./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 624e111eb11fc6cb53be17248f0e61e18bd8cc958dfb511134351ecf4f085f78 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:18:49,252 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:18:49,254 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:18:49,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:18:49,296 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:18:49,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:18:49,299 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:18:49,302 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:18:49,304 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:18:49,306 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:18:49,307 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:18:49,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:18:49,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:18:49,311 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:18:49,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:18:49,314 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:18:49,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:18:49,317 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:18:49,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:18:49,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:18:49,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:18:49,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:18:49,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:18:49,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:18:49,333 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:18:49,334 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:18:49,334 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:18:49,335 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:18:49,336 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:18:49,337 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:18:49,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:18:49,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:18:49,340 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:18:49,341 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:18:49,343 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:18:49,343 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:18:49,344 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:18:49,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:18:49,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:18:49,347 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:18:49,348 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:18:49,354 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 23:18:49,399 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:18:49,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:18:49,405 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:18:49,406 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:18:49,406 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:18:49,406 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:18:49,406 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:18:49,407 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:18:49,407 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:18:49,407 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:18:49,408 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:18:49,409 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:18:49,409 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:18:49,409 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:18:49,409 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:18:49,410 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:18:49,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:18:49,411 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:18:49,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:18:49,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:18:49,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:18:49,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:18:49,412 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:18:49,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:18:49,417 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:18:49,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:18:49,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:18:49,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:18:49,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:18:49,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:18:49,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:18:49,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:18:49,419 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:18:49,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:18:49,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:18:49,419 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:18:49,420 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:18:49,420 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_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 624e111eb11fc6cb53be17248f0e61e18bd8cc958dfb511134351ecf4f085f78 [2021-11-12 23:18:49,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:18:49,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:18:49,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:18:49,783 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:18:49,784 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:18:49,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i [2021-11-12 23:18:49,892 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/data/6eaf2989e/da391be615494727ab433fe76fb2d3ad/FLAG5c507cb02 [2021-11-12 23:18:50,875 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:18:50,877 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i [2021-11-12 23:18:50,938 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/data/6eaf2989e/da391be615494727ab433fe76fb2d3ad/FLAG5c507cb02 [2021-11-12 23:18:51,317 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/data/6eaf2989e/da391be615494727ab433fe76fb2d3ad [2021-11-12 23:18:51,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:18:51,321 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:18:51,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:18:51,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:18:51,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:18:51,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:18:51" (1/1) ... [2021-11-12 23:18:51,329 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d462dd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:51, skipping insertion in model container [2021-11-12 23:18:51,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:18:51" (1/1) ... [2021-11-12 23:18:51,337 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:18:51,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:18:51,762 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i[4495,4508] [2021-11-12 23:18:51,770 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i[4555,4568] [2021-11-12 23:18:51,797 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 23:18:51,804 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 23:18:52,973 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:18:52,974 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:18:52,975 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:18:52,976 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:18:52,978 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:18:53,001 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:18:53,003 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:18:53,008 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:18:53,010 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:18:53,601 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 23:18:53,603 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 23:18:53,604 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 23:18:53,606 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 23:18:53,608 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 23:18:53,609 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 23:18:53,610 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 23:18:53,611 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 23:18:53,612 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 23:18:53,613 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 23:18:53,867 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 23:18:54,024 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:18:54,025 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:18:54,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:18:54,170 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 23:18:54,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4562df1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:54, skipping insertion in model container [2021-11-12 23:18:54,171 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:18:54,171 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:18:54,173 INFO L158 Benchmark]: Toolchain (without parser) took 2850.96ms. Allocated memory is still 102.8MB. Free memory was 56.8MB in the beginning and 49.6MB in the end (delta: 7.3MB). Peak memory consumption was 22.0MB. Max. memory is 16.1GB. [2021-11-12 23:18:54,174 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 102.8MB. Free memory is still 83.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:18:54,175 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2848.01ms. Allocated memory is still 102.8MB. Free memory was 56.6MB in the beginning and 49.6MB in the end (delta: 7.0MB). Peak memory consumption was 22.0MB. Max. memory is 16.1GB. [2021-11-12 23:18:54,176 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 102.8MB. Free memory is still 83.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2848.01ms. Allocated memory is still 102.8MB. Free memory was 56.6MB in the beginning and 49.6MB in the end (delta: 7.0MB). Peak memory consumption was 22.0MB. 