./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 60926facf5511174d61dcd6a0b7a731efc9ccdb495bc26b58400da4cd6320ca0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:44:14,043 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:44:14,046 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:44:14,085 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:44:14,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:44:14,087 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:44:14,090 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:44:14,093 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:44:14,096 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:44:14,097 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:44:14,099 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:44:14,101 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:44:14,102 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:44:14,103 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:44:14,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:44:14,108 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:44:14,110 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:44:14,111 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:44:14,115 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:44:14,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:44:14,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:44:14,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:44:14,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:44:14,127 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:44:14,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:44:14,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:44:14,133 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:44:14,134 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:44:14,135 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:44:14,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:44:14,137 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:44:14,138 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:44:14,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:44:14,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:44:14,142 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:44:14,142 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:44:14,143 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:44:14,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:44:14,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:44:14,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:44:14,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:44:14,148 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 13:44:14,176 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:44:14,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:44:14,178 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:44:14,178 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:44:14,178 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:44:14,179 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:44:14,179 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:44:14,179 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:44:14,180 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:44:14,180 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:44:14,180 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:44:14,181 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:44:14,181 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:44:14,181 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:44:14,182 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:44:14,182 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:44:14,183 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:44:14,183 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:44:14,184 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:44:14,184 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:44:14,184 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:44:14,184 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:44:14,185 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:44:14,185 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:44:14,186 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:44:14,186 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:44:14,186 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:44:14,187 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:44:14,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:44:14,187 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:44:14,187 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:44:14,188 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:44:14,188 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:44:14,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:44:14,188 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:44:14,189 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:44:14,189 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:44:14,189 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_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60926facf5511174d61dcd6a0b7a731efc9ccdb495bc26b58400da4cd6320ca0 [2021-11-19 13:44:14,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:44:14,533 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:44:14,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:44:14,538 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:44:14,539 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:44:14,541 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i [2021-11-19 13:44:14,627 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/data/b9c913a95/f6e20b448d1d476d902ccddcc0360a3c/FLAG2991b1b1e [2021-11-19 13:44:15,524 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:44:15,524 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i [2021-11-19 13:44:15,582 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/data/b9c913a95/f6e20b448d1d476d902ccddcc0360a3c/FLAG2991b1b1e [2021-11-19 13:44:16,003 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/data/b9c913a95/f6e20b448d1d476d902ccddcc0360a3c [2021-11-19 13:44:16,006 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:44:16,008 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:44:16,010 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:44:16,010 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:44:16,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:44:16,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:44:16" (1/1) ... [2021-11-19 13:44:16,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e4182b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:44:16, skipping insertion in model container [2021-11-19 13:44:16,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:44:16" (1/1) ... [2021-11-19 13:44:16,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:44:16,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:44:16,563 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i[4505,4518] [2021-11-19 13:44:16,573 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i[4565,4578] [2021-11-19 13:44:16,606 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 13:44:16,616 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 13:44:17,810 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:17,812 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:17,812 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:17,813 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:17,815 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:17,832 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:17,833 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:17,840 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:17,841 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:18,283 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 13:44:18,285 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 13:44:18,286 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 13:44:18,288 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 13:44:18,289 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 13:44:18,290 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 13:44:18,291 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 13:44:18,292 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 13:44:18,293 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 13:44:18,293 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 13:44:18,471 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 13:44:18,631 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:18,632 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:18,714 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:44:18,782 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 13:44:18,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6b07d914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:44:18, skipping insertion in model container [2021-11-19 13:44:18,784 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:44:18,784 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:44:18,787 INFO L158 Benchmark]: Toolchain (without parser) took 2777.31ms. Allocated memory was 102.8MB in the beginning and 134.2MB in the end (delta: 31.5MB). Free memory was 60.6MB in the beginning and 88.3MB in the end (delta: -27.7MB). Peak memory consumption was 36.1MB. Max. memory is 16.1GB. [2021-11-19 13:44:18,788 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 102.8MB. Free memory was 55.6MB in the beginning and 55.5MB in the end (delta: 47.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:44:18,789 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2774.35ms. Allocated memory was 102.8MB in the beginning and 134.2MB in the end (delta: 31.5MB). Free memory was 60.4MB in the beginning and 88.3MB in the end (delta: -27.9MB). Peak memory consumption was 36.1MB. Max. memory is 16.1GB. [2021-11-19 13:44:18,791 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 102.8MB. Free memory was 55.6MB in the beginning and 55.5MB in the end (delta: 47.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2774.35ms. Allocated memory was 102.8MB in the beginning and 134.2MB in the end (delta: 31.5MB). Free memory was 60.4MB in the beginning and 88.3MB in the end (delta: -27.9MB). Peak memory consumption was 36.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 6990]: 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_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 60926facf5511174d61dcd6a0b7a731efc9ccdb495bc26b58400da4cd6320ca0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:44:21,155 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:44:21,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:44:21,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:44:21,207 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:44:21,211 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:44:21,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:44:21,219 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:44:21,222 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:44:21,230 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:44:21,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:44:21,234 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:44:21,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:44:21,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:44:21,240 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:44:21,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:44:21,246 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:44:21,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:44:21,262 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:44:21,270 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:44:21,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:44:21,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:44:21,277 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:44:21,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:44:21,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:44:21,289 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:44:21,290 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:44:21,292 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:44:21,293 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:44:21,294 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:44:21,294 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:44:21,295 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:44:21,298 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:44:21,299 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:44:21,300 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:44:21,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:44:21,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:44:21,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:44:21,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:44:21,304 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:44:21,305 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:44:21,311 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 13:44:21,346 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:44:21,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:44:21,348 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:44:21,348 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:44:21,348 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:44:21,348 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:44:21,349 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:44:21,349 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:44:21,349 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:44:21,349 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:44:21,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:44:21,352 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:44:21,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:44:21,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:44:21,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:44:21,353 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:44:21,353 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:44:21,353 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:44:21,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:44:21,354 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:44:21,354 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:44:21,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:44:21,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:44:21,355 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:44:21,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:44:21,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:44:21,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:44:21,356 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:44:21,356 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:44:21,356 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:44:21,357 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:44:21,357 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:44:21,357 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:44:21,357 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_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60926facf5511174d61dcd6a0b7a731efc9ccdb495bc26b58400da4cd6320ca0 [2021-11-19 13:44:21,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:44:21,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:44:21,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:44:21,787 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:44:21,788 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:44:21,790 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i [2021-11-19 13:44:21,871 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/data/2efc67c0e/a109fa759d5d448a993fd88a32d9763f/FLAG265c48bf6 [2021-11-19 13:44:22,955 