./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/neural-networks/cartpole_25_safe.c-amalgamation.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/neural-networks/cartpole_25_safe.c-amalgamation.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --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 32bit --witnessprinter.graph.data.programhash 613768669e804493120851cfd03327ced761ad8deea81059331be7bcd669e286 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:24:16,282 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:24:16,359 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:24:16,365 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:24:16,366 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:24:16,393 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:24:16,394 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:24:16,394 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:24:16,402 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:24:16,407 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:24:16,408 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:24:16,409 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:24:16,409 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:24:16,411 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:24:16,411 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:24:16,412 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:24:16,412 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:24:16,413 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:24:16,413 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:24:16,415 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:24:16,416 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:24:16,416 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:24:16,417 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:24:16,418 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:24:16,418 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:24:16,419 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:24:16,419 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:24:16,420 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:24:16,420 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:24:16,421 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:24:16,422 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:24:16,422 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:24:16,423 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:24:16,423 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:24:16,423 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:24:16,424 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:24:16,424 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:24:16,424 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:24:16,424 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:24:16,425 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:24:16,425 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:24:16,426 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:24:16,426 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:24:16,427 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:24:16,427 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:24:16,427 INFO L153 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_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 613768669e804493120851cfd03327ced761ad8deea81059331be7bcd669e286 [2023-11-19 05:24:16,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:24:16,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:24:16,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:24:16,807 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:24:16,808 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:24:16,809 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/neural-networks/cartpole_25_safe.c-amalgamation.i [2023-11-19 05:24:19,957 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:24:20,438 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:24:20,439 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/sv-benchmarks/c/neural-networks/cartpole_25_safe.c-amalgamation.i [2023-11-19 05:24:20,484 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/data/1aab9c2b2/e0443a0e78164defae787f19eefbe157/FLAGabad62adb [2023-11-19 05:24:20,501 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/data/1aab9c2b2/e0443a0e78164defae787f19eefbe157 [2023-11-19 05:24:20,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:24:20,511 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:24:20,518 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:24:20,518 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:24:20,524 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:24:20,525 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:24:20" (1/1) ... [2023-11-19 05:24:20,526 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58fb5302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:20, skipping insertion in model container [2023-11-19 05:24:20,526 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:24:20" (1/1) ... [2023-11-19 05:24:20,656 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:24:20,874 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 05:24:21,430 WARN L240 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_73c33935-b9ee-4cf0-adb1-5c67777dc364/sv-benchmarks/c/neural-networks/cartpole_25_safe.c-amalgamation.i[63695,63708] [2023-11-19 05:24:21,705 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:24:21,886 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:24:21,917 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 05:24:21,939 WARN L240 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_73c33935-b9ee-4cf0-adb1-5c67777dc364/sv-benchmarks/c/neural-networks/cartpole_25_safe.c-amalgamation.i[63695,63708] [2023-11-19 05:24:22,038 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:24:22,521 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 05:24:22,529 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:24:22,530 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:22 WrapperNode [2023-11-19 05:24:22,530 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:24:22,531 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:24:22,532 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:24:22,532 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:24:22,540 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:22" (1/1) ... [2023-11-19 05:24:22,656 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:22" (1/1) ... [2023-11-19 05:24:22,948 INFO L138 Inliner]: procedures = 621, calls = 4747, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 5015 [2023-11-19 05:24:22,948 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:24:22,949 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:24:22,949 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:24:22,950 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:24:22,960 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:22" (1/1) ... [2023-11-19 05:24:22,965 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:22" (1/1) ... [2023-11-19 05:24:23,020 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:22" (1/1) ... [2023-11-19 05:24:23,020 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:22" (1/1) ... [2023-11-19 05:24:23,278 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:22" (1/1) ... [2023-11-19 05:24:23,296 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:22" (1/1) ... [2023-11-19 05:24:23,313 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:22" (1/1) ... [2023-11-19 05:24:23,333 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:22" (1/1) ... [2023-11-19 05:24:23,367 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:24:23,368 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:24:23,368 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:24:23,369 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:24:23,369 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:22" (1/1) ... [2023-11-19 05:24:23,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:24:23,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:24:23,406 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:24:23,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:24:23,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-19 05:24:23,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:24:23,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2023-11-19 05:24:23,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2023-11-19 05:24:23,464 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:24:23,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:24:23,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:24:23,464 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 05:24:23,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:24:23,664 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:24:23,666 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:24:37,196 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:24:40,342 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:24:40,343 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-11-19 05:24:40,348 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:24:40 BoogieIcfgContainer [2023-11-19 05:24:40,349 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:24:40,352 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:24:40,353 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:24:40,356 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:24:40,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:24:20" (1/3) ... [2023-11-19 05:24:40,359 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac0bb6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:24:40, skipping insertion in model container [2023-11-19 05:24:40,360 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:22" (2/3) ... [2023-11-19 05:24:40,361 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac0bb6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:24:40, skipping insertion in model container [2023-11-19 05:24:40,361 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:24:40" (3/3) ... [2023-11-19 05:24:40,362 INFO L112 eAbstractionObserver]: Analyzing ICFG cartpole_25_safe.c-amalgamation.i [2023-11-19 05:24:40,384 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:24:40,385 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:24:40,450 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:24:40,460 INFO L357 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=LoopHeads, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@442f9c82, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:24:40,460 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:24:40,466 