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_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 624e111eb11fc6cb53be17248f0e61e18bd8cc958dfb511134351ecf4f085f78 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:18:56,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:18:56,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:18:56,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:18:56,872 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:18:56,874 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:18:56,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:18:56,879 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:18:56,882 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:18:56,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:18:56,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:18:56,887 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:18:56,888 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:18:56,890 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:18:56,892 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:18:56,894 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:18:56,895 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:18:56,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:18:56,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:18:56,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:18:56,905 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:18:56,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:18:56,909 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:18:56,910 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:18:56,915 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:18:56,916 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:18:56,917 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:18:56,918 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:18:56,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:18:56,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:18:56,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:18:56,923 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:18:56,924 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:18:56,925 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:18:56,927 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:18:56,927 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:18:56,929 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:18:56,929 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:18:56,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:18:56,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:18:56,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:18:56,937 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 23:18:56,970 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:18:56,971 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:18:56,972 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:18:56,972 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:18:56,972 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:18:56,973 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:18:56,973 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:18:56,973 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:18:56,974 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:18:56,974 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:18:56,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:18:56,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:18:56,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:18:56,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:18:56,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:18:56,977 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:18:56,977 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:18:56,977 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:18:56,978 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:18:56,978 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:18:56,978 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:18:56,978 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:18:56,979 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:18:56,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:18:56,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:18:56,980 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:18:56,980 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:18:56,980 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:18:56,980 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:18:56,981 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:18:56,981 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:18:56,981 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:18:56,982 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:18:56,982 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_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 624e111eb11fc6cb53be17248f0e61e18bd8cc958dfb511134351ecf4f085f78 [2021-11-12 23:18:57,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:18:57,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:18:57,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:18:57,488 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:18:57,489 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:18:57,491 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i [2021-11-12 23:18:57,579 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/data/91796ee0e/842e35c2ff64497da8d10c61b31834dd/FLAGcafcf7da9 [2021-11-12 23:18:58,747 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:18:58,747 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i [2021-11-12 23:18:58,807 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/data/91796ee0e/842e35c2ff64497da8d10c61b31834dd/FLAGcafcf7da9 [2021-11-12 23:18:59,089 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/data/91796ee0e/842e35c2ff64497da8d10c61b31834dd [2021-11-12 23:18:59,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:18:59,094 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:18:59,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:18:59,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:18:59,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:18:59,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:18:59" (1/1) ... [2021-11-12 23:18:59,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@107eddbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:59, skipping insertion in model container [2021-11-12 23:18:59,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:18:59" (1/1) ... [2021-11-12 23:18:59,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:18:59,252 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:18:59,662 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i[4495,4508] [2021-11-12 23:18:59,671 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i[4555,4568] [2021-11-12 23:18:59,700 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 23:18:59,709 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 23:19:00,854 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:00,855 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:00,856 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:00,857 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:00,858 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:00,878 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:00,879 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:00,881 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:00,882 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:01,441 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 23:19:01,442 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 23:19:01,444 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 23:19:01,445 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 23:19:01,447 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 23:19:01,448 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 23:19:01,448 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 23:19:01,449 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 23:19:01,450 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 23:19:01,451 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 23:19:01,686 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 23:19:01,843 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:01,844 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:01,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:19:02,048 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:19:02,181 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:19:02,188 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i[4495,4508] [2021-11-12 23:19:02,189 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i[4555,4568] [2021-11-12 23:19:02,193 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 23:19:02,196 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 23:19:02,256 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:02,257 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:02,257 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:02,258 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:02,259 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:02,279 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:02,286 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:02,288 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:02,289 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:02,366 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 23:19:02,367 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 23:19:02,368 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 23:19:02,370 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 23:19:02,377 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 23:19:02,378 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 23:19:02,379 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 23:19:02,379 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 23:19:02,380 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 23:19:02,388 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 23:19:02,417 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 23:19:02,510 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:02,511 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:02,550 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:19:02,629 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:19:02,660 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i[4495,4508] [2021-11-12 23:19:02,661 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i[4555,4568] [2021-11-12 23:19:02,662 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 23:19:02,664 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 23:19:02,711 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:02,712 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:02,712 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:02,713 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:02,714 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:02,724 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:02,724 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:02,725 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:02,726 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:02,768 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 23:19:02,769 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 23:19:02,770 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 23:19:02,771 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 23:19:02,772 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 23:19:02,772 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 23:19:02,773 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 23:19:02,792 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 23:19:02,793 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 23:19:02,794 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 23:19:02,826 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 23:19:02,915 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:02,916 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:02,955 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:19:03,307 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:19:03,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:03 WrapperNode [2021-11-12 23:19:03,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:19:03,309 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:19:03,310 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:19:03,310 