./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_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_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/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_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/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_9ef409ea-54ab-4016-b3f7-df280621b218/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 b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:53:45,182 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:53:45,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:53:45,241 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:53:45,241 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:53:45,245 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:53:45,247 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:53:45,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:53:45,254 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:53:45,261 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:53:45,262 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:53:45,264 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:53:45,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:53:45,267 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:53:45,270 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:53:45,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:53:45,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:53:45,278 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:53:45,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:53:45,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:53:45,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:53:45,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:53:45,298 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:53:45,299 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:53:45,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:53:45,309 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:53:45,310 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:53:45,312 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:53:45,313 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:53:45,314 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:53:45,314 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:53:45,315 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:53:45,318 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:53:45,323 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:53:45,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:53:45,325 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:53:45,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:53:45,326 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:53:45,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:53:45,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:53:45,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:53:45,329 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 23:53:45,374 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:53:45,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:53:45,375 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:53:45,376 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:53:45,376 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:53:45,376 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:53:45,376 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:53:45,377 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:53:45,377 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:53:45,377 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:53:45,378 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:53:45,379 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:53:45,379 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:53:45,379 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:53:45,379 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:53:45,380 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:53:45,381 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:53:45,381 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:53:45,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:53:45,381 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:53:45,381 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:53:45,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:53:45,382 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:53:45,382 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:53:45,382 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:53:45,383 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:53:45,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:53:45,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:53:45,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:53:45,386 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:53:45,386 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:53:45,386 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:53:45,387 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:53:45,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:53:45,387 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:53:45,387 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:53:45,388 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:53:45,388 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_9ef409ea-54ab-4016-b3f7-df280621b218/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b [2021-11-12 23:53:45,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:53:45,713 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:53:45,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:53:45,718 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:53:45,718 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:53:45,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2021-11-12 23:53:45,786 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/data/17cd4cc20/f689a6154a48408db3d00b4696f38ac3/FLAGa96969375 [2021-11-12 23:53:46,629 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:53:46,629 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2021-11-12 23:53:46,676 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/data/17cd4cc20/f689a6154a48408db3d00b4696f38ac3/FLAGa96969375 [2021-11-12 23:53:47,160 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/data/17cd4cc20/f689a6154a48408db3d00b4696f38ac3 [2021-11-12 23:53:47,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:53:47,164 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:53:47,166 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:53:47,166 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:53:47,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:53:47,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:53:47" (1/1) ... [2021-11-12 23:53:47,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42e0fa38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:47, skipping insertion in model container [2021-11-12 23:53:47,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:53:47" (1/1) ... [2021-11-12 23:53:47,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:53:47,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:53:47,618 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_9ef409ea-54ab-4016-b3f7-df280621b218/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4495,4508] [2021-11-12 23:53:47,629 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_9ef409ea-54ab-4016-b3f7-df280621b218/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4555,4568] [2021-11-12 23:53:47,656 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 23:53:47,663 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 23:53:48,523 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:48,524 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:48,525 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:48,526 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:48,527 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:48,542 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:48,543 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:48,545 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:48,546 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:48,548 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:48,549 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:48,550 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:48,551 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:48,994 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 23:53:48,995 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 23:53:48,996 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 23:53:48,997 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 23:53:48,999 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 23:53:49,000 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 23:53:49,000 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 23:53:49,001 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 23:53:49,002 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 23:53:49,002 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 23:53:49,173 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 23:53:49,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:53:49,262 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 23:53:49,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1a748a61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:49, skipping insertion in model container [2021-11-12 23:53:49,263 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:53:49,263 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:53:49,265 INFO L158 Benchmark]: Toolchain (without parser) took 2099.60ms. Allocated memory was 94.4MB in the beginning and 113.2MB in the end (delta: 18.9MB). Free memory was 65.4MB in the beginning and 81.9MB in the end (delta: -16.5MB). Peak memory consumption was 36.1MB. Max. memory is 16.1GB. [2021-11-12 23:53:49,266 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 94.4MB. Free memory is still 68.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:53:49,267 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2097.06ms. Allocated memory was 94.4MB in the beginning and 113.2MB in the end (delta: 18.9MB). Free memory was 65.2MB in the beginning and 82.0MB in the end (delta: -16.7MB). Peak memory consumption was 36.1MB. Max. memory is 16.1GB. [2021-11-12 23:53:49,269 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 94.4MB. Free memory is still 68.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2097.06ms. Allocated memory was 94.4MB in the beginning and 113.2MB in the end (delta: 18.9MB). Free memory was 65.2MB in the beginning and 82.0MB in the end (delta: -16.7MB). Peak memory consumption was 36.