./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF --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 f57bc64edf303a057c8eafb48480d4e5b764bd411481261d53eb2a101eb82ae8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:40:28,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:40:28,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:40:28,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:40:28,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:40:28,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:40:28,119 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:40:28,123 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:40:28,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:40:28,136 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:40:28,137 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:40:28,139 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:40:28,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:40:28,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:40:28,145 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:40:28,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:40:28,155 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:40:28,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:40:28,159 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:40:28,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:40:28,171 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:40:28,173 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:40:28,176 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:40:28,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:40:28,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:40:28,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:40:28,190 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:40:28,192 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:40:28,193 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:40:28,194 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:40:28,195 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:40:28,196 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:40:28,198 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:40:28,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:40:28,201 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:40:28,202 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:40:28,202 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:40:28,203 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:40:28,203 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:40:28,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:40:28,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:40:28,206 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 22:40:28,254 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:40:28,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:40:28,256 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:40:28,257 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:40:28,257 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:40:28,257 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:40:28,257 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:40:28,258 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:40:28,265 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:40:28,265 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:40:28,267 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:40:28,267 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:40:28,267 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:40:28,268 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:40:28,268 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:40:28,268 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:40:28,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:40:28,270 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:40:28,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:40:28,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:40:28,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:40:28,271 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:40:28,271 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:40:28,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:40:28,272 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:40:28,272 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:40:28,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:40:28,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:40:28,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:40:28,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:40:28,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:40:28,274 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:40:28,274 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:40:28,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:40:28,275 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:40:28,275 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:40:28,275 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:40:28,276 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_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f57bc64edf303a057c8eafb48480d4e5b764bd411481261d53eb2a101eb82ae8 [2021-11-12 22:40:28,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:40:28,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:40:28,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:40:28,682 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:40:28,683 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:40:28,685 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i [2021-11-12 22:40:28,769 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/data/fa4b18148/a75797d7b7424a7daefb69b42204b240/FLAG2dfb4754b [2021-11-12 22:40:29,695 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:40:29,696 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i [2021-11-12 22:40:29,745 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/data/fa4b18148/a75797d7b7424a7daefb69b42204b240/FLAG2dfb4754b [2021-11-12 22:40:30,231 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/data/fa4b18148/a75797d7b7424a7daefb69b42204b240 [2021-11-12 22:40:30,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:40:30,240 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:40:30,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:40:30,244 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:40:30,248 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:40:30,248 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:40:30" (1/1) ... [2021-11-12 22:40:30,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76132558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:30, skipping insertion in model container [2021-11-12 22:40:30,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:40:30" (1/1) ... [2021-11-12 22:40:30,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:40:30,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:40:30,723 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4494,4507] [2021-11-12 22:40:30,731 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4554,4567] [2021-11-12 22:40:30,762 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:40:30,771 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:40:31,708 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:31,714 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:31,714 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:31,718 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:31,720 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:31,740 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:31,743 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:31,745 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:31,751 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:31,754 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:31,755 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:31,756 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:31,756 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:32,165 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:40:32,166 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:40:32,168 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:40:32,169 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:40:32,178 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:40:32,179 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:40:32,182 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:40:32,183 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:40:32,185 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:40:32,202 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:40:32,404 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:40:32,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:40:32,458 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) [2021-11-12 22:40:32,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@37dd7bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:32, skipping insertion in model container [2021-11-12 22:40:32,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:40:32,459 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:40:32,461 INFO L158 Benchmark]: Toolchain (without parser) took 2220.65ms. Allocated memory is still 113.2MB. Free memory was 67.2MB in the beginning and 80.3MB in the end (delta: -13.1MB). Peak memory consumption was 25.4MB. Max. memory is 16.1GB. [2021-11-12 22:40:32,468 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 113.2MB. Free memory is still 90.