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:19:03,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:03" (1/1) ... [2021-11-12 23:19:03,605 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:03" (1/1) ... [2021-11-12 23:19:03,769 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:19:03,770 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:19:03,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:19:03,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:19:03,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:03" (1/1) ... [2021-11-12 23:19:03,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:03" (1/1) ... [2021-11-12 23:19:03,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:03" (1/1) ... [2021-11-12 23:19:03,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:03" (1/1) ... [2021-11-12 23:19:03,923 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:03" (1/1) ... [2021-11-12 23:19:03,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:03" (1/1) ... [2021-11-12 23:19:03,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:03" (1/1) ... [2021-11-12 23:19:03,997 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:19:03,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:19:03,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:19:03,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:19:04,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:03" (1/1) ... [2021-11-12 23:19:04,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:19:04,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:19:04,037 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:19:04,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:19:04,099 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-12 23:19:04,099 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-12 23:19:04,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:19:04,100 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-12 23:19:04,100 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-12 23:19:04,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:19:04,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 23:19:04,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 23:19:04,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 23:19:04,103 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 23:19:04,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:19:04,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:19:04,103 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2021-11-12 23:19:04,103 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2021-11-12 23:19:04,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:19:04,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:19:04,104 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-12 23:19:04,104 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-12 23:19:04,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 23:19:04,105 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-12 23:19:04,105 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-12 23:19:04,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 23:19:04,105 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 23:19:04,105 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 23:19:04,106 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2021-11-12 23:19:04,106 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2021-11-12 23:19:04,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:19:04,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:19:04,107 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_write [2021-11-12 23:19:04,107 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_write [2021-11-12 23:19:04,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 23:19:04,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 23:19:04,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 23:19:04,108 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-12 23:19:04,108 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-12 23:19:19,554 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:19:19,555 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:19:19,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:19:19 BoogieIcfgContainer [2021-11-12 23:19:19,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:19:19,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:19:19,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:19:19,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:19:19,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:18:59" (1/3) ... [2021-11-12 23:19:19,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@529a1593 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:19:19, skipping insertion in model container [2021-11-12 23:19:19,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:03" (2/3) ... [2021-11-12 23:19:19,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@529a1593 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:19:19, skipping insertion in model container [2021-11-12 23:19:19,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:19:19" (3/3) ... [2021-11-12 23:19:19,567 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_write_u8_harness.i [2021-11-12 23:19:19,573 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:19:19,573 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:19:19,624 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:19:19,630 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:19:19,630 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:19:19,651 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 86 states have internal predecessors, (105), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-12 23:19:19,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-12 23:19:19,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:19,663 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:19,663 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:19,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:19,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1647877052, now seen corresponding path program 1 times [2021-11-12 23:19:19,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:19:19,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [233373151] [2021-11-12 23:19:19,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:19,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:19:19,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:19:19,695 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:19:19,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:19:23,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:24,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 1869 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:19:24,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-12 23:19:24,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-12 23:19:24,867 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:19:24,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [233373151] [2021-11-12 23:19:24,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [233373151] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:19:24,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:19:24,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-12 23:19:24,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864904071] [2021-11-12 23:19:24,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:19:24,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:19:24,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:19:24,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:19:24,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:19:24,918 INFO L87 Difference]: Start difference. First operand has 131 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 86 states have internal predecessors, (105), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:19:24,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:24,988 INFO L93 Difference]: Finished difference Result 258 states and 367 transitions. [2021-11-12 23:19:24,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:19:24,992 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 85 [2021-11-12 23:19:24,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:25,006 INFO L225 Difference]: With dead ends: 258 [2021-11-12 23:19:25,006 INFO L226 Difference]: Without dead ends: 126 [2021-11-12 23:19:25,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:19:25,022 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.39ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:25,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 5.39ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:19:25,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-12 23:19:25,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-11-12 23:19:25,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 81 states have (on average 1.2098765432098766) internal successors, (98), 82 states have internal predecessors, (98), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-11-12 23:19:25,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 165 transitions. [2021-11-12 23:19:25,101 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 165 transitions. Word has length 85 [2021-11-12 23:19:25,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:25,102 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 165 transitions. [2021-11-12 23:19:25,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:19:25,104 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 165 transitions. [2021-11-12 23:19:25,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-12 23:19:25,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:25,117 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:25,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-12 23:19:25,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:19:25,319 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:25,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:25,320 INFO L85 PathProgramCache]: Analyzing trace with hash -905040328, now seen corresponding path program 1 times [2021-11-12 23:19:25,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:19:25,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986950914] [2021-11-12 23:19:25,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:25,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:19:25,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:19:25,329 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:19:25,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:19:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:29,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 1869 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:19:29,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:30,182 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 23:19:30,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-12 23:19:30,746 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:19:30,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986950914] [2021-11-12 23:19:30,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [986950914] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:19:30,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:19:30,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-12 23:19:30,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668029182] [2021-11-12 23:19:30,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:19:30,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:19:30,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:19:30,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:19:30,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:19:30,750 INFO L87 Difference]: Start difference. First operand 126 states and 165 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-12 23:19:31,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:31,122 INFO L93 Difference]: Finished difference Result 230 states and 309 transitions. [2021-11-12 23:19:31,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:19:31,123 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 85 [2021-11-12 23:19:31,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:31,127 INFO L225 Difference]: With dead ends: 230 [2021-11-12 23:19:31,127 INFO L226 Difference]: Without dead ends: 129 [2021-11-12 23:19:31,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:19:31,129 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 47 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 301.