07,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 157 treesize of output 195 [2021-11-19 14:29:11,028 INFO L354 Elim1Store]: treesize reduction 1729, result has 7.4 percent of original size [2021-11-19 14:29:11,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 120 case distinctions, treesize of input 168 treesize of output 209 [2021-11-19 14:29:15,968 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:29:15,968 INFO L328 TraceCheckSpWp]: Computing backward predicates...