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:40:32,469 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2215.73ms. Allocated memory is still 113.2MB. Free memory was 67.0MB in the beginning and 80.3MB in the end (delta: -13.4MB). Peak memory consumption was 25.4MB. Max. memory is 16.1GB. [2021-11-12 22:40:32,470 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 113.2MB. Free memory is still 90.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2215.73ms. Allocated memory is still 113.2MB. Free memory was 67.0MB in the beginning and 80.3MB in the end (delta: -13.4MB). Peak memory consumption was 25.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7037]: 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_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF --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 f57bc64edf303a057c8eafb48480d4e5b764bd411481261d53eb2a101eb82ae8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:40:35,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:40:35,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:40:35,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:40:35,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:40:35,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:40:35,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:40:35,084 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:40:35,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:40:35,099 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:40:35,101 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:40:35,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:40:35,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:40:35,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:40:35,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:40:35,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:40:35,115 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:40:35,116 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:40:35,119 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:40:35,128 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:40:35,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:40:35,132 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:40:35,135 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:40:35,136 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:40:35,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:40:35,146 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:40:35,146 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:40:35,148 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:40:35,149 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:40:35,150 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:40:35,150 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:40:35,151 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:40:35,153 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:40:35,154 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:40:35,156 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:40:35,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:40:35,157 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:40:35,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:40:35,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:40:35,159 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:40:35,160 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:40:35,161 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 22:40:35,203 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:40:35,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:40:35,204 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:40:35,205 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:40:35,205 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:40:35,205 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:40:35,205 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:40:35,206 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:40:35,206 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:40:35,206 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:40:35,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:40:35,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:40:35,209 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:40:35,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:40:35,209 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:40:35,210 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:40:35,210 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:40:35,210 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:40:35,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:40:35,211 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:40:35,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:40:35,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:40:35,211 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:40:35,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:40:35,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:40:35,212 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:40:35,212 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:40:35,212 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:40:35,213 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:40:35,213 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:40:35,213 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:40:35,213 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:40:35,214 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:40:35,214 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_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f57bc64edf303a057c8eafb48480d4e5b764bd411481261d53eb2a101eb82ae8 [2021-11-12 22:40:35,635 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:40:35,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:40:35,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:40:35,659 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:40:35,660 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:40:35,661 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i [2021-11-12 22:40:35,727 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/data/cbc273d97/6913fb8666224b11a577c9c5ddef9f00/FLAGd3085b98c [2021-11-12 22:40:36,579 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:40:36,580 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i [2021-11-12 22:40:36,622 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/data/cbc273d97/6913fb8666224b11a577c9c5ddef9f00/FLAGd3085b98c [2021-11-12 22:40:36,650 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/data/cbc273d97/6913fb8666224b11a577c9c5ddef9f00 [2021-11-12 22:40:36,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:40:36,654 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:40:36,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:40:36,657 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:40:36,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:40:36,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:40:36" (1/1) ... [2021-11-12 22:40:36,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@679cba3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:36, skipping insertion in model container [2021-11-12 22:40:36,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:40:36" (1/1) ... [2021-11-12 22:40:36,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:40:36,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:40:37,058 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4494,4507] [2021-11-12 22:40:37,064 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4554,4567] [2021-11-12 22:40:37,087 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:40:37,092 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:40:38,351 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:38,352 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:38,353 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:38,354 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:38,355 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:38,380 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:38,382 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:38,386 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:38,387 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:38,390 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:38,391 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:38,392 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:38,393 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:38,896 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:40:38,897 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:40:38,898 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:40:38,900 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:40:38,903 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:40:38,904 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:40:38,904 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:40:38,905 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:40:38,909 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:40:38,910 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:40:39,081 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:40:39,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:40:39,133 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:40:39,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:40:39,183 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4494,4507] [2021-11-12 22:40:39,184 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4554,4567] [2021-11-12 