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:24:40,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 05:24:40,474 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:40,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:40,475 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:40,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:40,484 INFO L85 PathProgramCache]: Analyzing trace with hash -873503770, now seen corresponding path program 1 times [2023-11-19 05:24:40,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:40,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685633] [2023-11-19 05:24:40,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:40,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:42,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:24:42,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:42,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685633] [2023-11-19 05:24:42,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685633] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:42,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:24:42,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:24:42,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801504608] [2023-11-19 05:24:42,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:42,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:24:42,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:42,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:24:42,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:24:42,450 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:24:42,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:42,780 INFO L93 Difference]: Finished difference Result 35 states and 59 transitions. [2023-11-19 05:24:42,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:24:42,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-19 05:24:42,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:42,792 INFO L225 Difference]: With dead ends: 35 [2023-11-19 05:24:42,792 INFO L226 Difference]: Without dead ends: 17 [2023-11-19 05:24:42,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:24:42,801 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:42,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:24:42,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-19 05:24:42,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-19 05:24:42,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:24:42,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 28 transitions. [2023-11-19 05:24:42,854 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 28 transitions. Word has length 9 [2023-11-19 05:24:42,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:42,855 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 28 transitions. [2023-11-19 05:24:42,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:24:42,855 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 28 transitions. [2023-11-19 05:24:42,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 05:24:42,856 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:42,856 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:42,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:24:42,857 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:42,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:42,859 INFO L85 PathProgramCache]: Analyzing trace with hash 894430026, now seen corresponding path program 1 times [2023-11-19 05:24:42,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:42,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864132977] [2023-11-19 05:24:42,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:42,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:44,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:24:44,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:44,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864132977] [2023-11-19 05:24:44,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864132977] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:24:44,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206607096] [2023-11-19 05:24:44,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:44,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:24:44,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:24:44,281 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:24:44,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:24:45,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:45,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 5392 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 05:24:46,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:24:46,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:24:46,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:24:46,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:24:46,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206607096] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 05:24:46,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:24:46,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 4] total 6 [2023-11-19 05:24:46,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928579290] [2023-11-19 05:24:46,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:46,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:24:46,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:46,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:24:46,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:24:46,058 INFO L87 Difference]: Start difference. First operand 17 states and 28 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:24:46,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:46,454 INFO L93 Difference]: Finished difference Result 28 states and 46 transitions. [2023-11-19 05:24:46,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:24:46,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-19 05:24:46,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:46,456 INFO L225 Difference]: With dead ends: 28 [2023-11-19 05:24:46,456 INFO L226 Difference]: Without dead ends: 18 [2023-11-19 05:24:46,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:24:46,458 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:46,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:24:46,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-19 05:24:46,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-19 05:24:46,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:24:46,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 29 transitions. [2023-11-19 05:24:46,465 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 29 transitions. Word has length 10 [2023-11-19 05:24:46,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:46,465 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 29 transitions. [2023-11-19 05:24:46,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:24:46,466 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 29 transitions. [2023-11-19 05:24:46,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 05:24:46,467 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:46,467 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:46,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:24:46,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:24:46,688 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:46,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:46,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1291780743, now seen corresponding path program 1 times [2023-11-19 05:24:46,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:46,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130766398] [2023-11-19 05:24:46,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:46,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:24:48,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:48,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130766398] [2023-11-19 05:24:48,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130766398] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:24:48,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566921220] [2023-11-19 05:24:48,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:48,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:24:48,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:24:48,043 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:24:48,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:24:49,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:49,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 5404 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 05:24:49,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:24:49,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:24:49,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:24:49,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:24:49,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566921220] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 05:24:49,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:24:49,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 4] total 6 [2023-11-19 05:24:49,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635428850] [2023-11-19 05:24:49,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:49,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:24:49,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:49,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:24:49,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:24:49,674 INFO L87 Difference]: Start difference. First operand 18 states and 29 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:24:50,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:50,137 INFO L93 Difference]: Finished difference Result 25 states and 39 transitions. [2023-11-19 05:24:50,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:24:50,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-19 05:24:50,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:50,139 INFO L225 Difference]: With dead ends: 25 [2023-11-19 05:24:50,139 INFO L226 Difference]: Without dead ends: 19 [2023-11-19 05:24:50,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:24:50,140 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:50,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:24:50,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-19 05:24:50,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-19 05:24:50,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:24:50,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 30 transitions. [2023-11-19 05:24:50,148 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 30 transitions. Word has length 11 [2023-11-19 05:24:50,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:50,148 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 30 