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7037]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/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_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/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_9ef409ea-54ab-4016-b3f7-df280621b218/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 b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:53:51,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:53:51,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:53:51,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:53:51,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:53:51,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:53:51,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:53:51,717 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:53:51,720 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:53:51,722 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:53:51,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:53:51,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:53:51,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:53:51,738 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:53:51,741 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:53:51,743 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:53:51,745 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:53:51,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:53:51,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:53:51,760 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:53:51,768 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:53:51,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:53:51,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:53:51,772 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:53:51,775 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:53:51,776 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:53:51,776 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:53:51,778 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:53:51,778 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:53:51,779 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:53:51,780 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:53:51,781 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:53:51,782 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:53:51,783 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:53:51,784 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:53:51,785 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:53:51,786 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:53:51,786 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:53:51,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:53:51,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:53:51,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:53:51,790 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 23:53:51,815 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:53:51,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:53:51,817 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:53:51,817 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:53:51,817 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:53:51,817 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:53:51,818 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:53:51,818 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:53:51,818 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:53:51,819 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:53:51,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:53:51,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:53:51,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:53:51,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:53:51,821 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:53:51,821 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:53:51,821 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:53:51,822 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:53:51,822 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:53:51,822 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:53:51,822 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:53:51,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:53:51,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:53:51,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:53:51,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:53:51,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:53:51,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:53:51,824 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:53:51,825 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:53:51,825 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:53:51,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:53:51,825 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:53:51,825 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:53:51,826 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_9ef409ea-54ab-4016-b3f7-df280621b218/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b [2021-11-12 23:53:52,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:53:52,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:53:52,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:53:52,255 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:53:52,255 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:53:52,257 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2021-11-12 23:53:52,330 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/data/d78144c1a/aaabd6ad4b6e458bb420750cc605f971/FLAG1f858552c [2021-11-12 23:53:53,145 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:53:53,145 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2021-11-12 23:53:53,186 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/data/d78144c1a/aaabd6ad4b6e458bb420750cc605f971/FLAG1f858552c [2021-11-12 23:53:53,699 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/data/d78144c1a/aaabd6ad4b6e458bb420750cc605f971 [2021-11-12 23:53:53,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:53:53,703 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:53:53,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:53:53,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:53:53,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:53:53,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:53:53" (1/1) ... [2021-11-12 23:53:53,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15a0f79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:53, skipping insertion in model container [2021-11-12 23:53:53,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:53:53" (1/1) ... [2021-11-12 23:53:53,719 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:53:53,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:53:54,210 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_9ef409ea-54ab-4016-b3f7-df280621b218/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4495,4508] [2021-11-12 23:53:54,217 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_9ef409ea-54ab-4016-b3f7-df280621b218/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4555,4568] [2021-11-12 23:53:54,247 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 23:53:54,255 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 23:53:55,648 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:55,650 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:55,651 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:55,652 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:55,654 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:55,687 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:55,689 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:55,694 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:55,695 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:55,697 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:55,698 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:55,699 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:55,700 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:56,092 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 23:53:56,095 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 23:53:56,096 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 23:53:56,098 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 23:53:56,099 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 23:53:56,100 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 23:53:56,101 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 23:53:56,102 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 23:53:56,113 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 23:53:56,114 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 23:53:56,269 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 23:53:56,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:53:56,362 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:53:56,422 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:53:56,426 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_9ef409ea-54ab-4016-b3f7-df280621b218/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4495,4508] [2021-11-12 23:53:56,428 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_9ef409ea-54ab-4016-b3f7-df280621b218/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4555,4568] [2021-11-12 23:53:56,429 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 23:53:56,430 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 23:53:56,502 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:56,502 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:56,502 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:56,503 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:56,504 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:56,515 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:56,515 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:56,517 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:56,518 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:56,519 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:56,519 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:56,520 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:56,521 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:56,597 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 23:53:56,598 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 23:53:56,599 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 23:53:56,599 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 23:53:56,605 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 23:53:56,606 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 23:53:56,607 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 23:53:56,607 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 23:53:56,608 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 23:53:56,608 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 23:53:56,639 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 