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.53ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 334.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:31,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 531 Invalid, 57 Unknown, 0 Unchecked, 7.53ms Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 334.84ms Time] [2021-11-12 23:19:31,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-12 23:19:31,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-11-12 23:19:31,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 83 states have (on average 1.2048192771084338) internal successors, (100), 85 states have internal predecessors, (100), 34 states have call successors, (34), 10 states have call predecessors, (34), 11 states have return successors, (37), 33 states have call predecessors, (37), 33 states have call successors, (37) [2021-11-12 23:19:31,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 171 transitions. [2021-11-12 23:19:31,147 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 171 transitions. Word has length 85 [2021-11-12 23:19:31,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:31,148 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 171 transitions. [2021-11-12 23:19:31,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-12 23:19:31,148 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 171 transitions. [2021-11-12 23:19:31,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-12 23:19:31,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:31,150 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:31,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:19:31,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:19:31,377 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:31,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:31,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1139705187, now seen corresponding path program 1 times [2021-11-12 23:19:31,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:19:31,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409136357] [2021-11-12 23:19:31,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:31,392 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:19:31,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:19:31,394 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:19:31,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:19:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:36,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 1882 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:19:36,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:36,413 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 [2021-11-12 23:19:37,735 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 23:19:37,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:38,898 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 [2021-11-12 23:19:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-12 23:19:39,290 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:19:39,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409136357] [2021-11-12 23:19:39,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409136357] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:19:39,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:19:39,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [10] total 19 [2021-11-12 23:19:39,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227006071] [2021-11-12 23:19:39,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:19:39,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:19:39,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:19:39,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:19:39,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:19:39,294 INFO L87 Difference]: Start difference. First operand 129 states and 171 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 10 states have internal predecessors, (45), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-12 23:19:41,616 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:42,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:42,243 INFO L93 Difference]: Finished difference Result 253 states and 337 transitions. [2021-11-12 23:19:42,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:19:42,244 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 10 states have internal predecessors, (45), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 91 [2021-11-12 23:19:42,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:42,247 INFO L225 Difference]: With dead ends: 253 [2021-11-12 23:19:42,247 INFO L226 Difference]: Without dead ends: 142 [2021-11-12 23:19:42,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:19:42,249 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 37 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2661.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.68ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 2780.78ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:42,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 765 Invalid, 85 Unknown, 0 Unchecked, 9.68ms Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 1 Unknown, 36 Unchecked, 2780.78ms Time] [2021-11-12 23:19:42,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-12 23:19:42,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-12 23:19:42,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 97 states have internal predecessors, (115), 34 states have call successors, (34), 11 states have call predecessors, (34), 12 states have return successors, (38), 33 states have call predecessors, (38), 33 states have call successors, (38) [2021-11-12 23:19:42,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 187 transitions. [2021-11-12 23:19:42,266 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 187 transitions. Word has length 91 [2021-11-12 23:19:42,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:42,267 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 187 transitions. [2021-11-12 23:19:42,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 10 states have internal predecessors, (45), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-12 23:19:42,267 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 187 transitions. [2021-11-12 23:19:42,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-12 23:19:42,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:42,269 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:42,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:19:42,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:19:42,470 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:42,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:42,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1700404965, now seen corresponding path program 1 times [2021-11-12 23:19:42,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:19:42,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1046169740] [2021-11-12 23:19:42,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:42,475 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:19:42,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:19:42,477 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:19:42,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:19:46,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:46,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 1879 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:19:46,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-12 23:19:47,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:47,417 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-12 23:19:47,417 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:19:47,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1046169740] [2021-11-12 23:19:47,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1046169740] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:19:47,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:19:47,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-12 23:19:47,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565358061] [2021-11-12 23:19:47,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:19:47,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:19:47,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:19:47,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:19:47,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:19:47,420 INFO L87 Difference]: Start difference. First operand 142 states and 187 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:19:47,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:47,513 INFO L93 Difference]: Finished difference Result 256 states and 349 transitions. [2021-11-12 23:19:47,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:19:47,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 91 [2021-11-12 23:19:47,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:47,523 INFO L225 Difference]: With dead ends: 256 [2021-11-12 23:19:47,523 INFO L226 Difference]: Without dead ends: 148 [2021-11-12 23:19:47,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:19:47,527 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 20 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.27ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.57ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:47,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 487 Invalid, 16 Unknown, 0 Unchecked, 3.27ms Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 52.57ms Time] [2021-11-12 23:19:47,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-12 23:19:47,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 136. [2021-11-12 23:19:47,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 90 states have (on average 1.211111111111111) internal successors, (109), 91 states have internal predecessors, (109), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (37), 33 states have call predecessors, (37), 33 states have call successors, (37) [2021-11-12 23:19:47,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 180 transitions. [2021-11-12 23:19:47,551 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 180 transitions. Word has length 91 [2021-11-12 23:19:47,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:47,552 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 180 transitions. [2021-11-12 23:19:47,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:19:47,552 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 180 transitions. [2021-11-12 23:19:47,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-12 23:19:47,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:47,554 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:47,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:19:47,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:19:47,777 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:47,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:47,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1417979029, now seen corresponding path program 1 times [2021-11-12 23:19:47,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:19:47,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1118348201] [2021-11-12 23:19:47,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:47,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:19:47,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:19:47,781 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:19:47,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:19:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:52,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 1891 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:19:52,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:53,067 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-12 23:19:53,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:53,707 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-12 23:19:53,707 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:19:53,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1118348201] [2021-11-12 23:19:53,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1118348201] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:19:53,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:19:53,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-11-12 23:19:53,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038251130] [2021-11-12 23:19:53,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:19:53,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:19:53,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:19:53,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:19:53,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:19:53,711 INFO L87 Difference]: Start difference. First operand 136 states and 180 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:19:55,970 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:57,983 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:59,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:59,312 INFO L93 Difference]: Finished difference Result 262 states and 362 transitions. [2021-11-12 23:19:59,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:19:59,316 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 95 [2021-11-12 23:19:59,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:59,318 INFO L225 Difference]: With dead ends: 262 [2021-11-12 23:19:59,318 INFO L226 Difference]: Without dead ends: 156 [2021-11-12 23:19:59,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:19:59,320 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 42 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5212.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.52ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 5428.37ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:59,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 575 Invalid, 123 Unknown, 0 Unchecked, 5.52ms Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 2 Unknown, 39 Unchecked, 5428.37ms Time] [2021-11-12 23:19:59,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-12 23:19:59,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 145. [2021-11-12 23:19:59,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 99 states have (on average 1.2222222222222223) internal successors, (121), 100 states have internal predecessors, (121), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (37), 33 states have call predecessors, (37), 33 states have call successors, (37) [2021-11-12 23:19:59,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 192 transitions. [2021-11-12 23:19:59,338 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 192 transitions. Word has length 95 [2021-11-12 23:19:59,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:59,338 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 192 transitions. [2021-11-12 23:19:59,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:19:59,339 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 192 transitions. [2021-11-12 23:19:59,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-12 23:19:59,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:59,340 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:59,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:19:59,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:19:59,553 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:59,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:59,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1216155095, now seen corresponding path program 1 times [2021-11-12 23:19:59,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:19:59,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [309125657] [2021-11-12 23:19:59,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:59,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:19:59,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:19:59,558 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:19:59,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:20:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:03,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 1888 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 23:20:03,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:20:05,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-12 23:20:08,080 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:20:08,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [309125657] [2021-11-12 23:20:08,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [309125657] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:20:08,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:20:08,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 19 [2021-11-12 23:20:08,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973561823] [2021-11-12 23:20:08,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:08,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:20:08,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:20:08,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:20:08,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:20:08,083 INFO L87 Difference]: Start difference. First operand 145 states and 192 transitions. Second operand has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-12 23:20:10,311 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:20:12,326 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:20:16,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:16,004 INFO L93 Difference]: Finished difference Result 270 states and 375 transitions. [2021-11-12 23:20:16,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:20:16,007 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 95 [2021-11-12 23:20:16,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:16,009 INFO L225 Difference]: With dead ends: 270 [2021-11-12 23:20:16,009 INFO L226 Difference]: Without dead ends: 154 [2021-11-12 23:20:16,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:20:16,011 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 38 mSDsluCounter, 1313 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5911.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.94ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 294 IncrementalHoareTripleChecker+Unchecked, 6196.27ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:16,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 1472 Invalid, 528 Unknown, 0 Unchecked, 8.94ms Time], IncrementalHoareTripleChecker [2 Valid, 230 Invalid, 2 Unknown, 294 Unchecked, 6196.27ms Time] [2021-11-12 23:20:16,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-12 23:20:16,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2021-11-12 23:20:16,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 103 states have (on average 1.1941747572815533) internal successors, (123), 105 states have internal predecessors, (123), 34 states have call successors, (34), 11 states have call predecessors, (34), 12 states have return successors, (42), 33 states have call predecessors, (42), 33 states have call successors, (42) [2021-11-12 23:20:16,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 199 transitions. [2021-11-12 23:20:16,026 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 199 transitions. Word has length 95 [2021-11-12 23:20:16,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:16,027 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 199 transitions. [2021-11-12 23:20:16,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-12 23:20:16,027 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 199 transitions. [2021-11-12 23:20:16,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-12 23:20:16,029 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:16,029 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:16,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-12 23:20:16,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:20:16,245 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:16,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:16,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1190808429, now seen corresponding path program 1 times [2021-11-12 23:20:16,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:20:16,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191397441] [2021-11-12 23:20:16,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:16,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:20:16,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:20:16,249 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:20:16,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:20:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:20,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 1889 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:20:20,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-12 23:20:20,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-12 23:20:20,609 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:20:20,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [191397441] [2021-11-12 23:20:20,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [191397441] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:20:20,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:20:20,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-12 23:20:20,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511522693] [2021-11-12 