transitions. [2023-11-19 05:24:50,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:24:50,149 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 30 transitions. [2023-11-19 05:24:50,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 05:24:50,149 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:50,149 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:50,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:24:50,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:24:50,350 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:50,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:50,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1400233037, now seen corresponding path program 1 times [2023-11-19 05:24:50,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:50,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344648606] [2023-11-19 05:24:50,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:50,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:50,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:24:51,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:51,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344648606] [2023-11-19 05:24:51,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344648606] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:24:51,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552027713] [2023-11-19 05:24:51,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:51,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:24:51,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:24:51,464 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:24:51,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:24:52,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:52,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 5416 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 05:24:52,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:24:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:24:52,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:24:52,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 05:24:52,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552027713] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 05:24:52,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:24:52,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 6 [2023-11-19 05:24:52,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015127203] [2023-11-19 05:24:52,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:52,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:24:52,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:52,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:24:52,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:24:52,863 INFO L87 Difference]: Start difference. First operand 19 states and 30 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:24:53,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:53,110 INFO L93 Difference]: Finished difference Result 33 states and 52 transitions. [2023-11-19 05:24:53,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:24:53,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-19 05:24:53,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:53,111 INFO L225 Difference]: With dead ends: 33 [2023-11-19 05:24:53,111 INFO L226 Difference]: Without dead ends: 20 [2023-11-19 05:24:53,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:24:53,113 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:53,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:24:53,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-19 05:24:53,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-19 05:24:53,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:24:53,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 31 transitions. [2023-11-19 05:24:53,118 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 31 transitions. Word has length 12 [2023-11-19 05:24:53,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:53,119 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 31 transitions. [2023-11-19 05:24:53,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:24:53,119 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 31 transitions. [2023-11-19 05:24:53,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 05:24:53,120 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:53,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:53,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:24:53,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:24:53,332 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:53,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:53,332 INFO L85 PathProgramCache]: Analyzing trace with hash -272759460, now seen corresponding path program 1 times [2023-11-19 05:24:53,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:53,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207925324] [2023-11-19 05:24:53,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:53,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:53,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:54,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 05:24:54,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:54,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207925324] [2023-11-19 05:24:54,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207925324] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:24:54,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007838567] [2023-11-19 05:24:54,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:54,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:24:54,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:24:54,421 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:24:54,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:24:55,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:55,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 5422 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 05:24:55,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:24:55,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 05:24:55,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:24:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:24:55,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007838567] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 05:24:55,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:24:55,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 4] total 7 [2023-11-19 05:24:55,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742238192] [2023-11-19 05:24:55,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:55,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:24:55,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:55,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:24:55,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:24:55,753 INFO L87 Difference]: Start difference. First operand 20 states and 31 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:24:56,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:56,065 INFO L93 Difference]: Finished difference Result 29 states and 44 transitions. [2023-11-19 05:24:56,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:24:56,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-19 05:24:56,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:56,066 INFO L225 Difference]: With dead ends: 29 [2023-11-19 05:24:56,066 INFO L226 Difference]: Without dead ends: 21 [2023-11-19 05:24:56,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:24:56,068 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:56,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:24:56,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-19 05:24:56,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-19 05:24:56,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:24:56,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 32 transitions. [2023-11-19 05:24:56,073 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 32 transitions. Word has length 14 [2023-11-19 05:24:56,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:56,073 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 32 transitions. [2023-11-19 05:24:56,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:24:56,074 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 32 transitions. [2023-11-19 05:24:56,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 05:24:56,074 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:56,074 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:56,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:24:56,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:24:56,275 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:56,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:56,276 INFO L85 PathProgramCache]: Analyzing trace with hash -2063430505, now seen corresponding path program 1 times [2023-11-19 05:24:56,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:56,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702640082] [2023-11-19 05:24:56,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:56,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:24:57,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:57,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702640082] [2023-11-19 05:24:57,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702640082] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:24:57,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740166706] [2023-11-19 05:24:57,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:57,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:24:57,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:24:57,280 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:24:57,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:24:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:58,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 5428 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 05:24:58,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:24:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:24:58,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:24:58,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 05:24:58,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740166706] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 05:24:58,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:24:58,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 4] total 7 [2023-11-19 05:24:58,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291361028] [2023-11-19 05:24:58,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:58,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:24:58,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:58,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:24:58,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:24:58,619 