22:40:39,185 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:40:39,185 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:40:39,237 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:39,238 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:39,238 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:39,239 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:39,239 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:39,246 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:39,246 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:39,247 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:39,248 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:39,249 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:39,249 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:39,250 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:39,250 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:39,299 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:40:39,300 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:40:39,301 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:40:39,301 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:40:39,302 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:40:39,303 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:40:39,303 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:40:39,304 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:40:39,304 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:40:39,305 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:40:39,324 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:40:39,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:40:39,344 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:40:39,357 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4494,4507] [2021-11-12 22:40:39,358 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4554,4567] [2021-11-12 22:40:39,359 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:40:39,360 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:40:39,399 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:39,400 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:39,400 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:39,400 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:39,401 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:39,406 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:39,407 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:39,408 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:39,408 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:39,409 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:39,410 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:39,410 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:39,410 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:40:39,458 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:40:39,459 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:40:39,460 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:40:39,461 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:40:39,461 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:40:39,462 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:40:39,463 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:40:39,463 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:40:39,463 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:40:39,464 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:40:39,484 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:40:39,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:40:39,763 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:40:39,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:39 WrapperNode [2021-11-12 22:40:39,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:40:39,764 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:40:39,765 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:40:39,765 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:40:39,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:39" (1/1) ... [2021-11-12 22:40:39,874 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:39" (1/1) ... [2021-11-12 22:40:39,915 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:40:39,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:40:39,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:40:39,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:40:39,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:39" (1/1) ... [2021-11-12 22:40:39,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:39" (1/1) ... [2021-11-12 22:40:39,929 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:39" (1/1) ... [2021-11-12 22:40:39,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:39" (1/1) ... [2021-11-12 22:40:39,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:39" (1/1) ... [2021-11-12 22:40:39,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:39" (1/1) ... [2021-11-12 22:40:39,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:39" (1/1) ... [2021-11-12 22:40:39,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:40:39,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:40:39,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:40:39,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:40:39,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:39" (1/1) ... [2021-11-12 22:40:39,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:40:39,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:40:40,015 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:40:40,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:40:40,084 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_back [2021-11-12 22:40:40,084 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_back [2021-11-12 22:40:40,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:40:40,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:40:40,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 22:40:40,084 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 22:40:40,084 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-12 22:40:40,084 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-12 22:40:40,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:40:40,085 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-12 22:40:40,085 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-12 22:40:40,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 22:40:40,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:40:40,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:40:40,085 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2021-11-12 22:40:40,085 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2021-11-12 22:40:40,085 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 22:40:40,086 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 22:40:40,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:40:40,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 22:40:40,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 22:40:40,086 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-12 22:40:40,086 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-12 22:40:40,086 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-11-12 22:40:40,086 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-11-12 22:40:40,833 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:40:40,833 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-12 22:40:40,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:40:40 BoogieIcfgContainer [2021-11-12 22:40:40,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:40:40,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:40:40,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:40:40,843 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:40:40,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:40:36" (1/3) ... [2021-11-12 22:40:40,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d7e766 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:40:40, skipping insertion in model container [2021-11-12 22:40:40,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:39" (2/3) ... [2021-11-12 22:40:40,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d7e766 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:40:40, skipping insertion in model container [2021-11-12 22:40:40,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:40:40" (3/3) ... [2021-11-12 22:40:40,855 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_back_harness.i [2021-11-12 22:40:40,861 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:40:40,862 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:40:40,930 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:40:40,941 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 [2021-11-12 22:40:40,946 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:40:40,967 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 64 states have (on average 1.296875) internal successors, (83), 65 states have internal predecessors, (83), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-12 22:40:40,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-12 22:40:40,978 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:40,979 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:40,980 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:40,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:40,985 INFO L85 PathProgramCache]: Analyzing trace with hash 464723229, now seen corresponding path program 1 times [2021-11-12 22:40:41,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:40:41,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825635202] [2021-11-12 22:40:41,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:41,002 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:40:41,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:40:41,005 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:40:41,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:40:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:41,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:40:41,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 22:40:41,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:41,699 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-12 22:40:41,700 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:40:41,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825635202] [2021-11-12 22:40:41,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825635202] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:40:41,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:40:41,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-12 22:40:41,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088229932] [2021-11-12 22:40:41,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:41,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:40:41,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:41,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:40:41,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:40:41,750 INFO L87 Difference]: Start difference. First operand has 98 states, 64 states have (on average 1.296875) internal successors, (83), 65 states have internal predecessors, (83), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:40:41,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:41,784 INFO L93 Difference]: Finished difference Result 188 states and 271 transitions. [2021-11-12 22:40:41,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:40:41,786 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 84 [2021-11-12 22:40:41,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:41,794 INFO L225 Difference]: With dead ends: 188 [2021-11-12 22:40:41,794 INFO L226 Difference]: Without dead ends: 93 [2021-11-12 22:40:41,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:40:41,802 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.76ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:41,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 1.76ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:40:41,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-12 22:40:41,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-11-12 22:40:41,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.25) internal successors, (75), 61 states have internal predecessors, (75), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-12 22:40:41,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2021-11-12 22:40:41,849 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 84 [2021-11-12 22:40:41,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:41,850 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2021-11-12 22:40:41,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:40:41,850 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2021-11-12 22:40:41,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-12 22:40:41,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:41,854 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:41,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:42,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:40:42,071 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:42,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:42,072 INFO L85 PathProgramCache]: Analyzing trace with hash 463621205, now seen corresponding path program 1 times [2021-11-12 22:40:42,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:40:42,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1231141904] [2021-11-12 22:40:42,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:42,073 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:40:42,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:40:42,074 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:40:42,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:40:42,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:42,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:40:42,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:42,516 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:40:42,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-12 22:40:42,740 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:40:42,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1231141904] [2021-11-12 22:40:42,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1231141904] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:40:42,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:40:42,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2021-11-12 22:40:42,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944299190] [2021-11-12 22:40:42,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:42,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:40:42,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:42,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:40:42,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:40:42,744 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 22:40:42,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:42,872 INFO L93 Difference]: Finished difference Result 169 states and 224 transitions. [2021-11-12 22:40:42,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:40:42,873 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 84 [2021-11-12 22:40:42,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:42,879 INFO L225 Difference]: With dead ends: 169 [2021-11-12 22:40:42,879 INFO L226 Difference]: Without dead ends: 95 [2021-11-12 22:40:42,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:40:42,885 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 2 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.12ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 70.74ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:42,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 563 Invalid, 41 Unknown, 0 Unchecked, 8.12ms Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 70.74ms Time] [2021-11-12 22:40:42,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-12 22:40:42,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-11-12 22:40:42,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 63 states have internal predecessors, (76), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2021-11-12 22:40:42,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 125 transitions. [2021-11-12 22:40:42,917 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 125 transitions. Word has length 84 [2021-11-12 22:40:42,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:42,918 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 125 transitions. [2021-11-12 22:40:42,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 22:40:42,918 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 125 transitions. [2021-11-12 22:40:42,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-12 22:40:42,928 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:42,929 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:42,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:43,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:40:43,130 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:43,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:43,130 INFO L85 PathProgramCache]: Analyzing trace with hash -583798319, now seen corresponding path program 1 times [2021-11-12 22:40:43,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:40:43,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419571863] [2021-11-12 22:40:43,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:43,132 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:40:43,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:40:43,133 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:40:43,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:40:43,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:43,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:40:43,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:40:43,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-12 22:40:44,054 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:40:44,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419571863] [2021-11-12 22:40:44,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419571863] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:40:44,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:40:44,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2021-11-12 22:40:44,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387345641] [2021-11-12 22:40:44,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:44,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:40:44,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:44,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:40:44,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:40:44,057 INFO L87 Difference]: Start difference. First operand 95 states and 125 transitions. Second operand has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-12 22:40:44,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:44,367 INFO L93 Difference]: Finished difference Result 174 states and 231 transitions. [2021-11-12 22:40:44,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:40:44,369 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 86 [2021-11-12 22:40:44,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:44,371 INFO L225 Difference]: With dead ends: 174 [2021-11-12 22:40:44,371 INFO L226 Difference]: Without dead ends: 95 [2021-11-12 22:40:44,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:40:44,373 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 50 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 201.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.76ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 239.55ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:44,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 663 Invalid, 133 Unknown, 0 Unchecked, 5.76ms Time], IncrementalHoareTripleChecker [24 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 239.55ms Time] [2021-11-12 22:40:44,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-12 22:40:44,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-11-12 22:40:44,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 63 states have internal predecessors, (75), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2021-11-12 22:40:44,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 124 transitions. [2021-11-12 22:40:44,392 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 124 transitions. Word has length 86 [2021-11-12 22:40:44,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:44,397 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 124 transitions. [2021-11-12 22:40:44,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-12 22:40:44,397 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 124 transitions. [2021-11-12 22:40:44,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-12 22:40:44,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:44,400 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:44,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:44,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:40:44,617 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:44,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:44,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1801781246, now seen corresponding path program 1 times [2021-11-12 22:40:44,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:40:44,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715999740] [2021-11-12 22:40:44,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:44,619 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:40:44,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:40:44,620 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:40:44,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:40:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:44,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:40:44,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:40:45,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:45,514 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-12 22:40:45,515 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:40:45,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715999740] [2021-11-12 22:40:45,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715999740] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:40:45,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:40:45,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 12 [2021-11-12 22:40:45,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022581297] [2021-11-12 22:40:45,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:45,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:40:45,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:45,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:40:45,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:40:45,517 INFO L87 Difference]: Start difference. First operand 95 states and 124 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-12 22:40:45,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:45,877 INFO L93 Difference]: Finished difference Result 183 states and 244 transitions. [2021-11-12 22:40:45,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:40:45,881 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 88 [2021-11-12 22:40:45,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:45,883 INFO L225 Difference]: With dead ends: 183 [2021-11-12 22:40:45,883 INFO L226 Difference]: Without dead ends: 103 [2021-11-12 22:40:45,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:40:45,884 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 76 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 231.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.71ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 269.92ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:45,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 752 Invalid, 175 Unknown, 0 Unchecked, 5.71ms Time], IncrementalHoareTripleChecker [32 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 269.92ms Time] [2021-11-12 22:40:45,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-12 22:40:45,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2021-11-12 22:40:45,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 64 states have internal predecessors, (76), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2021-11-12 22:40:45,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 125 transitions. [2021-11-12 22:40:45,896 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 125 transitions. Word has length 88 [2021-11-12 22:40:45,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:45,896 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 125 transitions. [2021-11-12 22:40:45,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-12 22:40:45,897 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 125 transitions. [2021-11-12 22:40:45,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-12 22:40:45,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:45,898 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:45,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:46,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:40:46,113 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:46,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:46,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1442434984, now seen corresponding path program 1 times [2021-11-12 22:40:46,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:40:46,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1914017139] [2021-11-12 22:40:46,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:46,115 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:40:46,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:40:46,116 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:40:46,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:40:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:46,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:40:46,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 22:40:46,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:46,835 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-12 22:40:46,835 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:40:46,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1914017139] [2021-11-12 22:40:46,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1914017139] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:40:46,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:40:46,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [3] total 9 [2021-11-12 22:40:46,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60934415] [2021-11-12 22:40:46,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:46,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:40:46,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:46,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:40:46,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:40:46,837 INFO L87 Difference]: Start difference. First operand 96 states and 125 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-12 22:40:47,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:47,110 INFO L93 Difference]: Finished difference Result 179 states and 240 transitions. [2021-11-12 22:40:47,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:40:47,111 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 89 [2021-11-12 22:40:47,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:47,113 INFO L225 Difference]: With dead ends: 179 [2021-11-12 22:40:47,113 INFO L226 Difference]: Without dead ends: 102 [2021-11-12 22:40:47,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:40:47,114 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 58 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 157.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.77ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 198.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:47,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 561 Invalid, 127 Unknown, 0 Unchecked, 3.77ms Time], IncrementalHoareTripleChecker [29 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 198.00ms Time] [2021-11-12 22:40:47,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-12 22:40:47,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2021-11-12 22:40:47,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 65 states have internal predecessors, (77), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2021-11-12 22:40:47,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2021-11-12 22:40:47,127 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 89 [2021-11-12 22:40:47,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:47,127 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2021-11-12 22:40:47,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-12 22:40:47,128 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2021-11-12 22:40:47,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-12 22:40:47,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:47,129 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:47,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:47,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:40:47,342 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:47,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:47,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1734248118, now seen corresponding path program 1 times [2021-11-12 22:40:47,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:40:47,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821027985] [2021-11-12 22:40:47,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:47,344 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:40:47,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:40:47,345 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:40:47,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:40:47,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:47,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:40:47,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:47,797 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:40:47,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-12 22:40:48,029 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:40:48,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821027985] [2021-11-12 22:40:48,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1821027985] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:40:48,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:40:48,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-12 22:40:48,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597361389] [2021-11-12 22:40:48,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:48,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:40:48,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:48,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:40:48,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:40:48,032 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-12 22:40:48,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:48,130 INFO L93 Difference]: Finished difference Result 178 states and 233 transitions. [2021-11-12 22:40:48,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:40:48,132 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 97 [2021-11-12 22:40:48,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:48,135 INFO L225 Difference]: With dead ends: 178 [2021-11-12 22:40:48,135 INFO L226 Difference]: Without dead ends: 100 [2021-11-12 22:40:48,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:40:48,139 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 4 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.80ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 69.75ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:48,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 681 Invalid, 55 Unknown, 0 Unchecked, 2.80ms Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 69.75ms Time] [2021-11-12 22:40:48,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-12 22:40:48,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2021-11-12 22:40:48,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 64 states have (on average 1.21875) internal successors, (78), 66 states have internal predecessors, (78), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2021-11-12 22:40:48,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 127 transitions. [2021-11-12 22:40:48,157 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 127 transitions. Word has length 97 [2021-11-12 22:40:48,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:48,157 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 127 transitions. [2021-11-12 22:40:48,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-12 22:40:48,158 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 127 transitions. [2021-11-12 22:40:48,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-12 22:40:48,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:48,159 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:48,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:48,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:40:48,360 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:48,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:48,360 INFO L85 PathProgramCache]: Analyzing trace with hash 26119479, now seen corresponding path program 1 times [2021-11-12 22:40:48,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:40:48,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585568056] [2021-11-12 22:40:48,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:48,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:40:48,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:40:48,362 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:40:48,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:40:48,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:48,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-12 22:40:48,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:49,721 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 22:40:49,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-12 22:40:50,364 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:40:50,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585568056] [2021-11-12 22:40:50,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585568056] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:40:50,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1904549180] [2021-11-12 22:40:50,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:50,365 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:40:50,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:40:50,367 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:40:50,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-12 22:40:50,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:50,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:40:50,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:50,973 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 22:40:50,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:51,271 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-12 22:40:51,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1904549180] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:40:51,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:40:51,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10, 8, 8] total 23 [2021-11-12 22:40:51,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144389536] [2021-11-12 22:40:51,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:51,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:40:51,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:51,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:40:51,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-11-12 22:40:51,274 INFO L87 Difference]: Start difference. First operand 98 states and 127 transitions. Second operand has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-12 22:40:51,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:51,446 INFO L93 Difference]: Finished difference Result 183 states and 239 transitions. [2021-11-12 22:40:51,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:40:51,447 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 99 [2021-11-12 22:40:51,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:51,449 INFO L225 Difference]: With dead ends: 183 [2021-11-12 22:40:51,449 INFO L226 Difference]: Without dead ends: 104 [2021-11-12 22:40:51,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 370 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-11-12 22:40:51,451 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 8 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.08ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.39ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:51,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 783 Invalid, 70 Unknown, 0 Unchecked, 3.08ms Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 76.39ms Time] [2021-11-12 22:40:51,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-12 22:40:51,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2021-11-12 22:40:51,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 67 states have internal predecessors, (79), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2021-11-12 22:40:51,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 128 transitions. [2021-11-12 22:40:51,461 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 128 transitions. Word has length 99 [2021-11-12 22:40:51,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:51,462 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 128 transitions. [2021-11-12 22:40:51,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-12 22:40:51,462 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 128 transitions. [2021-11-12 22:40:51,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-12 22:40:51,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:51,463 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:51,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:51,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:51,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:40:51,867 