23:20:20,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:20,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:20:20,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:20:20,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:20:20,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:20:20,612 INFO L87 Difference]: Start difference. First operand 150 states and 199 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:20:20,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:20,708 INFO L93 Difference]: Finished difference Result 274 states and 373 transitions. [2021-11-12 23:20:20,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:20:20,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 95 [2021-11-12 23:20:20,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:20,711 INFO L225 Difference]: With dead ends: 274 [2021-11-12 23:20:20,711 INFO L226 Difference]: Without dead ends: 154 [2021-11-12 23:20:20,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:20:20,713 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 34 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.70ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 63.30ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:20,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 478 Invalid, 13 Unknown, 0 Unchecked, 1.70ms Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 63.30ms Time] [2021-11-12 23:20:20,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-12 23:20:20,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 146. [2021-11-12 23:20:20,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 99 states have (on average 1.1717171717171717) internal successors, (116), 101 states have internal predecessors, (116), 34 states have call successors, (34), 11 states have call predecessors, (34), 12 states have return successors, (42), 33 states have call predecessors, (42), 33 states have call successors, (42) [2021-11-12 23:20:20,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 192 transitions. [2021-11-12 23:20:20,727 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 192 transitions. Word has length 95 [2021-11-12 23:20:20,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:20,728 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 192 transitions. [2021-11-12 23:20:20,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:20:20,728 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 192 transitions. [2021-11-12 23:20:20,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-12 23:20:20,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:20,730 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:20,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:20:20,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:20:20,944 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:20,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:20,944 INFO L85 PathProgramCache]: Analyzing trace with hash 773411823, now seen corresponding path program 1 times [2021-11-12 23:20:20,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:20:20,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [220973934] [2021-11-12 23:20:20,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:20,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:20:20,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:20:20,948 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:20:20,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:20:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:24,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 1886 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:20:24,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:25,399 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:20:25,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:25,894 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-12 23:20:25,895 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:20:25,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [220973934] [2021-11-12 23:20:25,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [220973934] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:20:25,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:20:25,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-11-12 23:20:25,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786592451] [2021-11-12 23:20:25,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:25,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:20:25,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:20:25,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:20:25,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:20:25,897 INFO L87 Difference]: Start difference. First operand 146 states and 192 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-12 23:20:26,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:26,456 INFO L93 Difference]: Finished difference Result 273 states and 370 transitions. [2021-11-12 23:20:26,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:20:26,466 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 95 [2021-11-12 23:20:26,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:26,469 INFO L225 Difference]: With dead ends: 273 [2021-11-12 23:20:26,469 INFO L226 Difference]: Without dead ends: 155 [2021-11-12 23:20:26,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:20:26,471 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 12 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 418.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.89ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 459.18ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:26,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1173 Invalid, 142 Unknown, 0 Unchecked, 4.89ms Time], IncrementalHoareTripleChecker [3 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 459.18ms Time] [2021-11-12 23:20:26,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-12 23:20:26,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 146. [2021-11-12 23:20:26,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 99 states have (on average 1.1717171717171717) internal successors, (116), 101 states have internal predecessors, (116), 34 states have call successors, (34), 11 states have call predecessors, (34), 12 states have return successors, (42), 33 states have call predecessors, (42), 33 states have call successors, (42) [2021-11-12 23:20:26,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 192 transitions. [2021-11-12 23:20:26,486 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 192 transitions. Word has length 95 [2021-11-12 23:20:26,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:26,487 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 192 transitions. [2021-11-12 23:20:26,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-12 23:20:26,487 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 192 transitions. [2021-11-12 23:20:26,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-12 23:20:26,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:26,489 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:26,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-12 23:20:26,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:20:26,705 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:26,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:26,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1204437332, now seen corresponding path program 1 times [2021-11-12 23:20:26,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:20:26,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46858063] [2021-11-12 23:20:26,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:26,709 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:20:26,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:20:26,709 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:20:26,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:20:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:30,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 1890 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:20:30,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:31,117 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:20:31,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:31,610 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-12 23:20:31,610 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:20:31,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46858063] [2021-11-12 23:20:31,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46858063] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:20:31,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:20:31,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-12 23:20:31,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484563271] [2021-11-12 23:20:31,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:31,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:20:31,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:20:31,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:20:31,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:20:31,612 INFO L87 Difference]: Start difference. First operand 146 states and 192 transitions. Second operand has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-12 23:20:31,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:31,974 INFO L93 Difference]: Finished difference Result 256 states and 338 transitions. [2021-11-12 23:20:31,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:20:31,975 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 97 [2021-11-12 23:20:31,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:31,977 INFO L225 Difference]: With dead ends: 256 [2021-11-12 23:20:31,977 INFO L226 Difference]: Without dead ends: 146 [2021-11-12 23:20:31,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:20:31,979 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 63 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 282.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.83ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 316.33ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:31,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 538 Invalid, 68 Unknown, 0 Unchecked, 2.83ms Time], IncrementalHoareTripleChecker [24 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 316.33ms Time] [2021-11-12 23:20:31,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-12 23:20:31,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-11-12 23:20:31,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 99 states have (on average 1.1717171717171717) internal successors, (116), 101 states have internal predecessors, (116), 34 states have call successors, (34), 11 states have call predecessors, (34), 12 states have return successors, (41), 33 states have call predecessors, (41), 33 states have call successors, (41) [2021-11-12 23:20:31,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 191 transitions. [2021-11-12 23:20:31,991 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 191 transitions. Word has length 97 [2021-11-12 23:20:31,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:31,992 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 191 transitions. [2021-11-12 23:20:31,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-12 23:20:31,992 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 191 transitions. [2021-11-12 23:20:31,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-12 23:20:31,994 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:31,994 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-12 23:20:32,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:20:32,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:20:32,209 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:32,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:32,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1526953473, now seen corresponding path program 1 times [2021-11-12 23:20:32,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:20:32,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964732572] [2021-11-12 23:20:32,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:32,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:20:32,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:20:32,214 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:20:32,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:20:36,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:36,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 1903 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:20:36,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 23:20:36,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:37,257 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 23:20:37,257 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:20:37,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [964732572] [2021-11-12 23:20:37,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [964732572] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:20:37,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:20:37,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 8 [2021-11-12 23:20:37,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527081312] [2021-11-12 23:20:37,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:37,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:20:37,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:20:37,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:20:37,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:20:37,260 INFO L87 Difference]: Start difference. First operand 146 states and 191 transitions. Second operand has 8 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-12 23:20:37,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:37,941 INFO L93 Difference]: Finished difference Result 251 states and 328 transitions. [2021-11-12 23:20:37,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:20:37,942 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 103 [2021-11-12 23:20:37,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:37,944 INFO L225 Difference]: With dead ends: 251 [2021-11-12 23:20:37,944 INFO L226 Difference]: Without dead ends: 143 [2021-11-12 23:20:37,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:20:37,945 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 83 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 516.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.65ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 582.43ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:37,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 803 Invalid, 114 Unknown, 0 Unchecked, 3.65ms Time], IncrementalHoareTripleChecker [40 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 582.43ms Time] [2021-11-12 23:20:37,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-12 23:20:37,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-11-12 23:20:37,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 98 states have internal predecessors, (113), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (38), 33 states have call predecessors, (38), 33 states have call successors, (38) [2021-11-12 23:20:37,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 185 transitions. [2021-11-12 23:20:37,959 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 185 transitions. Word has length 103 [2021-11-12 23:20:37,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:37,960 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 185 transitions. [2021-11-12 23:20:37,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-12 23:20:37,961 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 185 transitions. [2021-11-12 23:20:37,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-12 23:20:37,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:37,963 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:38,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:20:38,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:20:38,172 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:38,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:38,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1699333333, now seen corresponding path program 1 times [2021-11-12 23:20:38,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:20:38,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2080332115] [2021-11-12 23:20:38,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:38,176 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:20:38,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:20:38,177 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:20:38,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:20:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:42,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 1929 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:20:42,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:45,815 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:45,816 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 155 treesize of output 59 [2021-11-12 23:20:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 91 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:20:46,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:47,188 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-11-12 23:20:47,188 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 129 treesize of output 1 [2021-11-12 23:20:56,797 WARN L227 SmtUtils]: Spent 9.09s on a formula simplification. DAG size of input: 523 DAG size of output: 169 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-12 23:20:56,799 INFO L354 Elim1Store]: treesize reduction 1138, result has 27.7 percent of original size [2021-11-12 23:20:56,799 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 129 treesize of output 471 [2021-11-12 23:25:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-12 23:25:04,193 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:04,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2080332115] [2021-11-12 23:25:04,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2080332115] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:04,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1393075396] [2021-11-12 23:25:04,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:04,193 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:25:04,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:25:04,196 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:25:04,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-12 23:25:13,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:13,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 1929 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:25:13,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:15,327 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-12 23:25:15,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:16,459 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 23:25:16,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1393075396] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:25:16,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:25:16,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13, 10, 10] total 32 [2021-11-12 23:25:16,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20311738] [2021-11-12 23:25:16,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:16,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:25:16,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:16,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:25:16,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=912, Unknown=0, NotChecked=0, Total=992 [2021-11-12 23:25:16,462 INFO L87 Difference]: Start difference. First operand 143 states and 185 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-12 23:25:16,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:16,961 INFO L93 Difference]: Finished difference Result 155 states and 201 transitions. [2021-11-12 23:25:16,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:25:16,962 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 115 [2021-11-12 23:25:16,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:16,964 INFO L225 Difference]: With dead ends: 155 [2021-11-12 23:25:16,964 INFO L226 Difference]: Without dead ends: 153 [2021-11-12 23:25:16,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 419 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=88, Invalid=1034, Unknown=0, NotChecked=0, Total=1122 [2021-11-12 23:25:16,965 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 23 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 167.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.54ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 182.09ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:16,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 1099 Invalid, 54 Unknown, 0 Unchecked, 3.54ms Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 182.09ms Time] [2021-11-12 23:25:16,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-12 23:25:16,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2021-11-12 23:25:16,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 103 states have (on average 1.1553398058252426) internal successors, (119), 105 states have internal predecessors, (119), 35 states have call successors, (35), 12 states have call predecessors, (35), 13 states have return successors, (44), 34 states have call predecessors, (44), 34 states have call successors, (44) [2021-11-12 23:25:16,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 198 transitions. [2021-11-12 23:25:16,978 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 198 transitions. Word has length 115 [2021-11-12 23:25:16,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:16,978 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 198 transitions. [2021-11-12 23:25:16,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-12 23:25:16,979 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 198 transitions. [2021-11-12 23:25:16,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-12 23:25:16,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:16,981 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-12 23:25:17,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:17,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:17,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:25:17,397 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:25:17,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:17,397 INFO L85 PathProgramCache]: Analyzing trace with hash 591826459, now seen corresponding path program 1 times [2021-11-12 23:25:17,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:17,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1946185253] [2021-11-12 