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:44:22,956 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i [2021-11-19 13:44:23,020 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/data/2efc67c0e/a109fa759d5d448a993fd88a32d9763f/FLAG265c48bf6 [2021-11-19 13:44:23,321 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/data/2efc67c0e/a109fa759d5d448a993fd88a32d9763f [2021-11-19 13:44:23,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:44:23,327 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:44:23,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:44:23,330 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:44:23,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:44:23,335 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:44:23" (1/1) ... [2021-11-19 13:44:23,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4af096d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:44:23, skipping insertion in model container [2021-11-19 13:44:23,337 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:44:23" (1/1) ... [2021-11-19 13:44:23,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:44:23,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:44:23,882 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i[4505,4518] [2021-11-19 13:44:23,892 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i[4565,4578] [2021-11-19 13:44:23,923 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 13:44:23,931 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 13:44:25,032 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:25,033 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:25,034 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:25,035 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:25,036 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:25,052 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:25,053 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:25,055 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:25,056 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:25,547 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 13:44:25,548 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 13:44:25,550 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 13:44:25,551 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 13:44:25,553 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 13:44:25,554 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 13:44:25,555 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 13:44:25,556 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 13:44:25,556 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 13:44:25,557 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 13:44:25,775 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 13:44:25,976 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:25,981 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:26,078 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:44:26,158 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:44:26,228 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:44:26,242 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i[4505,4518] [2021-11-19 13:44:26,244 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i[4565,4578] [2021-11-19 13:44:26,246 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 13:44:26,249 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 13:44:26,297 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:26,298 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:26,298 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:26,299 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:26,299 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:26,319 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:26,319 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:26,320 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:26,321 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:26,358 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 13:44:26,359 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 13:44:26,360 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 13:44:26,361 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 13:44:26,362 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 13:44:26,363 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 13:44:26,363 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 13:44:26,364 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 13:44:26,364 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 13:44:26,364 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 13:44:26,408 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 13:44:26,466 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:26,466 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:26,493 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:44:26,547 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:44:26,562 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i[4505,4518] [2021-11-19 13:44:26,563 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i[4565,4578] [2021-11-19 13:44:26,564 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 13:44:26,565 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 13:44:26,608 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:26,609 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:26,609 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:26,610 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:26,611 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:26,618 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:26,619 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:26,620 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:26,620 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:26,669 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 13:44:26,670 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 13:44:26,671 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 13:44:26,672 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 13:44:26,673 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 13:44:26,674 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 13:44:26,675 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 13:44:26,675 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 13:44:26,676 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 13:44:26,677 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 13:44:26,703 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 13:44:26,802 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:26,803 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:44:26,845 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:44:27,316 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:44:27,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:44:27 WrapperNode [2021-11-19 13:44:27,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:44:27,318 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:44:27,318 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:44:27,319 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:44:27,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:44:27" (1/1) ... [2021-11-19 13:44:27,489 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:44:27" (1/1) ... [2021-11-19 13:44:27,610 INFO L137 Inliner]: procedures = 713, calls = 2658, calls flagged for inlining = 59, calls inlined = 6, statements flattened = 918 [2021-11-19 13:44:27,610 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:44:27,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:44:27,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:44:27,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:44:27,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:44:27" (1/1) ... [2021-11-19 13:44:27,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:44:27" (1/1) ... [2021-11-19 13:44:27,653 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:44:27" (1/1) ... [2021-11-19 13:44:27,653 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:44:27" (1/1) ... [2021-11-19 13:44:27,713 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:44:27" (1/1) ... [2021-11-19 13:44:27,735 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:44:27" (1/1) ... [2021-11-19 13:44:27,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:44:27" (1/1) ... [2021-11-19 13:44:27,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:44:27,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:44:27,778 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:44:27,778 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:44:27,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:44:27" (1/1) ... [2021-11-19 13:44:27,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:44:27,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:44:27,815 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:44:27,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:44:27,867 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-11-19 13:44:27,867 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-11-19 13:44:27,867 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_compare_lexical [2021-11-19 13:44:27,867 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_compare_lexical [2021-11-19 13:44:27,867 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-19 13:44:27,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 13:44:27,868 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-19 13:44:27,869 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-19 13:44:27,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:44:27,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-19 13:44:27,870 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_bounded [2021-11-19 13:44:27,870 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_bounded [2021-11-19 13:44:27,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 13:44:27,870 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 13:44:27,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 13:44:27,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:44:27,870 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-11-19 13:44:27,871 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-11-19 13:44:27,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 13:44:27,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:44:27,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:44:27,871 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-19 13:44:27,871 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-19 13:44:27,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 13:44:27,872 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-19 13:44:27,872 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-19 13:44:27,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-19 13:44:27,872 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 13:44:27,872 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 13:44:27,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 13:44:27,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 13:44:27,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-19 13:44:27,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 13:44:27,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 13:44:27,873 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-19 13:44:27,873 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-19 13:44:27,874 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_byte_cursor_has_allocated_buffer_member [2021-11-19 13:44:27,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_byte_cursor_has_allocated_buffer_member [2021-11-19 13:44:28,267 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:44:28,270 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:44:30,532 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:44:30,543 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:44:30,544 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 13:44:30,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:44:30 BoogieIcfgContainer [2021-11-19 13:44:30,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:44:30,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:44:30,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:44:30,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:44:30,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:44:23" (1/3) ... [2021-11-19 13:44:30,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a89ba02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:44:30, skipping insertion in model container [2021-11-19 13:44:30,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:44:27" (2/3) ... [2021-11-19 13:44:30,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a89ba02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:44:30, skipping insertion in model container [2021-11-19 13:44:30,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:44:30" (3/3) ... [2021-11-19 13:44:30,572 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_compare_lexical_harness.i [2021-11-19 13:44:30,578 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:44:30,578 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:44:30,647 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:44:30,656 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 13:44:30,656 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:44:30,681 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 90 states have (on average 1.2333333333333334) internal successors, (111), 91 states have internal predecessors, (111), 46 states have call successors, (46), 11 states have call predecessors, (46), 11 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-11-19 13:44:30,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 13:44:30,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:44:30,704 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:44:30,705 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:44:30,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:44:30,711 INFO L85 PathProgramCache]: Analyzing trace with hash 720675663, now seen corresponding path program 1 times [2021-11-19 13:44:30,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:44:30,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645239002] [2021-11-19 13:44:30,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:44:30,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:44:30,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:44:30,737 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:44:30,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:44:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:44:31,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 1536 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 13:44:31,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:44:32,418 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-11-19 13:44:32,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:44:32,958 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-19 13:44:32,959 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:44:32,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645239002] [2021-11-19 13:44:32,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645239002] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:44:32,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:44:32,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-19 13:44:32,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429188390] [2021-11-19 13:44:32,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:44:32,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:44:32,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:44:33,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:44:33,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:44:33,023 INFO L87 Difference]: Start difference. First operand has 149 states, 90 states have (on average 1.2333333333333334) internal successors, (111), 91 states have internal predecessors, (111), 46 states have call successors, (46), 11 states have call predecessors, (46), 11 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-19 13:44:33,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:44:33,591 INFO L93 Difference]: Finished difference Result 297 states and 443 transitions. [2021-11-19 13:44:33,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:44:33,595 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 120 [2021-11-19 13:44:33,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:44:33,606 INFO L225 Difference]: With dead ends: 297 [2021-11-19 13:44:33,606 INFO L226 Difference]: Without dead ends: 146 [2021-11-19 13:44:33,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:44:33,616 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 46 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:44:33,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 489 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 13:44:33,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-19 13:44:33,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-11-19 13:44:33,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 87 states have (on average 1.206896551724138) internal successors, (105), 89 states have internal predecessors, (105), 46 states have call successors, (46), 11 states have call predecessors, (46), 12 states have return successors, (51), 45 states have call predecessors, (51), 45 states have call successors, (51) [2021-11-19 13:44:33,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 202 transitions. [2021-11-19 13:44:33,679 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 202 transitions. Word has length 120 [2021-11-19 13:44:33,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:44:33,680 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 202 transitions. [2021-11-19 13:44:33,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-19 13:44:33,680 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 202 transitions. [2021-11-19 13:44:33,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-19 13:44:33,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:44:33,685 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:44:33,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:44:33,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:44:33,900 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:44:33,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:44:33,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1914357044, now seen corresponding path program 1 times [2021-11-19 13:44:33,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:44:33,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268950566] [2021-11-19 13:44:33,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:44:33,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:44:33,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:44:33,910 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:44:33,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:44:34,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:44:35,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 1540 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 13:44:35,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:44:35,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-19 13:44:35,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-19 13:44:35,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-19 13:44:35,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-19 13:44:36,287 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 97 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-19 13:44:36,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:44:37,144 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 38 treesize of output 32 [2021-11-19 13:44:37,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:44:37,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:44:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-11-19 13:44:37,264 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:44:37,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268950566] [2021-11-19 13:44:37,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268950566] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:44:37,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1230616071] [2021-11-19 13:44:37,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:44:37,265 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:44:37,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:44:37,269 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:44:37,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-19 13:44:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:44:38,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 1540 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:44:38,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:44:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-19 13:44:38,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:44:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-19 13:44:39,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1230616071] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:44:39,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 13:44:39,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11, 9, 7] total 18 [2021-11-19 13:44:39,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90005278] [2021-11-19 13:44:39,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:44:39,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:44:39,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:44:39,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:44:39,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-11-19 13:44:39,156 INFO L87 Difference]: Start difference. First operand 146 states and 202 transitions. Second operand has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 4 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-19 13:44:40,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:44:40,126 INFO L93 Difference]: Finished difference Result 238 states and 333 transitions. [2021-11-19 13:44:40,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:44:40,131 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 4 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) Word has length 122 [2021-11-19 13:44:40,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:44:40,135 INFO L225 Difference]: With dead ends: 238 [2021-11-19 13:44:40,135 INFO L226 Difference]: Without dead ends: 146 [2021-11-19 13:44:40,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 465 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:44:40,138 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 77 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:44:40,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 752 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 13:44:40,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-19 13:44:40,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-11-19 13:44:40,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 87 states have (on average 1.206896551724138) internal successors, (105), 89 states have internal predecessors, (105), 46 states have call successors, (46), 11 states have call predecessors, (46), 12 states have return successors, (49), 45 states have call predecessors, (49), 45 states have call successors, (49) [2021-11-19 13:44:40,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 200 transitions. [2021-11-19 13:44:40,162 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 200 transitions. Word has length 122 [2021-11-19 13:44:40,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:44:40,163 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 200 transitions. [2021-11-19 13:44:40,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 4 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-19 13:44:40,163 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 200 transitions. [2021-11-19 13:44:40,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 13:44:40,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:44:40,167 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:44:40,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-19 13:44:40,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:44:40,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:44:40,596 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:44:40,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:44:40,597 INFO L85 PathProgramCache]: Analyzing trace with hash 875575230, now seen corresponding path program 2 times [2021-11-19 13:44:40,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:44:40,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071375222] [2021-11-19 13:44:40,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 13:44:40,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:44:40,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:44:40,603 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:44:40,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 13:44:41,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-19 13:44:41,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:44:41,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 1311 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:44:41,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:44:41,679 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-19 13:44:41,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:44:42,065 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-19 13:44:42,065 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:44:42,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071375222] [2021-11-19 13:44:42,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071375222] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:44:42,066 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:44:42,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-19 13:44:42,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259685587] [2021-11-19 13:44:42,066 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:44:42,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 13:44:42,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:44:42,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 13:44:42,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:44:42,071 INFO L87 Difference]: Start difference. First operand 146 states and 200 transitions. Second operand has 12 states, 10 states have (on average 5.0) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-19 13:44:42,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:44:42,245 INFO L93 Difference]: Finished difference Result 158 states and 219 transitions. [2021-11-19 13:44:42,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:44:42,246 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 5.0) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 1 states have call successors, (20) Word has length 126 [2021-11-19 13:44:42,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:44:42,250 INFO L225 Difference]: With dead ends: 158 [2021-11-19 13:44:42,250 INFO L226 Difference]: Without dead ends: 156 [2021-11-19 13:44:42,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:44:42,252 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 22 mSDsluCounter, 1533 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1729 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:44:42,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 1729 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:44:42,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-19 13:44:42,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2021-11-19 13:44:42,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 93 states have (on average 1.1935483870967742) internal successors, (111), 96 states have internal predecessors, (111), 47 states have call successors, (47), 12 states have call predecessors, (47), 14 states have return successors, (58), 46 states have call predecessors, (58), 46 states have call successors, (58) [2021-11-19 13:44:42,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 216 transitions. [2021-11-19 13:44:42,276 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 216 transitions. Word has length 126 [2021-11-19 13:44:42,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:44:42,277 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 216 transitions. [2021-11-19 13:44:42,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 5.0) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-19 13:44:42,277 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 216 transitions. [2021-11-19 13:44:42,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 13:44:42,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:44:42,280 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:44:42,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-19 13:44:42,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:44:42,495 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:44:42,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:44:42,496 INFO L85 PathProgramCache]: Analyzing trace with hash -16578938, now seen corresponding path program 1 times [2021-11-19 13:44:42,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:44:42,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [178175588] [2021-11-19 13:44:42,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:44:42,498 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:44:42,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:44:42,499 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:44:42,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:44:43,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:44:43,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 1557 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 13:44:43,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:44:43,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-19 13:44:43,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-19 13:44:44,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-19 13:44:44,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-19 13:44:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 101 proven. 