23:53:56,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:53:56,674 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:53:56,697 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_9ef409ea-54ab-4016-b3f7-df280621b218/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4495,4508] [2021-11-12 23:53:56,710 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_9ef409ea-54ab-4016-b3f7-df280621b218/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4555,4568] [2021-11-12 23:53:56,712 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 23:53:56,713 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 23:53:56,757 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:56,758 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:56,758 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:56,759 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:56,761 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:56,793 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:56,794 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:56,795 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:56,795 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:56,796 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:56,797 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:56,797 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:56,798 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:53:56,832 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 23:53:56,833 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 23:53:56,834 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 23:53:56,834 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 23:53:56,835 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 23:53:56,836 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 23:53:56,837 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 23:53:56,838 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 23:53:56,838 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 23:53:56,839 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 23:53:56,868 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 23:53:56,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:53:57,164 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:53:57,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:57 WrapperNode [2021-11-12 23:53:57,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:53:57,166 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:53:57,166 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:53:57,166 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:53:57,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:57" (1/1) ... [2021-11-12 23:53:57,300 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:57" (1/1) ... [2021-11-12 23:53:57,355 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:53:57,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:53:57,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:53:57,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:53:57,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:57" (1/1) ... [2021-11-12 23:53:57,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:57" (1/1) ... [2021-11-12 23:53:57,370 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:57" (1/1) ... [2021-11-12 23:53:57,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:57" (1/1) ... [2021-11-12 23:53:57,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:57" (1/1) ... [2021-11-12 23:53:57,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:57" (1/1) ... [2021-11-12 23:53:57,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:57" (1/1) ... [2021-11-12 23:53:57,406 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:53:57,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:53:57,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:53:57,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:53:57,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:57" (1/1) ... [2021-11-12 23:53:57,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:53:57,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:53:57,460 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:53:57,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:53:57,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:53:57,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:53:57,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 23:53:57,517 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 23:53:57,517 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-12 23:53:57,517 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-12 23:53:57,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:53:57,518 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-12 23:53:57,518 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-12 23:53:57,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:53:57,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:53:57,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:53:57,519 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 23:53:57,519 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 23:53:57,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:53:57,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:53:57,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 23:53:57,520 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-12 23:53:57,520 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-12 23:53:58,260 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:53:58,260 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-12 23:53:58,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:53:58 BoogieIcfgContainer [2021-11-12 23:53:58,262 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:53:58,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:53:58,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:53:58,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:53:58,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:53:53" (1/3) ... [2021-11-12 23:53:58,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@179249e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:53:58, skipping insertion in model container [2021-11-12 23:53:58,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:57" (2/3) ... [2021-11-12 23:53:58,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@179249e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:53:58, skipping insertion in model container [2021-11-12 23:53:58,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:53:58" (3/3) ... [2021-11-12 23:53:58,271 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_begin_harness.i [2021-11-12 23:53:58,277 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:53:58,277 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:53:58,329 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:53:58,336 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 23:53:58,337 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:53:58,357 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 49 states have (on average 1.346938775510204) internal successors, (66), 50 states have internal predecessors, (66), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-12 23:53:58,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 23:53:58,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:58,368 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:53:58,368 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:53:58,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:58,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1062572114, now seen corresponding path program 1 times [2021-11-12 23:53:58,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:58,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523560516] [2021-11-12 23:53:58,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:58,399 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:58,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:58,407 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:58,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:53:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:58,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:53:58,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:58,960 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 23:53:58,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 23:53:59,115 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:59,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523560516] [2021-11-12 23:53:59,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523560516] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:53:59,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:53:59,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-12 23:53:59,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608691700] [2021-11-12 23:53:59,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:59,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:53:59,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:59,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:53:59,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:53:59,156 INFO L87 Difference]: Start difference. First operand has 69 states, 49 states have (on average 1.346938775510204) internal successors, (66), 50 states have internal predecessors, (66), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:53:59,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:59,187 INFO L93 Difference]: Finished difference Result 130 states and 186 transitions. [2021-11-12 23:53:59,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:53:59,189 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2021-11-12 23:53:59,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:59,197 INFO L225 Difference]: With dead ends: 130 [2021-11-12 23:53:59,198 INFO L226 Difference]: Without dead ends: 64 [2021-11-12 23:53:59,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 134 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 23:53:59,205 INFO L933 BasicCegarLoop]: 88 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, 88 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.47ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:59,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 1.47ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:53:59,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-12 23:53:59,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-11-12 23:53:59,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.288888888888889) internal successors, (58), 46 states have internal predecessors, (58), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-12 23:53:59,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2021-11-12 23:53:59,248 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 68 [2021-11-12 23:53:59,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:59,248 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2021-11-12 