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:51,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:51,868 INFO L85 PathProgramCache]: Analyzing trace with hash -2063472241, now seen corresponding path program 1 times [2021-11-12 22:40:51,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:40:51,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071221558] [2021-11-12 22:40:51,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:51,868 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:40:51,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:40:51,873 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:40:51,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:40:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:52,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-12 22:40:52,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:54,763 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((v_aws_linked_list_back_~list.base_BEFORE_CALL_6 (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_back_~list.base_BEFORE_CALL_6) (_ bv0 64)) (_ bv16 64)))) (exists ((v_aws_linked_list_back_~list.base_BEFORE_CALL_6 (_ BitVec 64))) (not (= v_aws_linked_list_back_~list.base_BEFORE_CALL_6 (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_back_~list.base_BEFORE_CALL_6) (_ bv0 64)))))) is different from true [2021-11-12 22:41:02,990 WARN L227 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:41:11,328 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:41:19,498 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:41:27,877 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:41:36,117 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:41:36,308 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:41:36,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:41:42,091 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-12 22:41:42,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-12 22:41:42,105 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-12 22:41:42,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2021-11-12 22:41:42,165 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-12 22:41:42,165 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:41:42,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071221558] [2021-11-12 22:41:42,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071221558] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:41:42,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [177381334] [2021-11-12 22:41:42,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:42,166 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:41:42,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:41:42,175 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:41:42,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-12 22:41:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:41:42,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-12 22:41:42,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:41:42,897 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-12 22:41:42,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-12 22:41:51,352 WARN L227 SmtUtils]: Spent 8.45s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-12 22:41:51,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:41:51,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 84 [2021-11-12 22:49:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 2 refuted. 21 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 22:49:31,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:49:34,909 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-12 22:49:34,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [177381334] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:49:34,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729210626] [2021-11-12 22:49:34,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:49:34,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:49:34,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:49:34,911 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:49:34,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-12 22:49:35,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:49:35,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 22:49:35,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:49:49,698 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 22:49:49,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:49:52,590 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:49:52,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2021-11-12 22:49:52,612 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-12 22:49:52,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-11-12 22:49:52,720 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-12 22:49:52,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729210626] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:49:52,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:49:52,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 17, 9, 14, 9] total 61 [2021-11-12 22:49:52,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395745997] [2021-11-12 22:49:52,720 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:49:52,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-12 22:49:52,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:49:52,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-12 22:49:52,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=3270, Unknown=16, NotChecked=116, Total=3660 [2021-11-12 22:49:52,725 INFO L87 Difference]: Start difference. First operand 99 states and 128 transitions. Second operand has 61 states, 55 states have (on average 4.363636363636363) internal successors, (240), 55 states have internal predecessors, (240), 24 states have call successors, (56), 13 states have call predecessors, (56), 20 states have return successors, (52), 20 states have call predecessors, (52), 22 states have call successors, (52) [2021-11-12 22:50:56,175 WARN L227 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:51:10,818 WARN L227 SmtUtils]: Spent 8.37s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:51:21,295 WARN L227 SmtUtils]: Spent 8.18s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:51:31,690 WARN L227 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:51:42,115 WARN L227 SmtUtils]: Spent 8.13s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:52:06,632 WARN L227 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:52:17,735 WARN L227 SmtUtils]: Spent 8.21s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:52:28,592 WARN L227 SmtUtils]: Spent 8.17s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:54:10,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:10,664 INFO L93 Difference]: Finished difference Result 390 states and 532 transitions. [2021-11-12 22:54:10,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-12 22:54:10,666 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 55 states have (on average 4.363636363636363) internal successors, (240), 55 states have internal predecessors, (240), 24 states have call successors, (56), 13 states have call predecessors, (56), 20 states have return successors, (52), 20 states have call predecessors, (52), 22 states have call successors, (52) Word has length 100 [2021-11-12 22:54:10,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:10,669 INFO L225 Difference]: With dead ends: 390 [2021-11-12 22:54:10,669 INFO L226 Difference]: Without dead ends: 292 [2021-11-12 22:54:10,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 657 GetRequests, 540 SyntacticMatches, 19 SemanticMatches, 98 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3141 ImplicationChecksByTransitivity, 380.8s TimeCoverageRelationStatistics Valid=682, Invalid=8933, Unknown=91, NotChecked=194, Total=9900 [2021-11-12 22:54:10,673 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 240 mSDsluCounter, 2624 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1953.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 2757 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.67ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 764 IncrementalHoareTripleChecker+Unchecked, 2267.83ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:10,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 2757 Invalid, 1316 Unknown, 0 Unchecked, 15.67ms Time], IncrementalHoareTripleChecker [4 Valid, 548 Invalid, 0 Unknown, 764 Unchecked, 2267.83ms Time] [2021-11-12 22:54:10,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-11-12 22:54:10,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 253. [2021-11-12 22:54:10,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 186 states have (on average 1.3010752688172043) internal successors, (242), 190 states have internal predecessors, (242), 42 states have call successors, (42), 21 states have call predecessors, (42), 24 states have return successors, (60), 41 states have call predecessors, (60), 41 states have call successors, (60) [2021-11-12 22:54:10,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 344 transitions. [2021-11-12 22:54:10,704 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 344 transitions. Word has length 100 [2021-11-12 22:54:10,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:10,705 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 344 transitions. [2021-11-12 22:54:10,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 55 states have (on average 4.363636363636363) internal successors, (240), 55 states have internal