4 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-19 13:44:44,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:44:45,523 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 38 treesize of output 32 [2021-11-19 13:44:45,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:44:45,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:44:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-11-19 13:44:45,617 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:44:45,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [178175588] [2021-11-19 13:44:45,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [178175588] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:44:45,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [292957788] [2021-11-19 13:44:45,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:44:45,618 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:44:45,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:44:45,619 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:44:45,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-19 13:44:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:44:46,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 1557 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:44:46,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:44:46,837 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-19 13:44:46,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:44:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-11-19 13:44:47,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [292957788] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:44:47,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 13:44:47,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11, 9, 7] total 18 [2021-11-19 13:44:47,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800063991] [2021-11-19 13:44:47,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:44:47,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:44:47,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:44:47,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:44:47,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-11-19 13:44:47,268 INFO L87 Difference]: Start difference. First operand 155 states and 216 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 6 states have internal predecessors, (58), 4 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-19 13:44:48,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:44:48,101 INFO L93 Difference]: Finished difference Result 303 states and 433 transitions. [2021-11-19 13:44:48,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:44:48,103 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 6 states have internal predecessors, (58), 4 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 130 [2021-11-19 13:44:48,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:44:48,107 INFO L225 Difference]: With dead ends: 303 [2021-11-19 13:44:48,107 INFO L226 Difference]: Without dead ends: 185 [2021-11-19 13:44:48,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 497 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:44:48,110 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 76 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:44:48,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 857 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 13:44:48,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-19 13:44:48,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-11-19 13:44:48,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 109 states have (on average 1.201834862385321) internal successors, (131), 112 states have internal predecessors, (131), 60 states have call successors, (60), 13 states have call predecessors, (60), 15 states have return successors, (73), 59 states have call predecessors, (73), 59 states have call successors, (73) [2021-11-19 13:44:48,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 264 transitions. [2021-11-19 13:44:48,141 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 264 transitions. Word has length 130 [2021-11-19 13:44:48,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:44:48,142 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 264 transitions. [2021-11-19 13:44:48,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 6 states have internal predecessors, (58), 4 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-19 13:44:48,142 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 264 transitions. [2021-11-19 13:44:48,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 13:44:48,145 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:44:48,145 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:44:48,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:44:48,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-11-19 13:44:48,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:44:48,571 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:44:48,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:44:48,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1086480213, now seen corresponding path program 1 times [2021-11-19 13:44:48,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:44:48,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410561629] [2021-11-19 13:44:48,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:44:48,574 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:44:48,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:44:48,575 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:44:48,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:44:49,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:44:49,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 1561 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 13:44:49,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:44:49,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-19 13:44:49,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-19 13:44:50,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-19 13:44:50,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-19 13:44:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 103 proven. 4 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 13:44:50,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:44:51,214 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 38 treesize of output 32 [2021-11-19 13:44:51,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:44:51,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:44:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-19 13:44:51,295 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:44:51,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410561629] [2021-11-19 13:44:51,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410561629] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:44:51,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1755169954] [2021-11-19 13:44:51,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:44:51,295 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:44:51,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:44:51,297 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:44:51,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-19 13:44:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:44:54,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 1561 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 13:44:54,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:45:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 102 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-19 13:45:01,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:45:05,424 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-11-19 13:45:05,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1755169954] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:45:05,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564317602] [2021-11-19 13:45:05,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:45:05,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:45:05,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:45:05,432 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:45:05,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 13:45:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:45:06,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 1561 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-19 13:45:06,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:45:13,554 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 99 proven. 9 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-19 13:45:13,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:45:17,352 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-11-19 13:45:17,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564317602] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:45:17,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:45:17,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 14, 9, 16, 10] total 47 [2021-11-19 13:45:17,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490624920] [2021-11-19 13:45:17,353 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:45:17,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-19 13:45:17,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:45:17,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-19 13:45:17,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2010, Unknown=0, NotChecked=0, Total=2162 [2021-11-19 13:45:17,358 INFO L87 Difference]: Start difference. First operand 185 states and 264 transitions. Second operand has 47 states, 43 states have (on average 4.72093023255814) internal successors, (203), 44 states have internal predecessors, (203), 15 states have call successors, (89), 8 states have call predecessors, (89), 15 states have return successors, (89), 11 states have call predecessors, (89), 15 states have call successors, (89) [2021-11-19 13:46:14,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:46:14,483 INFO L93 Difference]: Finished difference Result 562 states and 829 transitions. [2021-11-19 13:46:14,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-19 13:46:14,484 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 43 states have (on average 4.72093023255814) internal successors, (203), 44 states have internal predecessors, (203), 15 states have call successors, (89), 8 states have call predecessors, (89), 15 states have return successors, (89), 11 states have call predecessors, (89), 15 states have call successors, (89) Word has length 132 [2021-11-19 13:46:14,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:46:14,489 INFO L225 Difference]: With dead ends: 562 [2021-11-19 13:46:14,489 INFO L226 Difference]: Without dead ends: 353 [2021-11-19 13:46:14,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 880 GetRequests, 734 SyntacticMatches, 23 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4388 ImplicationChecksByTransitivity, 49.8s TimeCoverageRelationStatistics Valid=1255, Invalid=14245, Unknown=0, NotChecked=0, Total=15500 [2021-11-19 13:46:14,498 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 506 mSDsluCounter, 2108 mSDsCounter, 0 mSdLazyCounter, 3502 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 2317 SdHoareTripleChecker+Invalid, 5697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 3502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1903 IncrementalHoareTripleChecker+Unchecked, 24.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:46:14,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 2317 Invalid, 5697 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [292 Valid, 3502 Invalid, 0 Unknown, 1903 Unchecked, 24.0s Time] [2021-11-19 13:46:14,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-11-19 13:46:14,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 283. [2021-11-19 13:46:14,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 181 states have (on average 1.1933701657458564) internal successors, (216), 188 states have internal predecessors, (216), 76 states have call successors, (76), 19 states have call predecessors, (76), 25 states have return successors, (122), 75 states have call predecessors, (122), 75 states have call successors, (122) [2021-11-19 13:46:14,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 414 transitions. [2021-11-19 13:46:14,546 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 414 transitions. Word has length 132 [2021-11-19 13:46:14,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:46:14,547 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 414 transitions. [2021-11-19 13:46:14,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 43 states have (on average 4.72093023255814) internal successors, (203), 44 states have internal predecessors, (203), 15 states have call successors, (89), 8 states have call predecessors, (89), 15 states have return successors, (89), 11 states have call predecessors, (89), 15 states have call successors, (89) [2021-11-19 13:46:14,548 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 414 transitions. [2021-11-19 13:46:14,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-19 13:46:14,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:46:14,551 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:46:14,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:46:14,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:46:14,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-19 13:46:15,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:46:15,176 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:46:15,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:46:15,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1964176643, now seen corresponding path program 1 times [2021-11-19 13:46:15,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:46:15,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1061762691] [2021-11-19 13:46:15,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:46:15,178 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:46:15,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:46:15,179 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:46:15,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 13:46:16,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:46:16,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 1588 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 13:46:16,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:46:18,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:46:18,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 99 treesize of output 35 [2021-11-19 13:46:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 163 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-19 13:46:18,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:46:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2021-11-19 13:46:20,249 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:46:20,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1061762691] [2021-11-19 13:46:20,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1061762691] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:46:20,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1961478003] [2021-11-19 13:46:20,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:46:20,249 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:46:20,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:46:20,250 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:46:20,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-19 13:46:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:46:20,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 1588 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:46:20,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:46:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-11-19 13:46:22,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:46:22,765 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-11-19 13:46:22,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1961478003] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:46:22,765 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:46:22,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [12, 7] total 21 [2021-11-19 13:46:22,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311464913] [2021-11-19 13:46:22,766 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:46:22,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:46:22,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:46:22,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:46:22,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-11-19 13:46:22,767 INFO L87 Difference]: Start difference. First operand 283 states and 414 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-11-19 13:46:24,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:46:24,671 INFO L93 Difference]: Finished difference Result 559 states and 837 transitions. [2021-11-19 13:46:24,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:46:24,675 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 145 [2021-11-19 13:46:24,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:46:24,679 INFO L225 Difference]: With dead ends: 559 [2021-11-19 13:46:24,680 INFO L226 Difference]: Without dead ends: 283 [2021-11-19 13:46:24,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 548 SyntacticMatches, 9 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-11-19 13:46:24,683 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 20 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:46:24,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 879 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 38 Unchecked, 1.2s Time] [2021-11-19 13:46:24,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-19 13:46:24,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2021-11-19 13:46:24,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 181 states have (on average 1.1823204419889504) internal successors, (214), 188 states have internal predecessors, (214), 76 states have call successors, (76), 19 states have call predecessors, (76), 25 states have return successors, (122), 75 states have call predecessors, (122), 75 states have call successors, (122) [2021-11-19 13:46:24,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 412 transitions. [2021-11-19 13:46:24,723 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 412 transitions. Word has length 145 [2021-11-19 13:46:24,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:46:24,724 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 412 transitions. [2021-11-19 13:46:24,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-11-19 13:46:24,725 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 412 transitions. [2021-11-19 13:46:24,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-19 13:46:24,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:46:24,728 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:46:24,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-19 13:46:24,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:46:25,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:46:25,132 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:46:25,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:46:25,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1263112065, now seen corresponding path program 1 times [2021-11-19 13:46:25,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:46:25,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10505126] [2021-11-19 13:46:25,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:46:25,135 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:46:25,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:46:25,137 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:46:25,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 13:46:26,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:46:26,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 1591 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 13:46:26,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:46:29,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:46:29,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 99 treesize of output 35 [2021-11-19 13:46:29,251 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 163 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-19 13:46:29,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:46:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2021-11-19 13:46:31,106 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:46:31,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10505126] [2021-11-19 13:46:31,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10505126] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:46:31,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1962878002] [2021-11-19 13:46:31,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:46:31,107 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:46:31,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:46:31,108 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:46:31,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-19 13:46:33,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:46:33,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 1591 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-19 13:46:33,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:46:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 126 proven. 10 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-19 13:46:38,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:46:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-11-19 13:46:41,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1962878002] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:46:41,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254387052] [2021-11-19 13:46:41,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:46:41,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:46:41,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:46:41,595 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:46:41,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-19 13:46:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:46:43,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 1591 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 13:46:43,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:46:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 126 proven. 10 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-19 13:46:46,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:46:48,716 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-11-19 13:46:48,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254387052] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:46:48,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:46:48,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 15, 9, 14, 9] total 24 [2021-11-19 13:46:48,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615745500] [2021-11-19 13:46:48,717 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:46:48,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 13:46:48,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:46:48,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 13:46:48,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-11-19 13:46:48,720 INFO L87 Difference]: Start difference. First operand 283 states and 412 transitions. Second operand has 24 states, 23 states have (on average 6.130434782608695) internal successors, (141), 23 states have internal predecessors, (141), 6 states have call successors, (48), 5 states have call predecessors, (48), 7 states have return successors, (45), 5 states have call predecessors, (45), 6 states have call successors, (45) [2021-11-19 13:47:03,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:47:03,087 INFO L93 Difference]: Finished difference Result 566 states and 817 transitions. [2021-11-19 13:47:03,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-19 13:47:03,091 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 6.130434782608695) internal successors, (141), 23 states have internal predecessors, (141), 6 states have call successors, (48), 5 states have call predecessors, (48), 7 states have return successors, (45), 5 states have call predecessors, (45), 6 states have call successors, (45) Word has length 145 [2021-11-19 13:47:03,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:47:03,095 INFO L225 Difference]: With dead ends: 566 [2021-11-19 13:47:03,095 INFO L226 Difference]: Without dead ends: 351 [2021-11-19 13:47:03,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 895 GetRequests, 809 SyntacticMatches, 43 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=291, Invalid=1689, Unknown=0, NotChecked=0, Total=1980 [2021-11-19 13:47:03,099 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 177 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 1666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 617 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:47:03,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 1036 Invalid, 1666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 939 Invalid, 0 Unknown, 617 Unchecked, 9.5s Time] [2021-11-19 13:47:03,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-11-19 13:47:03,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 306. [2021-11-19 13:47:03,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 196 states have (on average 1.1479591836734695) internal successors, (225), 202 states have internal predecessors, (225), 82 states have call successors, (82), 22 states have call predecessors, (82), 27 states have return successors, (121), 81 states have call predecessors, (121), 81 states have call successors, (121) [2021-11-19 13:47:03,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 428 transitions. [2021-11-19 13:47:03,142 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 428 transitions. Word has length 145 [2021-11-19 13:47:03,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:47:03,143 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 428 transitions. [2021-11-19 13:47:03,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 6.130434782608695) internal successors, (141), 23 states have internal predecessors, (141), 6 states have call successors, (48), 5 states have call predecessors, (48), 7 states have return successors, (45), 5 states have call predecessors, (45), 6 states have call successors, (45) [2021-11-19 13:47:03,143 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 428 transitions. [2021-11-19 13:47:03,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-19 13:47:03,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:47:03,147 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:47:03,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-19 13:47:03,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-19 13:47:03,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-19 13:47:03,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:47:03,772 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:47:03,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:47:03,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1508088386, now seen corresponding path program 1 times [2021-11-19 13:47:03,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:47:03,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731962399] [2021-11-19 13:47:03,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:47:03,774 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:47:03,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:47:03,775 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:47:03,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 13:47:04,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:47:04,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 1590 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-19 13:47:04,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:47:11,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:47:11,286 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 223 treesize of output 215 [2021-11-19 13:47:11,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:47:11,311 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 215 treesize of output 207 [2021-11-19 13:47:11,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:47:11,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 207 treesize of output 175 [2021-11-19 13:47:12,389 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 151 proven. 3 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-19 13:47:12,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:47:40,191 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 231 treesize of output 219 [2021-11-19 13:47:40,198 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-11-19 13:47:40,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 219 treesize of output 1 [2021-11-19 13:47:40,300 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 19 proven. 34 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-19 13:47:40,300 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:47:40,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731962399] [2021-11-19 13:47:40,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731962399] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:47:40,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [264931582] [2021-11-19 13:47:40,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:47:40,301 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:47:40,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:47:40,302 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:47:40,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 13:47:40,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:47:40,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 1590 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:47:40,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:47:42,262 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-19 13:47:42,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:47:42,613 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-11-19 13:47:42,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [264931582] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:47:42,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 13:47:42,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [22, 21, 9] total 43 [2021-11-19 13:47:42,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879501803] [2021-11-19 13:47:42,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:47:42,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 13:47:42,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:47:42,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 13:47:42,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1665, Unknown=3, NotChecked=0, Total=1806 [2021-11-19 13:47:42,615 INFO L87 Difference]: Start difference. First operand 306 states and 428 transitions. Second operand has 9 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-19 13:47:43,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:47:43,510 INFO L93 Difference]: Finished difference Result 548 states and 771 transitions. [2021-11-19 13:47:43,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 13:47:43,511 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 147 [2021-11-19 13:47:43,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:47:43,515 INFO L225 Difference]: With dead ends: 548 [2021-11-19 13:47:43,515 INFO L226 Difference]: Without dead ends: 316 [2021-11-19 13:47:43,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=158, Invalid=1909, Unknown=3, NotChecked=0, Total=2070 [2021-11-19 13:47:43,519 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 11 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1415 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:47:43,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1415 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:47:43,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-19 13:47:43,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 311. [2021-11-19 13:47:43,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 200 states have (on average 1.145) internal successors, (229), 207 states have internal predecessors, (229), 82 states have call successors, (82), 22 states have call predecessors, (82), 28 states have return successors, (129), 81 states have call predecessors, (129), 81 states have call successors, (129) [2021-11-19 13:47:43,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 440 transitions. [2021-11-19 13:47:43,552 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 440 transitions. Word has length 147 [2021-11-19 13:47:43,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:47:43,553 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 440 transitions. [2021-11-19 13:47:43,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-19 13:47:43,553 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 440 transitions. [2021-11-19 13:47:43,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-19 13:47:43,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:47:43,557 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:47:43,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-19 13:47:43,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 13:47:43,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:47:43,962 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:47:43,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:47:43,962 INFO L85 PathProgramCache]: Analyzing trace with hash -2104276219, now seen corresponding path program 1 times [2021-11-19 13:47:43,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:47:43,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [383559586] [2021-11-19 13:47:43,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:47:43,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:47:43,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:47:43,965 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:47:43,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 13:47:44,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:47:44,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 1597 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-19 13:47:44,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:47:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 135 proven. 3 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-19 13:47:50,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:48:14,396 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 231 treesize of output 219 [2021-11-19 13:48:14,404 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-11-19 13:48:14,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 219 treesize of output 1 [2021-11-19 13:48:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-19 13:48:14,509 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:48:14,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [383559586] [2021-11-19 13:48:14,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [383559586] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:48:14,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1749545436] [2021-11-19 13:48:14,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:48:14,509 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:48:14,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:48:14,510 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:48:14,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-19 13:48:15,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:48:15,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 1597 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:48:15,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:48:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-11-19 13:48:16,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:48:17,854 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-11-19 13:48:17,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1749545436] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:48:17,854 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:48:17,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [17, 16] total 35 [2021-11-19 13:48:17,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034313465] [2021-11-19 13:48:17,855 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:48:17,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:48:17,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:48:17,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:48:17,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1059, Unknown=4, NotChecked=0, Total=1190 [2021-11-19 13:48:17,860 INFO L87 Difference]: Start difference. First operand 311 states and 440 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-11-19 13:48:19,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:48:19,141 INFO L93 Difference]: Finished difference Result 599 states and 855 transitions. [2021-11-19 13:48:19,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:48:19,146 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 149 [2021-11-19 13:48:19,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:48:19,149 INFO L225 Difference]: With dead ends: 599 [2021-11-19 13:48:19,149 INFO L226 Difference]: Without dead ends: 294 [2021-11-19 13:48:19,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 559 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=133, Invalid=1123, Unknown=4, NotChecked=0, Total=1260 [2021-11-19 13:48:19,152 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 6 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:48:19,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 701 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 28 Unchecked, 0.6s Time] [2021-11-19 13:48:19,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-11-19 13:48:19,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2021-11-19 13:48:19,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 185 states have (on average 1.1297297297297297) internal successors, (209), 190 states have internal predecessors, (209), 82 states have call successors, (82), 22 states have call predecessors, (82), 26 states have return successors, (106), 81 states have call predecessors, (106), 81 states have call successors, (106) [2021-11-19 13:48:19,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 397 transitions. [2021-11-19 13:48:19,178 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 397 transitions. Word has length 149 [2021-11-19 13:48:19,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:48:19,179 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 397 transitions. [2021-11-19 13:48:19,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-11-19 13:48:19,180 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 397 transitions. [2021-11-19 13:48:19,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-19 13:48:19,182 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:48:19,182 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:48:19,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-19 13:48:19,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 13:48:19,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:48:19,596 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:48:19,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:48:19,597 INFO L85 PathProgramCache]: Analyzing trace with hash -4096445, now seen corresponding path program 1 times [2021-11-19 13:48:19,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:48:19,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541725200] [2021-11-19 13:48:19,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:48:19,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:48:19,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:48:19,602 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:48:19,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 13:48:21,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:48:21,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 1597 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-19 13:48:21,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:48:21,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-19 13:48:22,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-19 13:48:22,262 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 22 treesize of output 14 [2021-11-19 13:48:22,453 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 20 treesize of output 8 [2021-11-19 13:48:30,752 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-11-19 13:48:30,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 209 treesize of output 81 [2021-11-19 13:48:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 85 proven. 82 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-19 13:48:31,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:48:40,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:48:40,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:48:40,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:48:40,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:48:40,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:48:40,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:48:40,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:48:40,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:48:40,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:48:40,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:48:40,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:48:40,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:48:40,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:48:40,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:48:40,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:48:40,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:48:40,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:48:40,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:48:40,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:48:40,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:48:40,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:48:40,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:48:40,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:48:40,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:48:40,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:48:40,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:48:40,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:48:40,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:48:40,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 17 [2021-11-19 13:48:42,894 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 40 treesize of output 34 [2021-11-19 13:48:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-11-19 13:48:43,040 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:48:43,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [541725200] [2021-11-19 13:48:43,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [541725200] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:48:43,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [517760951] [2021-11-19 13:48:43,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:48:43,041 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:48:43,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:48:43,050 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:48:43,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 13:48:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:48:49,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 1597 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:48:49,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:48:50,556 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-11-19 13:48:50,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:48:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-11-19 13:48:51,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [517760951] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:48:51,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 13:48:51,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [27, 25, 8] total 49 [2021-11-19 13:48:51,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826908743] [2021-11-19 13:48:51,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:48:51,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:48:51,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:48:51,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:48:51,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2208, Unknown=0, NotChecked=0, Total=2352 [2021-11-19 13:48:51,189 INFO L87 Difference]: Start difference. First operand 294 states and 397 transitions. Second operand has 8 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2021-11-19 13:48:51,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:48:51,886 INFO L93 Difference]: Finished difference Result 304 states and 408 transitions. [2021-11-19 13:48:51,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:48:51,887 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) Word has length 153 [2021-11-19 13:48:51,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:48:51,890 INFO L225 Difference]: With dead ends: 304 [2021-11-19 13:48:51,891 INFO L226 Difference]: Without dead ends: 302 [2021-11-19 13:48:51,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 534 SyntacticMatches, 27 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=154, Invalid=2396, Unknown=0, NotChecked=0, Total=2550 [2021-11-19 13:48:51,894 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 13 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:48:51,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 1314 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:48:51,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-19 13:48:51,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 300. [2021-11-19 13:48:51,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 188 states have (on average 1.127659574468085) internal successors, (212), 193 states have internal predecessors, (212), 84 states have call successors, (84), 23 states have call predecessors, (84), 27 states have return successors, (108), 83 states have call predecessors, (108), 83 states have call successors, (108) [2021-11-19 13:48:51,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 404 transitions. [2021-11-19 13:48:51,929 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 404 transitions. Word has length 153 [2021-11-19 13:48:51,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:48:51,931 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 404 transitions. [2021-11-19 13:48:51,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2021-11-19 13:48:51,932 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 404 transitions. [2021-11-19 13:48:51,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-19 13:48:51,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:48:51,935 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:48:51,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-19 13:48:52,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-19 13:48:52,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:48:52,353 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:48:52,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:48:52,353 INFO L85 PathProgramCache]: Analyzing trace with hash 801814094, now seen corresponding path program 2 times [2021-11-19 13:48:52,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:48:52,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1052463928] [2021-11-19 13:48:52,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 13:48:52,356 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:48:52,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:48:52,357 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:48:52,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 13:48:52,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-19 13:48:52,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:48:53,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 1327 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 13:48:53,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:48:57,269 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-11-19 13:48:57,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:48:59,047 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-11-19 13:48:59,047 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:48:59,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1052463928] [2021-11-19 13:48:59,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1052463928] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:48:59,048 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:48:59,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 13] imperfect sequences [] total 23 [2021-11-19 13:48:59,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780614619] [2021-11-19 13:48:59,048 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:48:59,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-19 13:48:59,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:48:59,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-19 13:48:59,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-11-19 13:48:59,050 INFO L87 Difference]: Start difference. First operand 300 states and 404 transitions. Second operand has 23 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 19 states have internal predecessors, (72), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 1 states have call successors, (22) [2021-11-19 13:49:03,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:49:03,148 INFO L93 Difference]: Finished difference Result 313 states and 417 transitions. [2021-11-19 13:49:03,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 13:49:03,150 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 19 states have internal predecessors, (72), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 1 states have call successors, (22) Word has length 151 [2021-11-19 13:49:03,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:49:03,154 INFO L225 Difference]: With dead ends: 313 [2021-11-19 13:49:03,154 INFO L226 Difference]: Without dead ends: 311 [2021-11-19 13:49:03,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-11-19 13:49:03,156 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 44 mSDsluCounter, 2741 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 2938 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:49:03,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 2938 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 323 Invalid, 0 Unknown, 97 Unchecked, 2.0s Time] [2021-11-19 13:49:03,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-19 13:49:03,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 298. [2021-11-19 13:49:03,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 188 states have (on average 1.127659574468085) internal successors, (212), 193 states have internal predecessors, (212), 82 states have call successors, (82), 23 states have call predecessors, (82), 27 states have return successors, (106), 81 states have call predecessors, (106), 81 states have call successors, (106) [2021-11-19 13:49:03,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 400 transitions. [2021-11-19 13:49:03,191 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 400 transitions. Word has length 151 [2021-11-19 13:49:03,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:49:03,191 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 400 transitions. [2021-11-19 13:49:03,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 19 states have internal predecessors, (72), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 1 states have call successors, (22) [2021-11-19 13:49:03,192 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 400 transitions. [2021-11-19 13:49:03,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-19 13:49:03,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:49:03,196 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:49:03,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 13:49:03,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:49:03,411 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:49:03,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:49:03,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1955118453, now seen corresponding path program 1 times [2021-11-19 13:49:03,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:49:03,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [973982657] [2021-11-19 13:49:03,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:49:03,414 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:49:03,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:49:03,417 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:49:03,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 13:49:04,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:49:04,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 1606 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-19 13:49:04,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:49:05,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-19 13:49:05,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-19 13:49:05,940 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 22 treesize of output 14 [2021-11-19 13:49:06,124 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 20 treesize of output 8 [2021-11-19 13:49:12,792 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 87 proven. 80 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-19 13:49:12,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:49:20,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:49:20,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:49:20,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:49:20,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:49:20,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:49:20,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:49:20,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:49:20,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:49:20,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:49:20,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:49:20,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:49:20,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:49:20,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:49:20,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:49:20,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:49:20,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:49:20,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:49:20,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:49:20,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:49:20,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:49:20,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:49:20,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:49:20,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:49:20,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:49:20,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:49:20,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:49:20,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:49:20,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:49:20,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 17 [2021-11-19 13:49:22,039 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 40 treesize of output 34 [2021-11-19 13:49:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-11-19 13:49:22,206 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:49:22,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [973982657] [2021-11-19 13:49:22,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [973982657] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:49:22,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [418767870] [2021-11-19 13:49:22,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:49:22,206 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:49:22,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:49:22,207 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:49:22,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-19 13:49:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:49:25,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 1606 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-19 13:49:25,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:49:25,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-19 13:49:26,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-19 13:49:26,271 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 22 treesize of output 14 [2021-11-19 13:49:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-11-19 13:49:34,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:49:38,962 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 40 treesize of output 34 [2021-11-19 13:49:39,120 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2021-11-19 13:49:39,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [418767870] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:49:39,120 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:49:39,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19, 16] imperfect sequences [23, 21] total 52 [2021-11-19 13:49:39,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217339665] [2021-11-19 13:49:39,121 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:49:39,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-19 13:49:39,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:49:39,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-19 13:49:39,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2477, Unknown=0, NotChecked=0, Total=2652 [2021-11-19 13:49:39,124 INFO L87 Difference]: Start difference. First operand 298 states and 400 transitions. Second operand has 28 states, 27 states have (on average 3.8518518518518516) internal successors, (104), 25 states have internal predecessors, (104), 11 states have call successors, (46), 7 states have call predecessors, (46), 8 states have return successors, (43), 11 states have call predecessors, (43), 10 states have call successors, (43) [2021-11-19 13:49:54,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:49:54,183 INFO L93 Difference]: Finished difference Result 983 states and 1422 transitions. [2021-11-19 13:49:54,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 13:49:54,185 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.8518518518518516) internal successors, (104), 25 states have internal predecessors, (104), 11 states have call successors, (46), 7 states have call predecessors, (46), 8 states have return successors, (43), 11 states have call predecessors, (43), 10 states have call successors, (43) Word has length 157 [2021-11-19 13:49:54,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:49:54,194 INFO L225 Difference]: With dead ends: 983 [2021-11-19 13:49:54,194 INFO L226 Difference]: Without dead ends: 720 [2021-11-19 13:49:54,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 518 SyntacticMatches, 57 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=235, Invalid=3305, Unknown=0, NotChecked=0, Total=3540 [2021-11-19 13:49:54,200 INFO L933 BasicCegarLoop]: 342 mSDtfsCounter, 249 mSDsluCounter, 4105 mSDsCounter, 0 mSdLazyCounter, 2637 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 4447 SdHoareTripleChecker+Invalid, 3880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 2637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1071 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:49:54,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 4447 Invalid, 3880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 2637 Invalid, 0 Unknown, 1071 Unchecked, 12.9s Time] [2021-11-19 13:49:54,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-11-19 13:49:54,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 639. [2021-11-19 13:49:54,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 382 states have (on average 1.1282722513089005) internal successors, (431), 391 states have internal predecessors, (431), 211 states have call successors, (211), 38 states have call predecessors, (211), 45 states have return successors, (281), 209 states have call predecessors, (281), 210 states have call successors, (281) [2021-11-19 13:49:54,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 923 transitions. [2021-11-19 13:49:54,301 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 923 transitions. Word has length 157 [2021-11-19 13:49:54,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:49:54,302 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 923 transitions. [2021-11-19 13:49:54,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.8518518518518516) internal successors, (104), 25 states have internal predecessors, (104), 11 states have call successors, (46), 7 states have call predecessors, (46), 8 states have return successors, (43), 11 states have call predecessors, (43), 10 states have call successors, (43) [2021-11-19 13:49:54,303 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 923 transitions. [2021-11-19 13:49:54,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-19 13:49:54,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:49:54,309 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:49:54,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 13:49:54,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-19 13:49:54,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:49:54,735 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:49:54,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:49:54,736 INFO L85 PathProgramCache]: Analyzing trace with hash 2031638418, now seen corresponding path program 1 times [2021-11-19 13:49:54,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:49:54,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969080436] [2021-11-19 13:49:54,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:49:54,738 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:49:54,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:49:54,750 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:49:54,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 13:49:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:49:56,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 1613 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-19 13:49:56,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:49:56,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-19 13:49:57,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-19 13:49:57,424 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 22 treesize of output 14 [2021-11-19 13:49:57,602 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 20 treesize of output 8 [2021-11-19 13:50:04,922 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 87 proven. 80 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-19 13:50:04,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:50:12,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:12,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:12,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:12,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:12,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:12,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:12,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:12,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:12,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:12,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:12,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:12,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:12,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:12,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:12,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:12,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:12,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:12,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:12,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:12,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:12,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:12,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:12,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:12,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:12,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:12,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:12,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:12,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:12,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 17 [2021-11-19 13:50:14,535 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 40 treesize of output 34 [2021-11-19 13:50:14,679 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-11-19 13:50:14,679 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:50:14,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969080436] [2021-11-19 13:50:14,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969080436] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:50:14,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [265206136] [2021-11-19 13:50:14,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:50:14,680 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:50:14,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:50:14,681 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:50:14,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-19 13:50:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:50:17,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 1613 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-19 13:50:17,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:50:17,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:17,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:17,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:17,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:17,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:17,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:17,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:17,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:17,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:17,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:17,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:17,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:17,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:17,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:17,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:17,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:17,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:17,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:17,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:17,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:17,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:17,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:17,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:17,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:17,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:17,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:18,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:18,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:18,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:18,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:18,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:18,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:18,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:18,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:18,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:18,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:23,224 WARN L227 SmtUtils]: Spent 5.20s on a formula simplification. DAG size of input: 553 DAG size of output: 191 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 13:50:23,228 INFO L354 Elim1Store]: treesize reduction 6140, result has 9.6 percent of original size [2021-11-19 13:50:23,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 545 treesize of output 845 [2021-11-19 13:50:40,364 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 152 proven. 10 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-19 13:50:40,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:50:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2021-11-19 13:50:43,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [265206136] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:50:43,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652052589] [2021-11-19 13:50:43,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:50:43,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:50:43,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:50:43,223 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:50:43,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-19 13:50:44,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:50:44,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 1613 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-19 13:50:44,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:50:47,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:47,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:47,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:47,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:47,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:47,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:47,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:50:47,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:50:47,265 INFO L354 Elim1Store]: treesize reduction 248, result has 18.7 percent of original size [2021-11-19 13:50:47,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 52 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 483 treesize of output 264 [2021-11-19 13:50:52,599 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 99 proven. 26 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-11-19 13:50:52,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:50:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2021-11-19 13:50:54,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652052589] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:50:54,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:50:54,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 15, 9, 16, 9] total 49 [2021-11-19 13:50:54,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113636885] [2021-11-19 13:50:54,455 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:50:54,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-19 13:50:54,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:50:54,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-19 13:50:54,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2173, Unknown=0, NotChecked=0, Total=2352 [2021-11-19 13:50:54,457 INFO L87 Difference]: Start difference. First operand 639 states and 923 transitions. Second operand has 49 states, 47 states have (on average 3.8085106382978724) internal successors, (179), 43 states have internal predecessors, (179), 17 states have call successors, (77), 11 states have call predecessors, (77), 14 states have return successors, (75), 16 states have call predecessors, (75), 15 states have call successors, (75) [2021-11-19 13:51:37,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:51:37,239 INFO L93 Difference]: Finished difference Result 1435 states and 2060 transitions. [2021-11-19 13:51:37,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-19 13:51:37,241 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 3.8085106382978724) internal successors, (179), 43 states have internal predecessors, (179), 17 states have call successors, (77), 11 states have call predecessors, (77), 14 states have return successors, (75), 16 states have call predecessors, (75), 15 states have call successors, (75) Word has length 159 [2021-11-19 13:51:37,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:51:37,250 INFO L225 Difference]: With dead ends: 1435 [2021-11-19 13:51:37,250 INFO L226 Difference]: Without dead ends: 1038 [2021-11-19 13:51:37,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1030 GetRequests, 869 SyntacticMatches, 74 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3312 ImplicationChecksByTransitivity, 38.6s TimeCoverageRelationStatistics Valid=655, Invalid=7177, Unknown=0, NotChecked=0, Total=7832 [2021-11-19 13:51:37,257 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 879 mSDsluCounter, 2266 mSDsCounter, 0 mSdLazyCounter, 5254 mSolverCounterSat, 887 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 2482 SdHoareTripleChecker+Invalid, 8283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 887 IncrementalHoareTripleChecker+Valid, 5254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2142 IncrementalHoareTripleChecker+Unchecked, 31.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:51:37,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [910 Valid, 2482 Invalid, 8283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [887 Valid, 5254 Invalid, 0 Unknown, 2142 Unchecked, 31.8s Time] [2021-11-19 13:51:37,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-11-19 13:51:37,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 852. [2021-11-19 13:51:37,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 524 states have (on average 1.1297709923664123) internal successors, (592), 535 states have internal predecessors, (592), 264 states have call successors, (264), 53 states have call predecessors, (264), 63 states have return successors, (344), 263 states have call predecessors, (344), 263 states have call successors, (344) [2021-11-19 13:51:37,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1200 transitions. [2021-11-19 13:51:37,365 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1200 transitions. Word has length 159 [2021-11-19 13:51:37,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:51:37,366 INFO L470 AbstractCegarLoop]: Abstraction has 852 states and 1200 transitions. [2021-11-19 13:51:37,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 3.8085106382978724) internal successors, (179), 43 states have internal predecessors, (179), 17 states have call successors, (77), 11 states have call predecessors, (77), 14 states have return successors, (75), 16 states have call predecessors, (75), 15 states have call successors, (75) [2021-11-19 13:51:37,366 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1200 transitions. [2021-11-19 13:51:37,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-19 13:51:37,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:51:37,372 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:51:37,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-19 13:51:37,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-19 13:51:37,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 13:51:37,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:51:37,991 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:51:37,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:51:37,991 INFO L85 PathProgramCache]: Analyzing trace with hash 579832437, now seen corresponding path program 1 times [2021-11-19 13:51:37,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:51:37,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1365730773] [2021-11-19 13:51:37,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:51:37,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:51:37,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:51:37,999 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:51:38,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 13:51:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:51:39,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 1612 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:51:39,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:51:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2021-11-19 13:51:39,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:51:39,747 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2021-11-19 13:51:39,747 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:51:39,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1365730773] [2021-11-19 13:51:39,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1365730773] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:51:39,748 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:51:39,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-19 13:51:39,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478234531] [2021-11-19 13:51:39,748 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:51:39,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:51:39,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:51:39,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:51:39,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:51:39,749 INFO L87 Difference]: Start difference. First operand 852 states and 1200 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2021-11-19 13:51:39,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:51:39,857 INFO L93 Difference]: Finished difference Result 1361 states and 1865 transitions. [2021-11-19 13:51:39,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:51:39,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) Word has length 163 [2021-11-19 13:51:39,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:51:39,868 INFO L225 Difference]: With dead ends: 1361 [2021-11-19 13:51:39,869 INFO L226 Difference]: Without dead ends: 869 [2021-11-19 13:51:39,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:51:39,872 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 0 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:51:39,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 568 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:51:39,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-11-19 13:51:39,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 863. [2021-11-19 13:51:39,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 531 states have (on average 1.128060263653484) internal successors, (599), 543 states have internal predecessors, (599), 264 states have call successors, (264), 53 states have call predecessors, (264), 67 states have return successors, (352), 266 states have call predecessors, (352), 263 states have call successors, (352) [2021-11-19 13:51:39,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1215 transitions. [2021-11-19 13:51:39,966 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1215 transitions. Word has length 163 [2021-11-19 13:51:39,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:51:39,966 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 1215 transitions. [2021-11-19 13:51:39,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2021-11-19 13:51:39,967 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1215 transitions. [2021-11-19 13:51:39,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-19 13:51:39,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:51:39,973 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:51:40,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-19 13:51:40,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:51:40,187 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:51:40,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:51:40,188 INFO L85 PathProgramCache]: Analyzing trace with hash 19216097, now seen corresponding path program 1 times [2021-11-19 13:51:40,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:51:40,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642859775] [2021-11-19 13:51:40,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:51:40,190 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:51:40,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:51:40,191 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:51:40,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c0084da-8ec0-4b3c-a56e-b161a00c1ba8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 13:51:41,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:51:41,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 1631 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-19 13:51:41,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:51:52,438 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-11-19 13:51:52,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 197 treesize of output 69 [2021-11-19 13:51:52,928 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 152 proven. 28 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-11-19 13:51:52,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:51:55,494 INFO L354 Elim1Store]: treesize reduction 1572, result has 0.1 percent of original size [2021-11-19 13:51:55,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 252 treesize of output 1 [2021-11-19 13:54:06,993 WARN L227 SmtUtils]: Spent 2.09m on a formula simplification. DAG size of input: 2066 DAG size of output: 1331 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 13:54:07,002 INFO L354 Elim1Store]: treesize reduction 2857, result has 58.3 percent of original size [2021-11-19 13:54:07,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 32 select indices, 32 select index equivalence classes, 0 disjoint index pairs (out of 496 index pairs), introduced 32 new quantified variables, introduced 496 case distinctions, treesize of input 252 treesize of output 4067