23:53:59,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:53:59,249 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2021-11-12 23:53:59,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 23:53:59,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:59,253 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:53:59,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:59,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:53:59,469 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:53:59,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:59,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1946087212, now seen corresponding path program 1 times [2021-11-12 23:53:59,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:59,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438297441] [2021-11-12 23:53:59,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:59,471 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:59,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:59,473 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:59,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:53:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:59,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:53:59,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:53:59,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:00,154 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:54:00,154 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:00,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [438297441] [2021-11-12 23:54:00,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [438297441] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:54:00,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:54:00,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2021-11-12 23:54:00,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664962120] [2021-11-12 23:54:00,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:00,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:54:00,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:00,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:54:00,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:54:00,159 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-12 23:54:00,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:00,262 INFO L93 Difference]: Finished difference Result 116 states and 154 transitions. [2021-11-12 23:54:00,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:54:00,264 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2021-11-12 23:54:00,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:00,271 INFO L225 Difference]: With dead ends: 116 [2021-11-12 23:54:00,271 INFO L226 Difference]: Without dead ends: 66 [2021-11-12 23:54:00,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:54:00,276 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 2 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.17ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.49ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:00,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 381 Invalid, 28 Unknown, 0 Unchecked, 9.17ms Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 47.49ms Time] [2021-11-12 23:54:00,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-12 23:54:00,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-11-12 23:54:00,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 48 states have internal predecessors, (59), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2021-11-12 23:54:00,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 87 transitions. [2021-11-12 23:54:00,300 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 87 transitions. Word has length 68 [2021-11-12 23:54:00,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:00,301 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 87 transitions. [2021-11-12 23:54:00,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-12 23:54:00,301 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 87 transitions. [2021-11-12 23:54:00,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-12 23:54:00,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:00,309 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:00,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:00,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:54:00,531 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:00,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:00,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1195332088, now seen corresponding path program 1 times [2021-11-12 23:54:00,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:00,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1929281700] [2021-11-12 23:54:00,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:00,533 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:00,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:00,536 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:00,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:54:00,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:00,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:54:00,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:01,014 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:54:01,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:01,439 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:54:01,442 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:01,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1929281700] [2021-11-12 23:54:01,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1929281700] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:54:01,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:54:01,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2021-11-12 23:54:01,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544697779] [2021-11-12 23:54:01,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:01,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:54:01,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:01,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:54:01,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:54:01,444 INFO L87 Difference]: Start difference. First operand 66 states and 87 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:54:01,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:01,672 INFO L93 Difference]: Finished difference Result 121 states and 163 transitions. [2021-11-12 23:54:01,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:54:01,673 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2021-11-12 23:54:01,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:01,675 INFO L225 Difference]: With dead ends: 121 [2021-11-12 23:54:01,675 INFO L226 Difference]: Without dead ends: 69 [2021-11-12 23:54:01,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:54:01,677 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 39 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 146.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.22ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 183.59ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:01,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 285 Invalid, 84 Unknown, 0 Unchecked, 4.22ms Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 183.59ms Time] [2021-11-12 23:54:01,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-12 23:54:01,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-12 23:54:01,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 51 states have internal predecessors, (61), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-12 23:54:01,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 91 transitions. [2021-11-12 23:54:01,705 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 91 transitions. Word has length 70 [2021-11-12 23:54:01,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:01,705 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 91 transitions. [2021-11-12 23:54:01,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:54:01,706 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 91 transitions. [2021-11-12 23:54:01,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-12 23:54:01,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:01,707 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:01,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:01,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:54:01,911 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:01,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:01,912 INFO L85 PathProgramCache]: Analyzing trace with hash -316025515, now seen corresponding path program 1 times [2021-11-12 23:54:01,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:01,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162333502] [2021-11-12 23:54:01,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:01,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:01,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:01,914 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:01,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:54:02,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:02,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:54:02,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:02,331 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:54:02,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:02,709 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:54:02,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:02,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162333502] [2021-11-12 23:54:02,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162333502] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:54:02,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:54:02,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-11-12 23:54:02,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126611869] [2021-11-12 23:54:02,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:02,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:54:02,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:02,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:54:02,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:54:02,712 INFO L87 Difference]: Start difference. First operand 69 states and 91 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:54:03,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:03,011 INFO L93 Difference]: Finished difference Result 136 states and 187 transitions. [2021-11-12 23:54:03,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:54:03,012 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2021-11-12 23:54:03,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:03,013 INFO L225 Difference]: With dead ends: 136 [2021-11-12 23:54:03,014 INFO L226 Difference]: Without dead ends: 81 [2021-11-12 23:54:03,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:54:03,015 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 67 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 185.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.12ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 216.08ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:03,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 343 Invalid, 135 Unknown, 0 Unchecked, 4.12ms Time], IncrementalHoareTripleChecker [10 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 216.08ms Time] [2021-11-12 23:54:03,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-12 23:54:03,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2021-11-12 23:54:03,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.28) internal successors, (64), 53 states have internal predecessors, (64), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-12 23:54:03,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2021-11-12 23:54:03,037 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 72 [2021-11-12 23:54:03,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:03,037 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2021-11-12 23:54:03,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:54:03,038 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2021-11-12 23:54:03,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 23:54:03,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:03,039 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:03,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:03,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:54:03,253 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:03,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:03,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1928092350, now seen corresponding path program 1 times [2021-11-12 23:54:03,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:03,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1799651624] [2021-11-12 23:54:03,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:03,255 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:03,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:03,256 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:03,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:54:03,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:03,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:54:03,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:03,716 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:54:03,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:03,926 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 23:54:03,927 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:03,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1799651624] [2021-11-12 23:54:03,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1799651624] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:54:03,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:54:03,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3] total 7 [2021-11-12 23:54:03,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651350543] [2021-11-12 23:54:03,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:03,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:54:03,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:03,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:54:03,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:54:03,929 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:54:04,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:04,181 INFO L93 Difference]: Finished difference Result 137 states and 191 transitions. [2021-11-12 23:54:04,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:54:04,182 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2021-11-12 23:54:04,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:04,185 INFO L225 Difference]: With dead ends: 137 [2021-11-12 23:54:04,185 INFO L226 Difference]: Without dead ends: 80 [2021-11-12 23:54:04,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:54:04,187 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 48 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 165.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.61ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 204.64ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:04,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 282 Invalid, 104 Unknown, 0 Unchecked, 3.61ms Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 204.64ms Time] [2021-11-12 23:54:04,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-12 23:54:04,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2021-11-12 23:54:04,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 54 states have internal predecessors, (65), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-12 23:54:04,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 95 transitions. [2021-11-12 23:54:04,201 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 95 transitions. Word has length 73 [2021-11-12 23:54:04,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:04,202 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 95 transitions. [2021-11-12 23:54:04,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:54:04,202 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 95 transitions. [2021-11-12 23:54:04,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-12 23:54:04,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:04,204 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:04,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:04,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:54:04,423 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:04,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:04,424 INFO L85 PathProgramCache]: Analyzing trace with hash 137287748, now seen corresponding path program 1 times [2021-11-12 23:54:04,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:04,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888892860] [2021-11-12 23:54:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:04,425 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:04,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:04,425 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:04,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:54:04,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:04,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:54:04,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:04,827 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:54:04,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:05,075 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:54:05,075 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:05,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888892860] [2021-11-12 23:54:05,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888892860] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:54:05,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:54:05,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-12 23:54:05,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991441652] [2021-11-12 23:54:05,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:05,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:54:05,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:05,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:54:05,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:54:05,078 INFO L87 Difference]: Start difference. First operand 72 states and 95 transitions. Second operand has 7 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-12 23:54:05,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:05,177 INFO L93 Difference]: Finished difference Result 136 states and 183 transitions. [2021-11-12 23:54:05,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:54:05,182 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 81 [2021-11-12 23:54:05,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:05,188 INFO L225 Difference]: With dead ends: 136 [2021-11-12 23:54:05,188 INFO L226 Difference]: Without dead ends: 78 [2021-11-12 23:54:05,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:54:05,192 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 4 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.97ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.17ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:05,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 473 Invalid, 41 Unknown, 0 Unchecked, 6.97ms Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 50.17ms Time] [2021-11-12 23:54:05,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-12 23:54:05,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2021-11-12 23:54:05,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 55 states have internal predecessors, (66), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-12 23:54:05,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 96 transitions. [2021-11-12 23:54:05,217 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 96 transitions. Word has length 81 [2021-11-12 23:54:05,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:05,218 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 96 transitions. [2021-11-12 23:54:05,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-12 23:54:05,218 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 96 transitions. [2021-11-12 23:54:05,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-12 23:54:05,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:05,227 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:05,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:05,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:54:05,444 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:05,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:05,445 INFO L85 PathProgramCache]: Analyzing trace with hash 431382673, now seen corresponding path program 1 times [2021-11-12 23:54:05,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:05,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [588533409] [2021-11-12 23:54:05,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:05,446 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:05,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:05,447 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:05,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:54:05,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:05,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 23:54:05,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:06,669 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:54:06,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:07,136 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:54:07,136 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:07,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [588533409] [2021-11-12 23:54:07,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [588533409] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:54:07,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2146486849] [2021-11-12 23:54:07,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:07,137 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:54:07,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:54:07,139 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:54:07,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-12 23:54:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:07,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:54:07,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:54:07,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:08,059 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:54:08,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2146486849] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:54:08,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:54:08,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8, 8] total 19 [2021-11-12 23:54:08,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578616124] [2021-11-12 23:54:08,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:08,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:54:08,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:08,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:54:08,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:54:08,061 INFO L87 Difference]: Start difference. First operand 73 states and 96 transitions. Second operand has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:54:08,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:08,270 INFO L93 Difference]: Finished difference Result 141 states and 190 transitions. [2021-11-12 23:54:08,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 23:54:08,272 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 83 [2021-11-12 23:54:08,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:08,273 INFO L225 Difference]: With dead ends: 141 [2021-11-12 23:54:08,274 INFO L226 Difference]: Without dead ends: 82 [2021-11-12 23:54:08,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:54:08,277 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 8 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.33ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 65.27ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:08,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 558 Invalid, 59 Unknown, 0 Unchecked, 3.33ms Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 65.27ms Time] [2021-11-12 23:54:08,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-12 23:54:08,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2021-11-12 23:54:08,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 56 states have internal predecessors, (67), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-12 23:54:08,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2021-11-12 23:54:08,297 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 83 [2021-11-12 23:54:08,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:08,298 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2021-11-12 23:54:08,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:54:08,298 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2021-11-12 23:54:08,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-12 23:54:08,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:08,300 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:08,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:08,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:08,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:54:08,712 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:08,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:08,713 INFO L85 PathProgramCache]: Analyzing trace with hash -233275002, now seen corresponding path program 1 times [2021-11-12 23:54:08,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:08,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098514966] [2021-11-12 23:54:08,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:08,714 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:08,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:08,718 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:08,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:54:08,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:08,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-12 23:54:08,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:54:10,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:14,497 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:54:14,498 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 23:54:14,535 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-12 23:54:14,536 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 23:54:14,663 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:54:14,663 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:14,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098514966] [2021-11-12 23:54:14,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098514966] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:54:14,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1237233382] [2021-11-12 23:54:14,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:14,664 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:54:14,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:54:14,665 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:54:14,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-12 23:54:14,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:14,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:54:14,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:54:15,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 23:54:15,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1237233382] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:54:15,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:54:15,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13, 10, 6] total 24 [2021-11-12 23:54:15,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278985971] [2021-11-12 23:54:15,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:15,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:54:15,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:15,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:54:15,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:54:15,620 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 6 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-12 23:54:15,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:15,708 INFO L93 Difference]: Finished difference Result 129 states and 171 transitions. [2021-11-12 23:54:15,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:54:15,712 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 84 [2021-11-12 23:54:15,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:15,713 INFO L225 Difference]: With dead ends: 129 [2021-11-12 23:54:15,713 INFO L226 Difference]: Without dead ends: 76 [2021-11-12 23:54:15,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 307 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:54:15,715 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 2 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.83ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.16ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:15,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 381 Invalid, 28 Unknown, 0 Unchecked, 1.83ms Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 40.16ms Time] [2021-11-12 23:54:15,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-12 23:54:15,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-12 23:54:15,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 58 states have internal predecessors, (68), 13 states have call successors, (13), 5 states have call predecessors, (13), 8 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2021-11-12 23:54:15,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 100 transitions. [2021-11-12 23:54:15,736 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 100 transitions. Word has length 84 [2021-11-12 23:54:15,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:15,736 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 100 transitions. [2021-11-12 23:54:15,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-12 23:54:15,737 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 100 transitions. [2021-11-12 23:54:15,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-12 23:54:15,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:15,738 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:15,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:15,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:16,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:54:16,150 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:16,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:16,150 INFO L85 PathProgramCache]: Analyzing trace with hash 788375522, now seen corresponding path program 1 times [2021-11-12 23:54:16,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:16,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018188966] [2021-11-12 23:54:16,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:16,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:16,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:16,153 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:16,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:54:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:16,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:54:16,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:16,636 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:54:16,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:16,934 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:54:16,935 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:16,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018188966] [2021-11-12 23:54:16,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018188966] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:54:16,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:54:16,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2021-11-12 23:54:16,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046430302] [2021-11-12 23:54:16,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:16,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:54:16,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:16,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:54:16,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:54:16,938 INFO L87 Difference]: Start difference. First operand 76 states and 100 transitions. Second operand has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:54:17,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:17,185 INFO L93 Difference]: Finished difference Result 138 states and 180 transitions. [2021-11-12 23:54:17,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:54:17,186 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 86 [2021-11-12 23:54:17,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:17,187 INFO L225 Difference]: With dead ends: 138 [2021-11-12 23:54:17,187 INFO L226 Difference]: Without dead ends: 76 [2021-11-12 23:54:17,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:54:17,189 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 44 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 166.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.41ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 198.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:17,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 338 Invalid, 112 Unknown, 0 Unchecked, 2.41ms Time], IncrementalHoareTripleChecker [17 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 198.54ms Time] [2021-11-12 23:54:17,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-12 23:54:17,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-12 23:54:17,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 58 states have internal predecessors, (67), 13 states have call successors, (13), 5 states have call predecessors, (13), 8 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2021-11-12 23:54:17,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 99 transitions. [2021-11-12 23:54:17,199 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 99 transitions. Word has length 86 [2021-11-12 23:54:17,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:17,200 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 99 transitions. [2021-11-12 23:54:17,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:54:17,200 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 99 transitions. [2021-11-12 23:54:17,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-12 23:54:17,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:17,202 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:17,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:17,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:54:17,407 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:17,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:17,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1039859473, now seen corresponding path program 1 times [2021-11-12 23:54:17,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:17,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542792949] [2021-11-12 23:54:17,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:17,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:17,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:17,409 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:17,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:54:17,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:17,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:54:17,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:54:17,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:18,206 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:54:18,207 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:18,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542792949] [2021-11-12 23:54:18,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542792949] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:54:18,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:54:18,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 11 [2021-11-12 23:54:18,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763436075] [2021-11-12 23:54:18,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:18,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:54:18,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:18,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:54:18,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:54:18,211 INFO L87 Difference]: Start difference. First operand 76 states and 99 transitions. Second operand has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:54:18,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:18,538 INFO L93 Difference]: Finished difference Result 140 states and 183 transitions. [2021-11-12 23:54:18,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:54:18,540 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 88 [2021-11-12 23:54:18,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:18,541 INFO L225 Difference]: With dead ends: 140 [2021-11-12 23:54:18,542 INFO L226 Difference]: Without dead ends: 77 [2021-11-12 23:54:18,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:54:18,543 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 65 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 213.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.79ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 243.81ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:18,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 389 Invalid, 154 Unknown, 0 Unchecked, 2.79ms Time], IncrementalHoareTripleChecker [25 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 243.81ms Time] [2021-11-12 23:54:18,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-12 23:54:18,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2021-11-12 23:54:18,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 54 states have internal predecessors, (63), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-12 23:54:18,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2021-11-12 23:54:18,550 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 88 [2021-11-12 23:54:18,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:18,550 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2021-11-12 23:54:18,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:54:18,551 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2021-11-12 23:54:18,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-12 23:54:18,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:18,553 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:18,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:18,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:54:18,771 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:18,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:18,771 INFO L85 PathProgramCache]: Analyzing trace with hash 2465506, now seen corresponding path program 1 times [2021-11-12 23:54:18,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:18,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [70751688] [2021-11-12 23:54:18,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:18,772 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:18,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:18,785 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:18,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:54:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:19,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-12 23:54:19,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:42,530 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 51 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:54:42,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:55:03,009 INFO L354 Elim1Store]: treesize reduction 25, result has 75.7 percent of original size [2021-11-12 23:55:03,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 125 [2021-11-12 23:55:03,374 INFO L354 Elim1Store]: treesize reduction 15, result has 77.6 percent of original size [2021-11-12 23:55:03,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 132 [2021-11-12 23:55:09,902 INFO L354 Elim1Store]: treesize reduction 25, result has 75.7 percent of original size [2021-11-12 23:55:09,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 121 [2021-11-12 23:55:10,219 INFO L354 Elim1Store]: treesize reduction 15, result has 77.6 percent of original size [2021-11-12 23:55:10,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 132 [2021-11-12 23:55:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 23:55:12,178 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:55:12,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [70751688] [2021-11-12 23:55:12,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [70751688] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:55:12,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [772761862] [2021-11-12 23:55:12,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:55:12,179 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:55:12,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:55:12,186 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:55:12,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 23:55:12,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:55:12,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:55:12,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:55:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 23:55:13,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:55:13,499 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-12 23:55:13,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [772761862] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:55:13,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:55:13,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [24, 21, 7] total 46 [2021-11-12 23:55:13,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83687205] [2021-11-12 23:55:13,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:55:13,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:55:13,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:55:13,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:55:13,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1906, Unknown=12, NotChecked=0, Total=2070 [2021-11-12 23:55:13,503 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-12 23:55:13,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:55:13,772 INFO L93 Difference]: Finished difference Result 126 states and 165 transitions. [2021-11-12 23:55:13,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:55:13,775 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 97 [2021-11-12 23:55:13,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:55:13,776 INFO L225 Difference]: With dead ends: 126 [2021-11-12 23:55:13,776 INFO L226 Difference]: Without dead ends: 75 [2021-11-12 23:55:13,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 339 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 38.2s TimeCoverageRelationStatistics Valid=161, Invalid=2083, Unknown=12, NotChecked=0, Total=2256 [2021-11-12 23:55:13,778 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 4 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.96ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 59.51ms IncrementalHoareTripleChecker+Time [2021-11-12 23:55:13,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 462 Invalid, 40 Unknown, 0 Unchecked, 1.96ms Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 59.51ms Time] [2021-11-12 23:55:13,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-12 23:55:13,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2021-11-12 23:55:13,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 55 states have internal predecessors, (64), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-12 23:55:13,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2021-11-12 23:55:13,791 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 97 [2021-11-12 23:55:13,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:55:13,792 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2021-11-12 23:55:13,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-12 23:55:13,792 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2021-11-12 23:55:13,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-12 23:55:13,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:55:13,795 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:55:13,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:55:14,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:55:14,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:55:14,199 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:55:14,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:55:14,199 INFO L85 PathProgramCache]: Analyzing trace with hash -385140753, now seen corresponding path program 2 times [2021-11-12 23:55:14,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:55:14,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1657513453] [2021-11-12 23:55:14,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:55:14,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:55:14,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:55:14,202 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:55:14,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:55:14,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:55:14,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:55:14,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-12 23:55:14,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:55:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 35 proven. 23 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 23:55:16,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:55:20,099 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:55:20,099 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 23:55:20,119 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-12 23:55:20,120 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 23:55:20,236 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:55:20,236 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:55:20,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1657513453] [2021-11-12 23:55:20,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1657513453] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:55:20,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1586772104] [2021-11-12 23:55:20,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:55:20,237 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:55:20,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:55:20,243 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:55:20,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 23:55:20,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:55:20,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:55:20,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:55:20,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:55:21,318 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:55:21,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:55:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 23:55:21,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1586772104] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:55:21,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:55:21,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13, 10, 8] total 26 [2021-11-12 23:55:21,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297095220] [2021-11-12 23:55:21,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:55:21,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:55:21,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:55:21,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:55:21,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:55:21,565 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand has 8 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-12 23:55:21,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:55:21,721 INFO L93 Difference]: Finished difference Result 127 states and 165 transitions. [2021-11-12 23:55:21,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:55:21,726 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 99 [2021-11-12 23:55:21,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:55:21,728 INFO L225 Difference]: With dead ends: 127 [2021-11-12 23:55:21,728 INFO L226 Difference]: Without dead ends: 75 [2021-11-12 23:55:21,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 362 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-11-12 23:55:21,729 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 8 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.71ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.50ms IncrementalHoareTripleChecker+Time [2021-11-12 23:55:21,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 527 Invalid, 53 Unknown, 0 Unchecked, 1.71ms Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 50.50ms Time] [2021-11-12 23:55:21,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-12 23:55:21,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2021-11-12 23:55:21,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 50 states have (on average 1.24) internal successors, (62), 52 states have internal predecessors, (62), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-12 23:55:21,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2021-11-12 23:55:21,737 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 99 [2021-11-12 23:55:21,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:55:21,738 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2021-11-12 23:55:21,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-12 23:55:21,738 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2021-11-12 23:55:21,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-12 23:55:21,739 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:55:21,740 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:55:21,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:55:21,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:55:22,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:55:22,162 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:55:22,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:55:22,163 INFO L85 PathProgramCache]: Analyzing trace with hash -596272544, now seen corresponding path program 2 times [2021-11-12 23:55:22,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:55:22,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211620370] [2021-11-12 23:55:22,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:55:22,164 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:55:22,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:55:22,165 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:55:22,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:55:22,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:55:22,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:55:22,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-12 23:55:22,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:55:24,803 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 25 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:55:24,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:55:28,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:55:28,069 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 23:55:28,088 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-12 23:55:28,089 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 23:55:28,173 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:55:28,174 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:55:28,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211620370] [2021-11-12 23:55:28,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211620370] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:55:28,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1912865212] [2021-11-12 23:55:28,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:55:28,174 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:55:28,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:55:28,175 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:55:28,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-12 23:55:28,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:55:28,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:55:28,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-12 23:55:28,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:55:28,959 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-12 23:55:28,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-12 23:55:37,313 WARN L227 SmtUtils]: Spent 8.35s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-12 23:55:37,314 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:55:37,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 84 [2021-11-12 23:57:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 25 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:57:40,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:57:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:57:41,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1912865212] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:57:41,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274761787] [2021-11-12 23:57:41,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:57:41,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:57:41,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:57:41,880 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:57:41,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef409ea-54ab-4016-b3f7-df280621b218/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-12 23:57:42,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:57:42,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:57:42,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-12 23:57:42,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:57:50,486 WARN L227 SmtUtils]: Spent 8.38s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-12 23:57:50,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:57:50,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 76 [2021-11-12 23:57:56,717 WARN L227 SmtUtils]: Spent 6.23s on a formula simplification. DAG size of input: 21 DAG size of output: 12 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-12 23:57:56,718 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-12 23:57:56,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 90