INFO L87 Difference]: Start difference. First operand 21 states and 32 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:24:58,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:58,872 INFO L93 Difference]: Finished difference Result 25 states and 36 transitions. [2023-11-19 05:24:58,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:24:58,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-19 05:24:58,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:58,873 INFO L225 Difference]: With dead ends: 25 [2023-11-19 05:24:58,873 INFO L226 Difference]: Without dead ends: 22 [2023-11-19 05:24:58,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:24:58,875 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:58,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:24:58,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-19 05:24:58,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-19 05:24:58,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:24:58,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2023-11-19 05:24:58,880 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 16 [2023-11-19 05:24:58,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:58,881 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2023-11-19 05:24:58,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:24:58,881 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2023-11-19 05:24:58,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 05:24:58,882 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:58,882 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:58,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:24:59,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:24:59,096 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:59,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:59,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1218805573, now seen corresponding path program 1 times [2023-11-19 05:24:59,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:59,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299191571] [2023-11-19 05:24:59,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:59,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:59,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:00,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 05:25:00,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:25:00,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299191571] [2023-11-19 05:25:00,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299191571] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:25:00,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278611024] [2023-11-19 05:25:00,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:00,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:00,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:25:00,151 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:25:00,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:25:01,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:01,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 5434 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 05:25:01,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:25:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:25:01,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:25:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 05:25:01,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278611024] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 05:25:01,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:25:01,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 5] total 8 [2023-11-19 05:25:01,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333597458] [2023-11-19 05:25:01,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:25:01,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:25:01,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:25:01,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:25:01,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:25:01,553 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:25:01,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:25:01,959 INFO L93 Difference]: Finished difference Result 41 states and 63 transitions. [2023-11-19 05:25:01,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:25:01,962 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-19 05:25:01,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:25:01,963 INFO L225 Difference]: With dead ends: 41 [2023-11-19 05:25:01,963 INFO L226 Difference]: Without dead ends: 23 [2023-11-19 05:25:01,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:25:01,964 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:25:01,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 13 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:25:01,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-19 05:25:01,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-19 05:25:01,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:25:01,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 34 transitions. [2023-11-19 05:25:01,971 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 34 transitions. Word has length 18 [2023-11-19 05:25:01,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:25:01,971 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 34 transitions. [2023-11-19 05:25:01,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:25:01,972 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 34 transitions. [2023-11-19 05:25:01,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 05:25:01,972 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:25:01,973 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:25:02,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 05:25:02,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:02,173 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:25:02,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:25:02,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1859170266, now seen corresponding path program 1 times [2023-11-19 05:25:02,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:25:02,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863197857] [2023-11-19 05:25:02,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:02,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:25:02,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:03,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:25:03,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:25:03,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863197857] [2023-11-19 05:25:03,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863197857] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:25:03,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697790355] [2023-11-19 05:25:03,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:03,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:03,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:25:03,340 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:25:03,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 05:25:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:04,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 5448 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 05:25:04,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:25:04,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:25:04,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:25:04,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:25:04,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697790355] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 05:25:04,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:25:04,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 6] total 10 [2023-11-19 05:25:04,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405147557] [2023-11-19 05:25:04,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:25:04,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:25:04,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:25:04,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:25:04,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:25:04,805 INFO L87 Difference]: Start difference. First operand 23 states and 34 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:25:05,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:25:05,105 INFO L93 Difference]: Finished difference Result 36 states and 54 transitions. [2023-11-19 05:25:05,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:25:05,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-19 05:25:05,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:25:05,106 INFO L225 Difference]: With dead ends: 36 [2023-11-19 05:25:05,106 INFO L226 Difference]: Without dead ends: 24 [2023-11-19 05:25:05,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:25:05,108 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:25:05,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 13 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:25:05,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-19 05:25:05,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-19 05:25:05,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:25:05,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 35 transitions. [2023-11-19 05:25:05,114 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 35 transitions. Word has length 20 [2023-11-19 05:25:05,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:25:05,115 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 35 transitions. [2023-11-19 05:25:05,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:25:05,115 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 35 transitions. [2023-11-19 05:25:05,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-19 05:25:05,116 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:25:05,116 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:25:05,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-19 05:25:05,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c33935-b9ee-4cf0-adb1-5c67777dc364/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:05,317 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:25:05,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:25:05,317 INFO L85 PathProgramCache]: Analyzing trace with hash 902622385, now seen corresponding path program 1 times [2023-11-19 05:25:05,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:25:05,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333699711] [2023-11-19 05:25:05,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:05,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:25:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat