./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_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_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/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_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/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_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/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 5b917a1c951859368fb2463a158063964361d86aeab261c924186dc34055576d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:30:07,954 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:30:07,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:30:07,987 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:30:07,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:30:07,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:30:07,991 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:30:07,993 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:30:07,995 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:30:07,996 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:30:07,997 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:30:07,999 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:30:07,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:30:08,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:30:08,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:30:08,004 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:30:08,005 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:30:08,006 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:30:08,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:30:08,010 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:30:08,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:30:08,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:30:08,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:30:08,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:30:08,020 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:30:08,020 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:30:08,021 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:30:08,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:30:08,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:30:08,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:30:08,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:30:08,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:30:08,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:30:08,028 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:30:08,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:30:08,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:30:08,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:30:08,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:30:08,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:30:08,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:30:08,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:30:08,035 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 22:30:08,081 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:30:08,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:30:08,083 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:30:08,083 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:30:08,084 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:30:08,084 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:30:08,090 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:30:08,091 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:30:08,091 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:30:08,091 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:30:08,092 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:30:08,092 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:30:08,092 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:30:08,093 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:30:08,093 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:30:08,093 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:30:08,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:30:08,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:30:08,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:30:08,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:30:08,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:30:08,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:30:08,095 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:30:08,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:30:08,095 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:30:08,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:30:08,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:30:08,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:30:08,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:30:08,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:30:08,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:30:08,098 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:30:08,098 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:30:08,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:30:08,098 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:30:08,099 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:30:08,099 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:30:08,099 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_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b917a1c951859368fb2463a158063964361d86aeab261c924186dc34055576d [2021-11-12 22:30:08,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:30:08,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:30:08,384 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:30:08,385 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:30:08,386 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:30:08,388 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i [2021-11-12 22:30:08,477 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/data/6011a87e9/976e844c88a8416cbd8e8c877ea44290/FLAG81eaff805 [2021-11-12 22:30:09,258 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:30:09,259 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i [2021-11-12 22:30:09,313 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/data/6011a87e9/976e844c88a8416cbd8e8c877ea44290/FLAG81eaff805 [2021-11-12 22:30:09,788 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/data/6011a87e9/976e844c88a8416cbd8e8c877ea44290 [2021-11-12 22:30:09,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:30:09,792 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:30:09,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:30:09,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:30:09,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:30:09,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:30:09" (1/1) ... [2021-11-12 22:30:09,799 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b6cbb9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:30:09, skipping insertion in model container [2021-11-12 22:30:09,800 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:30:09" (1/1) ... [2021-11-12 22:30:09,807 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:30:09,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:30:10,162 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_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4494,4507] [2021-11-12 22:30:10,168 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_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4554,4567] [2021-11-12 22:30:10,186 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:30:10,191 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:30:10,859 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:10,860 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:10,861 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:10,862 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:10,863 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:10,875 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:10,876 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:10,878 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:10,879 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:10,881 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:10,882 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:10,883 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:10,884 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:11,216 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:30:11,217 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:30:11,219 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:30:11,220 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:30:11,222 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:30:11,223 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:30:11,224 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:30:11,224 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:30:11,225 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:30:11,226 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:30:11,364 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:30:11,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:30:11,406 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 22:30:11,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@50ecd6cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:30:11, skipping insertion in model container [2021-11-12 22:30:11,406 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:30:11,407 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:30:11,409 INFO L158 Benchmark]: Toolchain (without parser) took 1615.76ms. Allocated memory is still 119.5MB. Free memory was 80.0MB in the beginning and 64.2MB in the end (delta: 15.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-11-12 22:30:11,410 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 90.2MB. Free memory was 43.6MB in the beginning and 43.6MB in the end (delta: 40.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:30:11,411 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1613.14ms. Allocated memory is still 119.5MB. Free memory was 79.8MB in the beginning and 64.2MB in the end (delta: 15.7MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-11-12 22:30:11,412 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 90.2MB. Free memory was 43.6MB in the beginning and 43.6MB in the end (delta: 40.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1613.14ms. Allocated memory is still 119.5MB. Free memory was 79.8MB in the beginning and 64.2MB in the end (delta: 15.7MB). Peak memory consumption was 21.0MB. 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_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/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_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/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_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/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 5b917a1c951859368fb2463a158063964361d86aeab261c924186dc34055576d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:30:13,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:30:13,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:30:13,712 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:30:13,713 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:30:13,718 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:30:13,721 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:30:13,726 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:30:13,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:30:13,740 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:30:13,741 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:30:13,743 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:30:13,744 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:30:13,747 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:30:13,749 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:30:13,752 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:30:13,754 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:30:13,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:30:13,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:30:13,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:30:13,779 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:30:13,781 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:30:13,783 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:30:13,786 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:30:13,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:30:13,793 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:30:13,793 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:30:13,795 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:30:13,796 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:30:13,797 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:30:13,797 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:30:13,798 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:30:13,800 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:30:13,801 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:30:13,803 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:30:13,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:30:13,804 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:30:13,804 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:30:13,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:30:13,807 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:30:13,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:30:13,813 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 22:30:13,858 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:30:13,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:30:13,860 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:30:13,860 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:30:13,860 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:30:13,861 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:30:13,861 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:30:13,861 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:30:13,861 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:30:13,861 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:30:13,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:30:13,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:30:13,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:30:13,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:30:13,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:30:13,865 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:30:13,866 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:30:13,866 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:30:13,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:30:13,866 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:30:13,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:30:13,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:30:13,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:30:13,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:30:13,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:30:13,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:30:13,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:30:13,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:30:13,868 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:30:13,869 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:30:13,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:30:13,869 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:30:13,869 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:30:13,870 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_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b917a1c951859368fb2463a158063964361d86aeab261c924186dc34055576d [2021-11-12 22:30:14,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:30:14,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:30:14,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:30:14,262 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:30:14,263 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:30:14,264 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i [2021-11-12 22:30:14,337 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/data/787a683eb/a6f1cd403b9d4f90b95245e2e9cf8f08/FLAG09378f9fc [2021-11-12 22:30:15,217 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:30:15,218 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i [2021-11-12 22:30:15,262 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/data/787a683eb/a6f1cd403b9d4f90b95245e2e9cf8f08/FLAG09378f9fc [2021-11-12 22:30:15,766 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/data/787a683eb/a6f1cd403b9d4f90b95245e2e9cf8f08 [2021-11-12 22:30:15,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:30:15,774 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:30:15,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:30:15,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:30:15,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:30:15,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:30:15" (1/1) ... [2021-11-12 22:30:15,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7298ef5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:30:15, skipping insertion in model container [2021-11-12 22:30:15,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:30:15" (1/1) ... [2021-11-12 22:30:15,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:30:15,906 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:30:16,227 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_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4494,4507] [2021-11-12 22:30:16,233 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_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4554,4567] [2021-11-12 22:30:16,251 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:30:16,256 