23:25:17,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:17,401 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:17,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:17,403 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:17,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:25:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:21,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 1935 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:25:21,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:24,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:24,786 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 155 treesize of output 59 [2021-11-12 23:25:24,964 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 95 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:25:24,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:26,111 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-11-12 23:25:26,112 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 129 treesize of output 1 [2021-11-12 23:25:35,821 WARN L227 SmtUtils]: Spent 9.20s on a formula simplification. DAG size of input: 523 DAG size of output: 169 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-12 23:25:35,844 INFO L354 Elim1Store]: treesize reduction 1138, result has 27.7 percent of original size [2021-11-12 23:25:35,847 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 129 treesize of output 471 [2021-11-12 23:29:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 23:29:24,268 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:24,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1946185253] [2021-11-12 23:29:24,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1946185253] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:29:24,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1725063842] [2021-11-12 23:29:24,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:24,268 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:29:24,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:29:24,270 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:29:24,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 23:29:33,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:33,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 1935 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-12 23:29:33,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:40,369 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 90 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:29:40,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:46,304 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:29:46,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2021-11-12 23:29:46,343 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-12 23:29:46,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-11-12 23:29:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 34 proven. 20 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-12 23:29:46,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1725063842] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:29:46,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614147131] [2021-11-12 23:29:46,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:46,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:29:46,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:29:46,500 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:29:46,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-12 23:29:48,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:48,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 1935 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-12 23:29:48,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:52,085 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 90 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:29:52,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:55,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:29:55,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2021-11-12 23:29:55,660 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-12 23:29:55,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-11-12 23:29:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 34 proven. 20 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-12 23:29:55,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614147131] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:29:55,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:29:55,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 16, 13, 16, 13] total 40 [2021-11-12 23:29:55,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396836936] [2021-11-12 23:29:55,847 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:29:55,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-12 23:29:55,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:55,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-12 23:29:55,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1434, Unknown=0, NotChecked=0, Total=1560 [2021-11-12 23:29:55,849 INFO L87 Difference]: Start difference. First operand 152 states and 198 transitions. Second operand has 40 states, 39 states have (on average 4.461538461538462) internal successors, (174), 36 states have internal predecessors, (174), 12 states have call successors, (38), 8 states have call predecessors, (38), 9 states have return successors, (35), 11 states have call predecessors, (35), 12 states have call successors, (35) [2021-11-12 23:29:58,115 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:00,131 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:02,139 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:04,156 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:06,168 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:08,175 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:10,183 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:12,197 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:14,206 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:16,220 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:18,232 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:25,094 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:31:03,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:03,716 INFO L93 Difference]: Finished difference Result 445 states and 613 transitions. [2021-11-12 23:31:03,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-12 23:31:03,716 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 4.461538461538462) internal successors, (174), 36 states have internal predecessors, (174), 12 states have call successors, (38), 8 states have call predecessors, (38), 9 states have return successors, (35), 11 states have call predecessors, (35), 12 states have call successors, (35) Word has length 119 [2021-11-12 23:31:03,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:03,720 INFO L225 Difference]: With dead ends: 445 [2021-11-12 23:31:03,720 INFO L226 Difference]: Without dead ends: 339 [2021-11-12 23:31:03,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 651 SyntacticMatches, 26 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 45.0s TimeCoverageRelationStatistics Valid=1148, Invalid=11508, Unknown=0, NotChecked=0, Total=12656 [2021-11-12 23:31:03,727 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 264 mSDsluCounter, 4453 mSDsCounter, 0 mSdLazyCounter, 1783 mSolverCounterSat, 108 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34469.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 4689 SdHoareTripleChecker+Invalid, 2562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.86ms SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1783 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 659 IncrementalHoareTripleChecker+Unchecked, 35755.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:03,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 4689 Invalid, 2562 Unknown, 0 Unchecked, 31.86ms Time], IncrementalHoareTripleChecker [108 Valid, 1783 Invalid, 12 Unknown, 659 Unchecked, 35755.84ms Time] [2021-11-12 23:31:03,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-11-12 23:31:03,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 272. [2021-11-12 23:31:03,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 186 states have (on average 1.1666666666666667) internal successors, (217), 190 states have internal predecessors, (217), 61 states have call successors, (61), 20 states have call predecessors, (61), 24 states have return successors, (96), 61 states have call predecessors, (96), 60 states have call successors, (96) [2021-11-12 23:31:03,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 374 transitions. [2021-11-12 23:31:03,756 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 374 transitions. Word has length 119 [2021-11-12 23:31:03,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:03,756 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 374 transitions. [2021-11-12 23:31:03,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 4.461538461538462) internal successors, (174), 36 states have internal predecessors, (174), 12 states have call successors, (38), 8 states have call predecessors, (38), 9 states have return successors, (35), 11 states have call predecessors, (35), 12 states have call successors, (35) [2021-11-12 23:31:03,757 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 374 transitions. [2021-11-12 23:31:03,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-12 23:31:03,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:03,760 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-12 23:31:03,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:04,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:04,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:04,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:31:04,373 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:04,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:04,374 INFO L85 PathProgramCache]: Analyzing trace with hash -469182501, now seen corresponding path program 1 times [2021-11-12 23:31:04,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:04,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428312102] [2021-11-12 23:31:04,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:04,378 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:04,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:04,379 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:04,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa89b16-1a97-4075-b582-e984acc1c689/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:31:08,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:08,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 1935 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-12 23:31:08,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:14,009 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:31:14,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:28,911 WARN L227 SmtUtils]: Spent 10.34s on a formula simplification. DAG size of input: 523 DAG size of output: 269 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-12 23:31:28,914 INFO L354 Elim1Store]: treesize reduction 837, result has 46.8 percent of original size [2021-11-12 23:31:28,914 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 128 treesize of output 771