predecessors, (240), 24 states have call successors, (56), 13 states have call predecessors, (56), 20 states have return successors, (52), 20 states have call predecessors, (52), 22 states have call successors, (52) [2021-11-12 22:54:10,706 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 344 transitions. [2021-11-12 22:54:10,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-12 22:54:10,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:10,708 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:10,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:10,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-12 22:54:11,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:11,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:54:11,325 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:11,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:11,326 INFO L85 PathProgramCache]: Analyzing trace with hash 992920326, now seen corresponding path program 1 times [2021-11-12 22:54:11,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:11,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91313310] [2021-11-12 22:54:11,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:11,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:11,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:11,327 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:11,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:54:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:11,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 22:54:11,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:11,777 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-12 22:54:11,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-11-12 22:54:13,738 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-12 22:54:13,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:14,578 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 210 treesize of output 198 [2021-11-12 22:54:14,806 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-12 22:54:14,807 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:14,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91313310] [2021-11-12 22:54:14,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91313310] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:14,807 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:14,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 11] imperfect sequences [] total 21 [2021-11-12 22:54:14,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810536572] [2021-11-12 22:54:14,807 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:14,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-12 22:54:14,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:14,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-12 22:54:14,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:54:14,809 INFO L87 Difference]: Start difference. First operand 253 states and 344 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 19 states have internal predecessors, (104), 9 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2021-11-12 22:54:17,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:17,363 INFO L93 Difference]: Finished difference Result 649 states and 898 transitions. [2021-11-12 22:54:17,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-12 22:54:17,364 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 19 states have internal predecessors, (104), 9 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) Word has length 111 [2021-11-12 22:54:17,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:17,369 INFO L225 Difference]: With dead ends: 649 [2021-11-12 22:54:17,369 INFO L226 Difference]: Without dead ends: 536 [2021-11-12 22:54:17,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 190 SyntacticMatches, 12 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-11-12 22:54:17,371 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 132 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1826.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1500 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.60ms SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 238 IncrementalHoareTripleChecker+Unchecked, 2124.08ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:17,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 1500 Invalid, 909 Unknown, 0 Unchecked, 8.60ms Time], IncrementalHoareTripleChecker [52 Valid, 619 Invalid, 0 Unknown, 238 Unchecked, 2124.08ms Time] [2021-11-12 22:54:17,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-11-12 22:54:17,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 498. [2021-11-12 22:54:17,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 375 states have (on average 1.3066666666666666) internal successors, (490), 384 states have internal predecessors, (490), 77 states have call successors, (77), 39 states have call predecessors, (77), 45 states have return successors, (112), 74 states have call predecessors, (112), 76 states have call successors, (112) [2021-11-12 22:54:17,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 679 transitions. [2021-11-12 22:54:17,449 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 679 transitions. Word has length 111 [2021-11-12 22:54:17,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:17,450 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 679 transitions. [2021-11-12 22:54:17,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 19 states have internal predecessors, (104), 9 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2021-11-12 22:54:17,450 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 679 transitions. [2021-11-12 22:54:17,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-12 22:54:17,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:17,454 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:17,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:17,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:17,661 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:17,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:17,662 INFO L85 PathProgramCache]: Analyzing trace with hash 599893316, now seen corresponding path program 1 times [2021-11-12 22:54:17,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:17,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108345151] [2021-11-12 22:54:17,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:17,663 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:17,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:17,664 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:17,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:54:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:17,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-12 22:54:17,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:20,956 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 47 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 22:54:20,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:24,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:54:24,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2021-11-12 22:54:24,438 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-12 22:54:24,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-11-12 22:54:24,523 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-12 22:54:24,523 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:24,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108345151] [2021-11-12 22:54:24,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108345151] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:54:24,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1288399379] [2021-11-12 22:54:24,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:24,524 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:54:24,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:54:24,524 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:54:24,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 22:54:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:24,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-12 22:54:24,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:25,138 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-12 22:54:25,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-12 22:54:25,173 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-12 22:54:25,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-12 22:54:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 55 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 22:54:38,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-12 22:54:39,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1288399379] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:54:39,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405862819] [2021-11-12 22:54:39,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:39,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:54:39,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:54:39,404 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:54:39,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02db88ac-710d-460f-b9f9-108012841347/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-12 22:54:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:39,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 22:54:39,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:41,662 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 47 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 22:54:41,663 INFO L328 TraceCheckSpWp]: Computing backward predicates...