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:30:17,009 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:17,010 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:17,010 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:17,011 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:17,012 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:17,026 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:17,027 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:17,029 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:17,030 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:17,032 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:17,033 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:17,033 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:17,034 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:17,423 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:30:17,424 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:30:17,425 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:30:17,427 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:30:17,428 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:30:17,429 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:30:17,430 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:30:17,431 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:30:17,431 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:30:17,432 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:30:17,610 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:30:17,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:30:17,685 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:30:17,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:30:17,734 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_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4494,4507] [2021-11-12 22:30:17,738 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_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4554,4567] [2021-11-12 22:30:17,739 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:30:17,741 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:30:17,786 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:17,786 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:17,787 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:17,787 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:17,788 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:17,797 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:17,797 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:17,798 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:17,799 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:17,800 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:17,801 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:17,802 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:17,802 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:17,858 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:30:17,859 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:30:17,859 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:30:17,864 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:30:17,865 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:30:17,871 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:30:17,872 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:30:17,873 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:30:17,873 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:30:17,874 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:30:17,915 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:30:17,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:30:17,953 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:30:17,977 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_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4494,4507] [2021-11-12 22:30:17,982 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_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4554,4567] [2021-11-12 22:30:17,984 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:30:17,996 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:30:18,044 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:18,045 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:18,045 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:18,045 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:18,047 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:18,059 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:18,060 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:18,062 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:18,063 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:18,064 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:18,065 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:18,065 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:18,066 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:30:18,134 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:30:18,134 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:30:18,135 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:30:18,136 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:30:18,136 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:30:18,137 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:30:18,138 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:30:18,139 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:30:18,139 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:30:18,140 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:30:18,175 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:30:18,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:30:18,509 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:30:18,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:30:18 WrapperNode [2021-11-12 22:30:18,511 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:30:18,512 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:30:18,513 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:30:18,513 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:30:18,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:30:18" (1/1) ... [2021-11-12 22:30:18,619 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:30:18" (1/1) ... [2021-11-12 22:30:18,673 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:30:18,674 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:30:18,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:30:18,674 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:30:18,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:30:18" (1/1) ... [2021-11-12 22:30:18,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:30:18" (1/1) ... [2021-11-12 22:30:18,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:30:18" (1/1) ... [2021-11-12 22:30:18,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:30:18" (1/1) ... [2021-11-12 22:30:18,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:30:18" (1/1) ... [2021-11-12 22:30:18,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:30:18" (1/1) ... [2021-11-12 22:30:18,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:30:18" (1/1) ... [2021-11-12 22:30:18,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:30:18,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:30:18,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:30:18,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:30:18,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:30:18" (1/1) ... [2021-11-12 22:30:18,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:30:18,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:30:18,769 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:30:18,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:30:18,824 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_init [2021-11-12 22:30:18,824 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_init [2021-11-12 22:30:18,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:30:18,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:30:18,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 22:30:18,825 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 22:30:18,825 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-12 22:30:18,826 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-12 22:30:18,826 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-12 22:30:18,826 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-12 22:30:18,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 22:30:18,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:30:18,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:30:18,827 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2021-11-12 22:30:18,827 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2021-11-12 22:30:18,827 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 22:30:18,828 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 22:30:18,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:30:18,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 22:30:18,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 22:30:19,471 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:30:19,472 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:30:19,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:30:19 BoogieIcfgContainer [2021-11-12 22:30:19,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:30:19,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:30:19,476 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:30:19,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:30:19,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:30:15" (1/3) ... [2021-11-12 22:30:19,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66841f90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:30:19, skipping insertion in model container [2021-11-12 22:30:19,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:30:18" (2/3) ... [2021-11-12 22:30:19,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66841f90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:30:19, skipping insertion in model container [2021-11-12 22:30:19,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:30:19" (3/3) ... [2021-11-12 22:30:19,483 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_init_harness.i [2021-11-12 22:30:19,489 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:30:19,489 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:30:19,541 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:30:19,548 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 22:30:19,548 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:30:19,565 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 44 states have internal predecessors, (58), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-12 22:30:19,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-12 22:30:19,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:19,572 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:19,573 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:19,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:19,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1017333715, now seen corresponding path program 1 times [2021-11-12 22:30:19,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:19,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989747397] [2021-11-12 22:30:19,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:19,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:19,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:19,597 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:19,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:30:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:19,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:30:19,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:19,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:20,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:20,002 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:20,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989747397] [2021-11-12 22:30:20,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989747397] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:20,003 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:30:20,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:30:20,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192042092] [2021-11-12 22:30:20,005 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:20,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:30:20,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:20,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:30:20,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:30:20,053 INFO L87 Difference]: Start difference. First operand has 61 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 44 states have internal predecessors, (58), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-12 22:30:20,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:20,096 INFO L93 Difference]: Finished difference Result 117 states and 158 transitions. [2021-11-12 22:30:20,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:30:20,099 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-11-12 22:30:20,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:20,111 INFO L225 Difference]: With dead ends: 117 [2021-11-12 22:30:20,112 INFO L226 Difference]: Without dead ends: 56 [2021-11-12 22:30:20,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 50 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 22:30:20,122 INFO L933 BasicCegarLoop]: 75 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, 75 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.62ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:20,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 3.62ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:30:20,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-12 22:30:20,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-11-12 22:30:20,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 40 states have internal predecessors, (51), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-12 22:30:20,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-11-12 22:30:20,177 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 26 [2021-11-12 22:30:20,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:20,178 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-11-12 22:30:20,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-12 22:30:20,179 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2021-11-12 22:30:20,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-12 22:30:20,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:20,181 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:20,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:20,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:20,398 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:20,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:20,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1834982165, now seen corresponding path program 1 times [2021-11-12 22:30:20,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:20,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1617000189] [2021-11-12 22:30:20,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:20,400 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:20,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:20,403 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:20,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:30:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:20,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 22:30:20,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:20,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:20,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:20,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:20,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:20,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:20,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:20,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-12 22:30:20,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:20,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:20,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:20,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:20,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:20,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:20,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-12 22:30:22,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:22,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:23,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:23,451 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:23,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1617000189] [2021-11-12 22:30:23,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1617000189] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:23,452 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:30:23,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 6] imperfect sequences [] total 14 [2021-11-12 22:30:23,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121664320] [2021-11-12 22:30:23,452 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:23,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 22:30:23,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:23,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 22:30:23,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:30:23,455 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 14 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-12 22:30:23,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:23,972 INFO L93 Difference]: Finished difference Result 124 states and 157 transitions. [2021-11-12 22:30:23,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 22:30:23,974 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2021-11-12 22:30:23,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:23,978 INFO L225 Difference]: With dead ends: 124 [2021-11-12 22:30:23,978 INFO L226 Difference]: Without dead ends: 73 [2021-11-12 22:30:23,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:30:23,980 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 24 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 266.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.02ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 322.64ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:23,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 612 Invalid, 94 Unknown, 0 Unchecked, 8.02ms Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 45 Unchecked, 322.64ms Time] [2021-11-12 22:30:23,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-12 22:30:23,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2021-11-12 22:30:23,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 53 states have internal predecessors, (68), 10 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2021-11-12 22:30:23,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2021-11-12 22:30:23,994 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 26 [2021-11-12 22:30:23,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:23,995 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2021-11-12 22:30:23,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-12 22:30:23,995 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2021-11-12 22:30:23,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-12 22:30:23,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:23,996 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:24,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:24,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:24,211 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:24,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:24,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1650638505, now seen corresponding path program 1 times [2021-11-12 22:30:24,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:24,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973891692] [2021-11-12 22:30:24,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:24,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:24,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:24,214 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:24,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:30:24,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:24,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:30:24,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:24,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:24,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:24,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:24,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:24,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:24,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:24,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-12 22:30:25,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:25,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:26,296 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 28 treesize of output 26 [2021-11-12 22:30:26,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:26,424 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:26,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973891692] [2021-11-12 22:30:26,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973891692] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:26,425 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:30:26,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 10] imperfect sequences [] total 19 [2021-11-12 22:30:26,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121324908] [2021-11-12 22:30:26,425 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:26,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-12 22:30:26,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:26,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-12 22:30:26,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:30:26,427 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand has 19 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-12 22:30:26,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:26,866 INFO L93 Difference]: Finished difference Result 168 states and 222 transitions. [2021-11-12 22:30:26,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 22:30:26,867 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2021-11-12 22:30:26,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:26,870 INFO L225 Difference]: With dead ends: 168 [2021-11-12 22:30:26,870 INFO L226 Difference]: Without dead ends: 111 [2021-11-12 22:30:26,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:30:26,872 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 169 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 247.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.22ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 280.03ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:26,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 791 Invalid, 149 Unknown, 0 Unchecked, 6.22ms Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 73 Unchecked, 280.03ms Time] [2021-11-12 22:30:26,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-12 22:30:26,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 89. [2021-11-12 22:30:26,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 69 states have (on average 1.3768115942028984) internal successors, (95), 71 states have internal predecessors, (95), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-12 22:30:26,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 118 transitions. [2021-11-12 22:30:26,888 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 118 transitions. Word has length 26 [2021-11-12 22:30:26,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:26,889 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 118 transitions. [2021-11-12 22:30:26,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-12 22:30:26,889 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 118 transitions. [2021-11-12 22:30:26,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-12 22:30:26,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:26,891 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:26,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:27,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:27,110 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:27,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:27,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1257611495, now seen corresponding path program 1 times [2021-11-12 22:30:27,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:27,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202026263] [2021-11-12 22:30:27,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:27,112 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:27,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:27,112 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:27,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:30:27,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:27,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:30:27,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:27,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:27,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:27,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:27,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:27,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:27,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:27,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-12 22:30:27,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:27,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:27,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:27,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:27,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:27,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:27,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-12 22:30:29,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:29,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:30,187 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 27 treesize of output 25 [2021-11-12 22:30:30,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-12 22:30:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:30,224 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:30,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202026263] [2021-11-12 22:30:30,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202026263] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:30,224 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:30:30,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 7] imperfect sequences [] total 16 [2021-11-12 22:30:30,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299859312] [2021-11-12 22:30:30,225 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:30,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 22:30:30,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:30,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 22:30:30,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:30:30,227 INFO L87 Difference]: Start difference. First operand 89 states and 118 transitions. Second operand has 16 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 6 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-12 22:30:30,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:30,934 INFO L93 Difference]: Finished difference Result 197 states and 269 transitions. [2021-11-12 22:30:30,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:30:30,936 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 6 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2021-11-12 22:30:30,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:30,938 INFO L225 Difference]: With dead ends: 197 [2021-11-12 22:30:30,938 INFO L226 Difference]: Without dead ends: 134 [2021-11-12 22:30:30,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:30:30,939 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 123 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 352.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.77ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 397.14ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:30,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 730 Invalid, 161 Unknown, 0 Unchecked, 5.77ms Time], IncrementalHoareTripleChecker [5 Valid, 83 Invalid, 0 Unknown, 73 Unchecked, 397.14ms Time] [2021-11-12 22:30:30,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-12 22:30:30,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 91. [2021-11-12 22:30:30,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.380281690140845) internal successors, (98), 73 states have internal predecessors, (98), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-12 22:30:30,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 121 transitions. [2021-11-12 22:30:30,954 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 121 transitions. Word has length 26 [2021-11-12 22:30:30,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:30,955 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 121 transitions. [2021-11-12 22:30:30,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 6 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-12 22:30:30,955 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 121 transitions. [2021-11-12 22:30:30,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-12 22:30:30,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:30,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:30,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:31,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:31,172 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:31,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:31,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1515776933, now seen corresponding path program 1 times [2021-11-12 22:30:31,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:31,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333233776] [2021-11-12 22:30:31,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:31,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:31,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:31,176 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:31,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:30:31,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:31,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:30:31,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:31,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:31,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:31,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:31,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:31,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:31,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:31,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-12 22:30:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:32,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:32,590 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 28 treesize of output 26 [2021-11-12 22:30:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:32,737 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:32,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333233776] [2021-11-12 22:30:32,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333233776] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:32,737 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:30:32,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 10] imperfect sequences [] total 19 [2021-11-12 22:30:32,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481908375] [2021-11-12 22:30:32,738 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:32,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-12 22:30:32,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:32,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-12 22:30:32,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:30:32,739 INFO L87 Difference]: Start difference. First operand 91 states and 121 transitions. Second operand has 19 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-12 22:30:33,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:33,201 INFO L93 Difference]: Finished difference Result 244 states and 338 transitions. [2021-11-12 22:30:33,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 22:30:33,202 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2021-11-12 22:30:33,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:33,203 INFO L225 Difference]: With dead ends: 244 [2021-11-12 22:30:33,203 INFO L226 Difference]: Without dead ends: 177 [2021-11-12 22:30:33,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:30:33,205 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 221 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 315.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.21ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 352.74ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:33,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 1046 Invalid, 244 Unknown, 0 Unchecked, 6.21ms Time], IncrementalHoareTripleChecker [4 Valid, 111 Invalid, 0 Unknown, 129 Unchecked, 352.74ms Time] [2021-11-12 22:30:33,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-12 22:30:33,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 104. [2021-11-12 22:30:33,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 84 states have (on average 1.3928571428571428) internal successors, (117), 86 states have internal predecessors, (117), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-12 22:30:33,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 140 transitions. [2021-11-12 22:30:33,250 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 140 transitions. Word has length 26 [2021-11-12 22:30:33,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:33,250 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 140 transitions. [2021-11-12 22:30:33,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-12 22:30:33,251 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 140 transitions. [2021-11-12 22:30:33,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-12 22:30:33,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:33,252 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:33,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:33,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:33,456 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:33,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:33,457 INFO L85 PathProgramCache]: Analyzing trace with hash 504659683, now seen corresponding path program 1 times [2021-11-12 22:30:33,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:33,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257401228] [2021-11-12 22:30:33,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:33,458 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:33,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:33,459 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:33,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:30:33,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:33,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:30:33,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:33,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:33,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:33,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:33,830 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:33,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257401228] [2021-11-12 22:30:33,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257401228] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:33,830 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:30:33,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-12 22:30:33,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696474077] [2021-11-12 22:30:33,831 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:33,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:30:33,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:33,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:30:33,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:30:33,832 INFO L87 Difference]: Start difference. First operand 104 states and 140 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:30:33,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:33,946 INFO L93 Difference]: Finished difference Result 206 states and 282 transitions. [2021-11-12 22:30:33,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:30:33,947 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-11-12 22:30:33,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:33,948 INFO L225 Difference]: With dead ends: 206 [2021-11-12 22:30:33,948 INFO L226 Difference]: Without dead ends: 87 [2021-11-12 22:30:33,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:30:33,950 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 31 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.72ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 91.27ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:33,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 444 Invalid, 41 Unknown, 0 Unchecked, 1.72ms Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 91.27ms Time] [2021-11-12 22:30:33,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-12 22:30:33,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-12 22:30:33,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 68 states have (on average 1.338235294117647) internal successors, (91), 69 states have internal predecessors, (91), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-12 22:30:33,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 113 transitions. [2021-11-12 22:30:33,961 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 113 transitions. Word has length 26 [2021-11-12 22:30:33,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:33,961 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 113 transitions. [2021-11-12 22:30:33,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:30:33,962 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 113 transitions. [2021-11-12 22:30:33,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-12 22:30:33,963 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:33,963 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:33,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:34,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:34,176 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:34,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:34,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1687611897, now seen corresponding path program 1 times [2021-11-12 22:30:34,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:34,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175023746] [2021-11-12 22:30:34,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:34,178 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:34,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:34,178 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:34,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:30:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:34,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:30:34,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:34,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:34,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:34,645 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:34,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175023746] [2021-11-12 22:30:34,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175023746] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:34,646 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:30:34,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-12 22:30:34,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619804000] [2021-11-12 22:30:34,646 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:34,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:30:34,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:34,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:30:34,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:30:34,648 INFO L87 Difference]: Start difference. First operand 87 states and 113 transitions. Second operand has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:30:34,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:34,907 INFO L93 Difference]: Finished difference Result 158 states and 204 transitions. [2021-11-12 22:30:34,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:30:34,908 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-11-12 22:30:34,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:34,909 INFO L225 Difference]: With dead ends: 158 [2021-11-12 22:30:34,909 INFO L226 Difference]: Without dead ends: 89 [2021-11-12 22:30:34,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:30:34,910 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 53 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 180.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.81ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 208.71ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:34,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 337 Invalid, 103 Unknown, 0 Unchecked, 1.81ms Time], IncrementalHoareTripleChecker [13 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 208.71ms Time] [2021-11-12 22:30:34,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-12 22:30:34,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2021-11-12 22:30:34,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 68 states have (on average 1.3088235294117647) internal successors, (89), 69 states have internal predecessors, (89), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-12 22:30:34,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2021-11-12 22:30:34,919 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 28 [2021-11-12 22:30:34,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:34,919 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2021-11-12 22:30:34,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:30:34,920 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2021-11-12 22:30:34,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-12 22:30:34,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:34,921 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:34,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-12 22:30:35,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:35,128 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:35,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:35,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1850407916, now seen corresponding path program 1 times [2021-11-12 22:30:35,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:35,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181397985] [2021-11-12 22:30:35,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:35,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:35,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:35,138 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:35,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:30:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:35,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:30:35,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:35,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:35,649 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:35,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181397985] [2021-11-12 22:30:35,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181397985] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:35,650 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:30:35,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 12 [2021-11-12 22:30:35,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788339957] [2021-11-12 22:30:35,650 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:35,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:30:35,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:35,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:30:35,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:30:35,652 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:30:36,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:36,042 INFO L93 Difference]: Finished difference Result 176 states and 227 transitions. [2021-11-12 22:30:36,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:30:36,043 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-11-12 22:30:36,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:36,044 INFO L225 Difference]: With dead ends: 176 [2021-11-12 22:30:36,045 INFO L226 Difference]: Without dead ends: 105 [2021-11-12 22:30:36,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 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 22:30:36,046 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 88 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 263.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.98ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 306.36ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:36,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 460 Invalid, 170 Unknown, 0 Unchecked, 2.98ms Time], IncrementalHoareTripleChecker [23 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 306.36ms Time] [2021-11-12 22:30:36,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-12 22:30:36,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2021-11-12 22:30:36,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 70 states have (on average 1.3) internal successors, (91), 71 states have internal predecessors, (91), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-12 22:30:36,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 113 transitions. [2021-11-12 22:30:36,056 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 113 transitions. Word has length 30 [2021-11-12 22:30:36,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:36,057 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 113 transitions. [2021-11-12 22:30:36,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:30:36,057 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 113 transitions. [2021-11-12 22:30:36,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-12 22:30:36,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:36,059 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:36,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-12 22:30:36,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:36,273 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:36,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:36,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1395309347, now seen corresponding path program 1 times [2021-11-12 22:30:36,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:36,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1306479413] [2021-11-12 22:30:36,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:36,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:36,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:36,275 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:36,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:30:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:36,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:30:36,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:36,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:36,621 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:36,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1306479413] [2021-11-12 22:30:36,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1306479413] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:36,621 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:30:36,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 3] imperfect sequences [] total 9 [2021-11-12 22:30:36,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967425968] [2021-11-12 22:30:36,621 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:36,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:30:36,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:36,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:30:36,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:30:36,623 INFO L87 Difference]: Start difference. First operand 89 states and 113 transitions. Second operand has 9 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 22:30:36,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:36,984 INFO L93 Difference]: Finished difference Result 168 states and 219 transitions. [2021-11-12 22:30:36,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:30:36,985 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2021-11-12 22:30:36,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:36,986 INFO L225 Difference]: With dead ends: 168 [2021-11-12 22:30:36,986 INFO L226 Difference]: Without dead ends: 103 [2021-11-12 22:30:36,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 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 22:30:36,987 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 48 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 250.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.76ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 300.89ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:36,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 333 Invalid, 111 Unknown, 0 Unchecked, 1.76ms Time], IncrementalHoareTripleChecker [18 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 300.89ms Time] [2021-11-12 22:30:36,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-12 22:30:36,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 83. [2021-11-12 22:30:36,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 64 states have (on average 1.296875) internal successors, (83), 65 states have internal predecessors, (83), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-12 22:30:36,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2021-11-12 22:30:36,996 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 31 [2021-11-12 22:30:36,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:36,996 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2021-11-12 22:30:36,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 22:30:36,996 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2021-11-12 22:30:36,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-12 22:30:36,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:36,997 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:37,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:37,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:37,198 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:37,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:37,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1854431003, now seen corresponding path program 1 times [2021-11-12 22:30:37,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:37,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [278975490] [2021-11-12 22:30:37,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:37,199 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:37,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:37,201 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:37,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:30:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:37,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-12 22:30:37,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:37,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:37,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:37,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:37,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:37,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:37,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:37,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-12 22:30:37,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:37,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:37,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:37,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:37,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:37,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:37,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-12 22:30:40,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:40,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:49,768 INFO L354 Elim1Store]: treesize reduction 29, result has 3.3 percent of original size [2021-11-12 22:30:49,769 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 7762 treesize of output 1 [2021-11-12 22:30:49,779 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-12 22:30:49,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 14792 treesize of output 1 [2021-11-12 22:30:49,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:49,794 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:49,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [278975490] [2021-11-12 22:30:49,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [278975490] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:49,794 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:30:49,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15, 11] imperfect sequences [] total 24 [2021-11-12 22:30:49,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731983745] [2021-11-12 22:30:49,795 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:49,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-12 22:30:49,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:49,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-12 22:30:49,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-11-12 22:30:49,797 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 24 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 8 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-12 22:30:50,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:50,751 INFO L93 Difference]: Finished difference Result 183 states and 232 transitions. [2021-11-12 22:30:50,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-12 22:30:50,753 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 8 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2021-11-12 22:30:50,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:50,754 INFO L225 Difference]: With dead ends: 183 [2021-11-12 22:30:50,754 INFO L226 Difference]: Without dead ends: 113 [2021-11-12 22:30:50,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-11-12 22:30:50,756 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 52 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 592.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.64ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 676.48ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:50,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 841 Invalid, 331 Unknown, 0 Unchecked, 5.64ms Time], IncrementalHoareTripleChecker [13 Valid, 113 Invalid, 0 Unknown, 205 Unchecked, 676.48ms Time] [2021-11-12 22:30:50,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-12 22:30:50,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 103. [2021-11-12 22:30:50,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 79 states have (on average 1.2784810126582278) internal successors, (101), 82 states have internal predecessors, (101), 13 states have call successors, (13), 8 states have call predecessors, (13), 10 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-12 22:30:50,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 131 transitions. [2021-11-12 22:30:50,770 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 131 transitions. Word has length 39 [2021-11-12 22:30:50,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:50,770 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 131 transitions. [2021-11-12 22:30:50,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 8 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-12 22:30:50,770 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 131 transitions. [2021-11-12 22:30:50,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-12 22:30:50,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:50,772 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:50,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:50,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:50,988 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:50,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:50,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1596265565, now seen corresponding path program 1 times [2021-11-12 22:30:50,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:50,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462252191] [2021-11-12 22:30:50,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:50,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:50,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:50,990 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:50,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:30:51,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:51,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-12 22:30:51,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:52,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:52,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:52,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:52,941 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:52,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462252191] [2021-11-12 22:30:52,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462252191] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:52,941 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:30:52,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 11] imperfect sequences [] total 18 [2021-11-12 22:30:52,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253557865] [2021-11-12 22:30:52,942 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:52,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 22:30:52,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:52,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 22:30:52,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:30:52,943 INFO L87 Difference]: Start difference. First operand 103 states and 131 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 3 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 22:30:53,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:53,843 INFO L93 Difference]: Finished difference Result 242 states and 321 transitions. [2021-11-12 22:30:53,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 22:30:53,847 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 3 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2021-11-12 22:30:53,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:53,848 INFO L225 Difference]: With dead ends: 242 [2021-11-12 22:30:53,849 INFO L226 Difference]: Without dead ends: 164 [2021-11-12 22:30:53,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-11-12 22:30:53,850 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 111 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 422.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.71ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 474.98ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:53,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 490 Invalid, 225 Unknown, 0 Unchecked, 2.71ms Time], IncrementalHoareTripleChecker [10 Valid, 163 Invalid, 0 Unknown, 52 Unchecked, 474.98ms Time] [2021-11-12 22:30:53,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-12 22:30:53,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 144. [2021-11-12 22:30:53,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 114 states have (on average 1.280701754385965) internal successors, (146), 119 states have internal predecessors, (146), 16 states have call successors, (16), 10 states have call predecessors, (16), 13 states have return successors, (24), 14 states have call predecessors, (24), 15 states have call successors, (24) [2021-11-12 22:30:53,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 186 transitions. [2021-11-12 22:30:53,869 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 186 transitions. Word has length 39 [2021-11-12 22:30:53,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:53,870 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 186 transitions. [2021-11-12 22:30:53,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 3 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 22:30:53,870 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 186 transitions. [2021-11-12 22:30:53,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-12 22:30:53,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:53,872 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:53,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:54,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:54,092 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:54,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:54,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1687584481, now seen corresponding path program 1 times [2021-11-12 22:30:54,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:54,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1630309884] [2021-11-12 22:30:54,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:54,094 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:54,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:54,095 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:54,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:30:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:54,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:30:54,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:54,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:54,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:54,812 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:54,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1630309884] [2021-11-12 22:30:54,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1630309884] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:54,813 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:30:54,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 14 [2021-11-12 22:30:54,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683876704] [2021-11-12 22:30:54,813 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:54,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 22:30:54,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:54,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 22:30:54,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:30:54,814 INFO L87 Difference]: Start difference. First operand 144 states and 186 transitions. Second operand has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-12 22:30:55,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:55,280 INFO L93 Difference]: Finished difference Result 302 states and 412 transitions. [2021-11-12 22:30:55,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 22:30:55,281 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 39 [2021-11-12 22:30:55,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:55,282 INFO L225 Difference]: With dead ends: 302 [2021-11-12 22:30:55,282 INFO L226 Difference]: Without dead ends: 159 [2021-11-12 22:30:55,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:30:55,284 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 104 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 311.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.73ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 371.23ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:55,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 522 Invalid, 243 Unknown, 0 Unchecked, 2.73ms Time], IncrementalHoareTripleChecker [33 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 371.23ms Time] [2021-11-12 22:30:55,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-12 22:30:55,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 140. [2021-11-12 22:30:55,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.2545454545454546) internal successors, (138), 115 states have internal predecessors, (138), 17 states have call successors, (17), 10 states have call predecessors, (17), 12 states have return successors, (26), 14 states have call predecessors, (26), 16 states have call successors, (26) [2021-11-12 22:30:55,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 181 transitions. [2021-11-12 22:30:55,303 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 181 transitions. Word has length 39 [2021-11-12 22:30:55,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:55,304 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 181 transitions. [2021-11-12 22:30:55,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-12 22:30:55,304 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 181 transitions. [2021-11-12 22:30:55,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-12 22:30:55,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:55,306 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:55,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:55,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:55,516 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:55,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:55,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1455716955, now seen corresponding path program 1 times [2021-11-12 22:30:55,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:55,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1353181733] [2021-11-12 22:30:55,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:55,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:55,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:55,520 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:55,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:30:55,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:55,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:30:55,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:55,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:55,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:55,779 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:55,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1353181733] [2021-11-12 22:30:55,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1353181733] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:55,780 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:30:55,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-12 22:30:55,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790270822] [2021-11-12 22:30:55,780 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:55,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:30:55,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:55,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:30:55,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:30:55,781 INFO L87 Difference]: Start difference. First operand 140 states and 181 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 22:30:55,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:55,819 INFO L93 Difference]: Finished difference Result 260 states and 340 transitions. [2021-11-12 22:30:55,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:30:55,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2021-11-12 22:30:55,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:55,821 INFO L225 Difference]: With dead ends: 260 [2021-11-12 22:30:55,821 INFO L226 Difference]: Without dead ends: 147 [2021-11-12 22:30:55,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:30:55,823 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 8 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.51ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.03ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:55,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 202 Invalid, 24 Unknown, 0 Unchecked, 0.51ms Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 23.03ms Time] [2021-11-12 22:30:55,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-12 22:30:55,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 140. [2021-11-12 22:30:55,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.2363636363636363) internal successors, (136), 115 states have internal predecessors, (136), 17 states have call successors, (17), 10 states have call predecessors, (17), 12 states have return successors, (26), 14 states have call predecessors, (26), 16 states have call successors, (26) [2021-11-12 22:30:55,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 179 transitions. [2021-11-12 22:30:55,840 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 179 transitions. Word has length 39 [2021-11-12 22:30:55,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:55,840 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 179 transitions. [2021-11-12 22:30:55,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 22:30:55,841 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 179 transitions. [2021-11-12 22:30:55,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-12 22:30:55,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:55,842 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:55,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:56,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:56,048 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:56,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:56,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1033812007, now seen corresponding path program 1 times [2021-11-12 22:30:56,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:56,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059058093] [2021-11-12 22:30:56,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:56,049 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:56,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:56,060 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:56,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:30:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:56,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:30:56,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:56,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:56,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:56,330 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:56,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059058093] [2021-11-12 22:30:56,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059058093] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:56,331 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:30:56,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-12 22:30:56,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816608672] [2021-11-12 22:30:56,331 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:56,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:30:56,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:56,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:30:56,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:30:56,336 INFO L87 Difference]: Start difference. First operand 140 states and 179 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 22:30:56,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:56,386 INFO L93 Difference]: Finished difference Result 235 states and 296 transitions. [2021-11-12 22:30:56,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:30:56,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2021-11-12 22:30:56,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:56,393 INFO L225 Difference]: With dead ends: 235 [2021-11-12 22:30:56,394 INFO L226 Difference]: Without dead ends: 105 [2021-11-12 22:30:56,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:30:56,395 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 6 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.49ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.78ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:56,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 255 Invalid, 39 Unknown, 0 Unchecked, 0.49ms Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 27.78ms Time] [2021-11-12 22:30:56,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-12 22:30:56,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 98. [2021-11-12 22:30:56,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 77 states have internal predecessors, (88), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-12 22:30:56,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 113 transitions. [2021-11-12 22:30:56,409 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 113 transitions. Word has length 39 [2021-11-12 22:30:56,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:56,410 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 113 transitions. [2021-11-12 22:30:56,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 22:30:56,410 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 113 transitions. [2021-11-12 22:30:56,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-12 22:30:56,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:56,411 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:56,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:56,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:56,618 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:56,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:56,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1045188466, now seen corresponding path program 1 times [2021-11-12 22:30:56,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:56,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060090082] [2021-11-12 22:30:56,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:56,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:56,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:56,621 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:56,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:30:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:56,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:30:56,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:57,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:57,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:57,680 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:57,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060090082] [2021-11-12 22:30:57,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060090082] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:30:57,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1192291367] [2021-11-12 22:30:57,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:57,681 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:30:57,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:30:57,682 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:30:57,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 22:30:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:57,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-12 22:30:57,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:58,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:58,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:58,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:58,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:58,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:58,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:58,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-12 22:30:58,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:58,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:58,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:58,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:58,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:58,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:58,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-12 22:31:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:01,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:01,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1192291367] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:01,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735462679] [2021-11-12 22:31:01,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:01,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:31:01,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:31:01,289 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:31:01,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-12 22:31:01,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:01,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 22:31:01,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:01,604 INFO L354 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2021-11-12 22:31:01,604 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 3 case distinctions, treesize of input 55 treesize of output 63 [2021-11-12 22:31:01,741 INFO L354 Elim1Store]: treesize reduction 157, result has 15.1 percent of original size [2021-11-12 22:31:01,741 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 3 case distinctions, treesize of input 63 treesize of output 71 [2021-11-12 22:31:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:10,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:10,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735462679] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:10,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:31:10,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 14, 8, 11, 8] total 33 [2021-11-12 22:31:10,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948717023] [2021-11-12 22:31:10,572 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:31:10,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-12 22:31:10,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:31:10,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-12 22:31:10,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=899, Unknown=3, NotChecked=0, Total=1056 [2021-11-12 22:31:10,574 INFO L87 Difference]: Start difference. First operand 98 states and 113 transitions. Second operand has 33 states, 30 states have (on average 2.933333333333333) internal successors, (88), 32 states have internal predecessors, (88), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-12 22:31:10,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:31:10,985 INFO L93 Difference]: Finished difference Result 180 states and 211 transitions. [2021-11-12 22:31:10,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-12 22:31:10,985 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.933333333333333) internal successors, (88), 32 states have internal predecessors, (88), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) Word has length 41 [2021-11-12 22:31:10,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:31:10,986 INFO L225 Difference]: With dead ends: 180 [2021-11-12 22:31:10,987 INFO L226 Difference]: Without dead ends: 110 [2021-11-12 22:31:10,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=177, Invalid=1080, Unknown=3, NotChecked=0, Total=1260 [2021-11-12 22:31:10,989 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 44 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 110.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.77ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 123.86ms IncrementalHoareTripleChecker+Time [2021-11-12 22:31:10,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 552 Invalid, 98 Unknown, 0 Unchecked, 1.77ms Time], IncrementalHoareTripleChecker [9 Valid, 27 Invalid, 0 Unknown, 62 Unchecked, 123.86ms Time] [2021-11-12 22:31:10,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-12 22:31:10,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 97. [2021-11-12 22:31:10,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 76 states have internal predecessors, (86), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-12 22:31:11,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2021-11-12 22:31:11,000 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 41 [2021-11-12 22:31:11,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:31:11,001 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2021-11-12 22:31:11,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.933333333333333) internal successors, (88), 32 states have internal predecessors, (88), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-12 22:31:11,001 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2021-11-12 22:31:11,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-12 22:31:11,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:31:11,002 INFO L514 BasicCegarLoop]: trace histogram [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 22:31:11,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:11,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:11,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:11,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:31:11,610 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:31:11,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:31:11,610 INFO L85 PathProgramCache]: Analyzing trace with hash 964483973, now seen corresponding path program 1 times [2021-11-12 22:31:11,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:31:11,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268641833] [2021-11-12 22:31:11,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:11,611 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:31:11,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:31:11,611 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:31:11,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:31:11,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:11,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:31:11,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:31:11,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:12,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:31:12,070 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:31:12,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268641833] [2021-11-12 22:31:12,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268641833] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:31:12,071 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:31:12,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2021-11-12 22:31:12,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519987048] [2021-11-12 22:31:12,071 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:31:12,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 22:31:12,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:31:12,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 22:31:12,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:31:12,072 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand has 14 states, 12 states have (on average 3.25) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:31:12,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:31:12,166 INFO L93 Difference]: Finished difference Result 109 states and 123 transitions. [2021-11-12 22:31:12,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:31:12,167 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.25) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2021-11-12 22:31:12,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:31:12,168 INFO L225 Difference]: With dead ends: 109 [2021-11-12 22:31:12,168 INFO L226 Difference]: Without dead ends: 107 [2021-11-12 22:31:12,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:31:12,169 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 16 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.41ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.98ms IncrementalHoareTripleChecker+Time [2021-11-12 22:31:12,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 636 Invalid, 62 Unknown, 0 Unchecked, 1.41ms Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 48.98ms Time] [2021-11-12 22:31:12,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-12 22:31:12,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2021-11-12 22:31:12,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 83 states have internal predecessors, (92), 13 states have call successors, (13), 10 states have call predecessors, (13), 11 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2021-11-12 22:31:12,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 120 transitions. [2021-11-12 22:31:12,185 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 120 transitions. Word has length 42 [2021-11-12 22:31:12,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:31:12,186 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 120 transitions. [2021-11-12 22:31:12,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.25) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:31:12,187 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 120 transitions. [2021-11-12 22:31:12,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-12 22:31:12,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:31:12,188 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:31:12,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:12,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:31:12,396 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:31:12,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:31:12,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1440497479, now seen corresponding path program 1 times [2021-11-12 22:31:12,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:31:12,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1525623929] [2021-11-12 22:31:12,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:12,397 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:31:12,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:31:12,398 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:31:12,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:31:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:12,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:31:12,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:12,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:12,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:12,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:12,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:12,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:12,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:12,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-12 22:31:12,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:12,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:12,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:12,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:12,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:12,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:12,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-12 22:31:14,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:31:14,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:16,464 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 25 treesize of output 23 [2021-11-12 22:31:16,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-12 22:31:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:31:16,489 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:31:16,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1525623929] [2021-11-12 22:31:16,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1525623929] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:16,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [236711215] [2021-11-12 22:31:16,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:16,490 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:31:16,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:31:16,494 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:31:16,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-12 22:31:16,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:16,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-12 22:31:16,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:16,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:16,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:16,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:16,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:16,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:16,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:16,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-12 22:31:17,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:17,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:17,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:17,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:17,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:17,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:17,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-12 22:31:18,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:31:18,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:19,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-12 22:31:19,934 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 25 treesize of output 23 [2021-11-12 22:31:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:31:19,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [236711215] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:19,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412137371] [2021-11-12 22:31:19,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:19,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:31:19,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:31:19,960 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:31:19,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-12 22:31:20,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:20,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 22:31:20,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:20,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:20,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:20,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:20,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:20,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:20,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:20,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-12 22:31:20,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:20,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:20,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:20,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:20,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:20,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:20,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-12 22:31:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:31:21,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:22,610 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 25 treesize of output 23 [2021-11-12 22:31:22,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-12 22:31:22,631 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:31:22,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412137371] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:22,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:31:22,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 13, 8, 12, 8] total 19 [2021-11-12 22:31:22,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819573115] [2021-11-12 22:31:22,632 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:31:22,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-12 22:31:22,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:31:22,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-12 22:31:22,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:31:22,634 INFO L87 Difference]: Start difference. First operand 106 states and 120 transitions. Second operand has 19 states, 15 states have (on average 4.133333333333334) internal successors, (62), 18 states have internal predecessors, (62), 11 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-12 22:31:23,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:31:23,381 INFO L93 Difference]: Finished difference Result 198 states and 228 transitions. [2021-11-12 22:31:23,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 22:31:23,383 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 4.133333333333334) internal successors, (62), 18 states have internal predecessors, (62), 11 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) Word has length 50 [2021-11-12 22:31:23,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:31:23,383 INFO L225 Difference]: With dead ends: 198 [2021-11-12 22:31:23,383 INFO L226 Difference]: Without dead ends: 122 [2021-11-12 22:31:23,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 273 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:31:23,384 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 51 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 502.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.22ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 589.42ms IncrementalHoareTripleChecker+Time [2021-11-12 22:31:23,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 575 Invalid, 208 Unknown, 0 Unchecked, 2.22ms Time], IncrementalHoareTripleChecker [11 Valid, 117 Invalid, 0 Unknown, 80 Unchecked, 589.42ms Time] [2021-11-12 22:31:23,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-12 22:31:23,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 117. [2021-11-12 22:31:23,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 90 states have (on average 1.1555555555555554) internal successors, (104), 92 states have internal predecessors, (104), 14 states have call successors, (14), 11 states have call predecessors, (14), 12 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2021-11-12 22:31:23,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 134 transitions. [2021-11-12 22:31:23,398 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 134 transitions. Word has length 50 [2021-11-12 22:31:23,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:31:23,398 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 134 transitions. [2021-11-12 22:31:23,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 4.133333333333334) internal successors, (62), 18 states have internal predecessors, (62), 11 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-12 22:31:23,399 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 134 transitions. [2021-11-12 22:31:23,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-12 22:31:23,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:31:23,400 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:31:23,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-12 22:31:23,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:23,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:24,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:31:24,016 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:31:24,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:31:24,017 INFO L85 PathProgramCache]: Analyzing trace with hash 2080562516, now seen corresponding path program 2 times [2021-11-12 22:31:24,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:31:24,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014477497] [2021-11-12 22:31:24,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:31:24,017 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:31:24,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:31:24,018 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:31:24,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:31:24,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:31:24,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:31:24,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:31:24,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:31:24,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:25,086 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-12 22:31:25,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-12 22:31:25,097 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-12 22:31:25,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-11-12 22:31:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:31:25,146 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:31:25,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014477497] [2021-11-12 22:31:25,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014477497] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:31:25,146 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:31:25,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 11 [2021-11-12 22:31:25,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744311259] [2021-11-12 22:31:25,147 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:31:25,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:31:25,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:31:25,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:31:25,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:31:25,148 INFO L87 Difference]: Start difference. First operand 117 states and 134 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:31:25,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:31:25,695 INFO L93 Difference]: Finished difference Result 212 states and 246 transitions. [2021-11-12 22:31:25,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 22:31:25,696 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2021-11-12 22:31:25,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:31:25,697 INFO L225 Difference]: With dead ends: 212 [2021-11-12 22:31:25,697 INFO L226 Difference]: Without dead ends: 139 [2021-11-12 22:31:25,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:31:25,699 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 34 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 175.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.31ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 206.31ms IncrementalHoareTripleChecker+Time [2021-11-12 22:31:25,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 333 Invalid, 111 Unknown, 0 Unchecked, 1.31ms Time], IncrementalHoareTripleChecker [14 Valid, 89 Invalid, 0 Unknown, 8 Unchecked, 206.31ms Time] [2021-11-12 22:31:25,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-12 22:31:25,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 124. [2021-11-12 22:31:25,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 98 states have internal predecessors, (109), 14 states have call successors, (14), 11 states have call predecessors, (14), 14 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2021-11-12 22:31:25,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 141 transitions. [2021-11-12 22:31:25,713 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 141 transitions. Word has length 52 [2021-11-12 22:31:25,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:31:25,714 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 141 transitions. [2021-11-12 22:31:25,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:31:25,714 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 141 transitions. [2021-11-12 22:31:25,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-12 22:31:25,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:31:25,715 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:31:25,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:25,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:31:25,928 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:31:25,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:31:25,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1069445266, now seen corresponding path program 1 times [2021-11-12 22:31:25,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:31:25,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1679081525] [2021-11-12 22:31:25,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:25,929 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:31:25,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:31:25,931 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:31:25,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:31:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:26,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:31:26,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:31:26,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:26,275 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:31:26,275 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:31:26,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1679081525] [2021-11-12 22:31:26,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1679081525] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:31:26,275 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:31:26,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-12 22:31:26,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720065703] [2021-11-12 22:31:26,276 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:31:26,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:31:26,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:31:26,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:31:26,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:31:26,277 INFO L87 Difference]: Start difference. First operand 124 states and 141 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:31:26,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:31:26,306 INFO L93 Difference]: Finished difference Result 199 states and 229 transitions. [2021-11-12 22:31:26,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:31:26,307 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2021-11-12 22:31:26,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:31:26,308 INFO L225 Difference]: With dead ends: 199 [2021-11-12 22:31:26,308 INFO L226 Difference]: Without dead ends: 114 [2021-11-12 22:31:26,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:31:26,310 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 0 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.57ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.70ms IncrementalHoareTripleChecker+Time [2021-11-12 22:31:26,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 266 Invalid, 14 Unknown, 0 Unchecked, 0.57ms Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 17.70ms Time] [2021-11-12 22:31:26,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-12 22:31:26,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-11-12 22:31:26,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 88 states have (on average 1.125) internal successors, (99), 90 states have internal predecessors, (99), 13 states have call successors, (13), 11 states have call predecessors, (13), 12 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-12 22:31:26,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2021-11-12 22:31:26,323 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 52 [2021-11-12 22:31:26,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:31:26,324 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2021-11-12 22:31:26,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:31:26,324 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2021-11-12 22:31:26,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-12 22:31:26,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:31:26,325 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:31:26,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:26,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:31:26,542 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:31:26,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:31:26,542 INFO L85 PathProgramCache]: Analyzing trace with hash -41969126, now seen corresponding path program 1 times [2021-11-12 22:31:26,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:31:26,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537870777] [2021-11-12 22:31:26,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:26,543 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:31:26,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:31:26,544 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:31:26,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:31:26,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:26,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-12 22:31:26,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:27,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:27,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:29,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:31:29,199 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 39 [2021-11-12 22:31:29,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:31:29,218 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 35 treesize of output 38 [2021-11-12 22:31:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:31:29,525 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:31:29,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537870777] [2021-11-12 22:31:29,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [537870777] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:29,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [534265192] [2021-11-12 22:31:29,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:29,525 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:31:29,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:31:29,528 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:31:29,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-12 22:31:30,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:30,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-12 22:31:30,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:30,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:30,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:30,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:30,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:30,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:30,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:30,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-12 22:31:30,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:30,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:30,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:30,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:30,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:30,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:30,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-12 22:31:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:35,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:36,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:31:36,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [534265192] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:36,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372842247] [2021-11-12 22:31:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:36,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:31:36,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:31:36,783 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:31:36,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-12 22:31:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:36,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-12 22:31:36,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:36,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:36,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:36,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:36,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:36,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:36,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:36,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-12 22:31:36,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:36,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:36,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:36,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:36,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:36,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:36,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-12 22:31:41,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:41,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:54,233 WARN L227 SmtUtils]: Spent 10.06s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:32:04,718 WARN L227 SmtUtils]: Spent 10.05s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:32:06,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:32:06,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372842247] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:32:06,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:32:06,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 17, 13, 22, 18] total 48 [2021-11-12 22:32:06,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447616418] [2021-11-12 22:32:06,218 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:32:06,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-12 22:32:06,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:32:06,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-12 22:32:06,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2033, Unknown=1, NotChecked=0, Total=2256 [2021-11-12 22:32:06,221 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand has 48 states, 43 states have (on average 2.813953488372093) internal successors, (121), 41 states have internal predecessors, (121), 16 states have call successors, (23), 6 states have call predecessors, (23), 12 states have return successors, (21), 15 states have call predecessors, (21), 13 states have call successors, (21) [2021-11-12 22:32:29,542 WARN L227 SmtUtils]: Spent 20.11s on a formula simplification. DAG size of input: 25 DAG size of output: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:32:30,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:32:30,165 INFO L93 Difference]: Finished difference Result 149 states and 164 transitions. [2021-11-12 22:32:30,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-12 22:32:30,166 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 2.813953488372093) internal successors, (121), 41 states have internal predecessors, (121), 16 states have call successors, (23), 6 states have call predecessors, (23), 12 states have return successors, (21), 15 states have call predecessors, (21), 13 states have call successors, (21) Word has length 58 [2021-11-12 22:32:30,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:32:30,167 INFO L225 Difference]: With dead ends: 149 [2021-11-12 22:32:30,167 INFO L226 Difference]: Without dead ends: 147 [2021-11-12 22:32:30,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 286 SyntacticMatches, 11 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 53.7s TimeCoverageRelationStatistics Valid=279, Invalid=2689, Unknown=2, NotChecked=0, Total=2970 [2021-11-12 22:32:30,169 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 43 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 759.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1322 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.73ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 870.82ms IncrementalHoareTripleChecker+Time [2021-11-12 22:32:30,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 1322 Invalid, 363 Unknown, 0 Unchecked, 4.73ms Time], IncrementalHoareTripleChecker [11 Valid, 179 Invalid, 0 Unknown, 173 Unchecked, 870.82ms Time] [2021-11-12 22:32:30,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-12 22:32:30,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 141. [2021-11-12 22:32:30,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 107 states have (on average 1.1214953271028036) internal successors, (120), 108 states have internal predecessors, (120), 17 states have call successors, (17), 15 states have call predecessors, (17), 16 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) [2021-11-12 22:32:30,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 156 transitions. [2021-11-12 22:32:30,185 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 156 transitions. Word has length 58 [2021-11-12 22:32:30,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:32:30,185 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 156 transitions. [2021-11-12 22:32:30,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 2.813953488372093) internal successors, (121), 41 states have internal predecessors, (121), 16 states have call successors, (23), 6 states have call predecessors, (23), 12 states have return successors, (21), 15 states have call predecessors, (21), 13 states have call successors, (21) [2021-11-12 22:32:30,186 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 156 transitions. [2021-11-12 22:32:30,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-12 22:32:30,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:32:30,187 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-12 22:32:30,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:32:30,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:32:30,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-12 22:32:30,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:32:30,804 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:32:30,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:32:30,804 INFO L85 PathProgramCache]: Analyzing trace with hash 81677432, now seen corresponding path program 2 times [2021-11-12 22:32:30,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:32:30,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1073272918] [2021-11-12 22:32:30,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:32:30,805 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:32:30,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:32:30,806 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:32:30,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 22:32:31,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:32:31,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:32:31,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:32:31,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:32:31,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:31,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:31,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:31,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:31,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:31,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:31,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-12 22:32:31,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:31,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:31,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:31,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:31,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:31,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:31,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-12 22:32:33,837 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:32:33,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:32:35,643 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 25 treesize of output 23 [2021-11-12 22:32:35,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-12 22:32:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:32:35,678 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:32:35,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1073272918] [2021-11-12 22:32:35,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1073272918] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:32:35,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1505396128] [2021-11-12 22:32:35,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:32:35,679 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:32:35,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:32:35,680 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:32:35,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-12 22:32:36,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:32:36,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:32:36,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-12 22:32:36,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:32:36,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:36,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:36,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:36,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:36,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:36,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:36,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-12 22:32:36,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:36,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:36,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:36,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:36,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:36,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:36,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-12 22:32:39,093 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:32:39,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:32:41,532 INFO L354 Elim1Store]: treesize reduction 26, result has 13.3 percent of original size [2021-11-12 22:32:41,533 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 3806 treesize of output 3635 [2021-11-12 22:32:41,573 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 344 treesize of output 332 [2021-11-12 22:32:41,628 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 739 treesize of output 715 [2021-11-12 22:32:41,702 INFO L354 Elim1Store]: treesize reduction 25, result has 13.8 percent of original size [2021-11-12 22:32:41,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1824 treesize of output 1792 [2021-11-12 22:32:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:32:42,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1505396128] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:32:42,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154607842] [2021-11-12 22:32:42,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:32:42,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:32:42,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:32:42,153 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:32:42,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-12 22:32:42,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:32:42,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:32:42,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-12 22:32:42,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:32:42,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:42,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:42,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:42,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:42,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:42,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:42,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-12 22:32:42,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:42,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:42,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:42,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:42,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:42,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:42,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-12 22:32:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:32:47,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:33:14,103 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-12 22:33:14,104 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-11-12 22:33:14,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-12 22:33:14,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 13, 12] total 32 [2021-11-12 22:33:14,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282286832] [2021-11-12 22:33:14,105 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-12 22:33:14,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-12 22:33:14,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:33:14,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-12 22:33:14,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1887, Unknown=3, NotChecked=0, Total=2070 [2021-11-12 22:33:14,107 INFO L87 Difference]: Start difference. First operand 141 states and 156 transitions. Second operand has 32 states, 27 states have (on average 4.37037037037037) internal successors, (118), 30 states have internal predecessors, (118), 17 states have call successors, (24), 5 states have call predecessors, (24), 7 states have return successors, (21), 12 states have call predecessors, (21), 15 states have call successors, (21) [2021-11-12 22:33:14,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 325 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=180, Invalid=1887, Unknown=3, NotChecked=0, Total=2070 [2021-11-12 22:33:14,110 INFO L933 BasicCegarLoop]: 1 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, 1 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.01ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.01ms IncrementalHoareTripleChecker+Time [2021-11-12 22:33:14,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 2 Unknown, 0 Unchecked, 0.01ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 1 Unchecked, 0.01ms Time] [2021-11-12 22:33:14,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-12 22:33:14,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-12 22:33:14,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-12 22:33:14,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 22:33:14,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:33:14,712 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:312) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertCodeBlock(IncrementalHoareTripleChecker.java:435) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:278) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:284) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.releaseLock(ChainingHoareTripleChecker.java:425) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.releaseLock(ChainingHoareTripleChecker.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:199) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:885) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Broken pipe at java.base/java.io.FileOutputStream.writeBytes(Native Method) at java.base/java.io.FileOutputStream.write(FileOutputStream.java:354) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 37 more [2021-11-12 22:33:14,715 INFO L158 Benchmark]: Toolchain (without parser) took 178941.51ms. Allocated memory was 62.9MB in the beginning and 151.0MB in the end (delta: 88.1MB). Free memory was 35.2MB in the beginning and 29.3MB in the end (delta: 5.9MB). Peak memory consumption was 94.0MB. Max. memory is 16.1GB. [2021-11-12 22:33:14,715 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 62.9MB. Free memory is still 42.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:33:14,716 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2735.38ms. Allocated memory was 62.9MB in the beginning and 104.9MB in the end (delta: 41.9MB). Free memory was 34.9MB in the beginning and 65.9MB in the end (delta: -31.0MB). Peak memory consumption was 48.5MB. Max. memory is 16.1GB. [2021-11-12 22:33:14,716 INFO L158 Benchmark]: Boogie Procedure Inliner took 161.01ms. Allocated memory is still 104.9MB. Free memory was 65.9MB in the beginning and 60.3MB in the end (delta: 5.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-12 22:33:14,717 INFO L158 Benchmark]: Boogie Preprocessor took 58.82ms. Allocated memory is still 104.9MB. Free memory was 60.3MB in the beginning and 56.9MB in the end (delta: 3.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 22:33:14,717 INFO L158 Benchmark]: RCFGBuilder took 741.02ms. Allocated memory is still 104.9MB. Free memory was 56.9MB in the beginning and 65.5MB in the end (delta: -8.6MB). Peak memory consumption was 21.4MB. Max. memory is 16.1GB. [2021-11-12 22:33:14,717 INFO L158 Benchmark]: TraceAbstraction took 175238.40ms. Allocated memory was 104.9MB in the beginning and 151.0MB in the end (delta: 46.1MB). Free memory was 64.9MB in the beginning and 29.3MB in the end (delta: 35.6MB). Peak memory consumption was 83.4MB. Max. memory is 16.1GB. [2021-11-12 22:33:14,719 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 62.9MB. Free memory is still 42.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2735.38ms. Allocated memory was 62.9MB in the beginning and 104.9MB in the end (delta: 41.9MB). Free memory was 34.9MB in the beginning and 65.9MB in the end (delta: -31.0MB). Peak memory consumption was 48.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 161.01ms. Allocated memory is still 104.9MB. Free memory was 65.9MB in the beginning and 60.3MB in the end (delta: 5.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 58.82ms. Allocated memory is still 104.9MB. Free memory was 60.3MB in the beginning and 56.9MB in the end (delta: 3.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 741.02ms. Allocated memory is still 104.9MB. Free memory was 56.9MB in the beginning and 65.5MB in the end (delta: -8.6MB). Peak memory consumption was 21.4MB. Max. memory is 16.1GB. * TraceAbstraction took 175238.40ms. Allocated memory was 104.9MB in the beginning and 151.0MB in the end (delta: 46.1MB). Free memory was 64.9MB in the beginning and 29.3MB in the end (delta: 35.6MB). Peak memory consumption was 83.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:312) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f64b59-5ad7-4a69-ad1c-9bb30a0778ba/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken