./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label44+token_ring.05.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label44+token_ring.05.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire --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 806c9058928482f755246f30ce94bbbe3c870162d7ccdd45454f74a5441d158a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:11:18,134 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:11:18,255 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:11:18,262 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:11:18,263 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:11:18,302 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:11:18,303 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:11:18,303 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:11:18,304 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:11:18,310 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:11:18,310 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:11:18,311 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:11:18,311 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:11:18,313 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:11:18,314 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:11:18,314 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:11:18,315 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:11:18,315 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:11:18,316 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:11:18,316 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:11:18,317 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:11:18,319 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:11:18,320 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:11:18,321 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:11:18,321 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:11:18,322 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:11:18,322 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:11:18,323 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:11:18,323 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:11:18,324 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:11:18,325 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:11:18,325 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:11:18,326 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:11:18,326 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:11:18,326 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:11:18,327 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:11:18,327 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:11:18,327 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:11:18,328 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:11:18,328 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:11:18,329 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:11:18,329 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:11:18,330 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:11:18,330 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:11:18,331 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:11:18,331 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:11:18,331 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:11:18,331 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_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 806c9058928482f755246f30ce94bbbe3c870162d7ccdd45454f74a5441d158a [2023-11-23 21:11:18,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:11:18,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:11:18,660 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:11:18,663 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:11:18,663 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:11:18,665 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/combinations/Problem05_label44+token_ring.05.cil-1.c [2023-11-23 21:11:21,912 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:11:22,698 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:11:22,699 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/sv-benchmarks/c/combinations/Problem05_label44+token_ring.05.cil-1.c [2023-11-23 21:11:22,773 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/data/d7467e2d8/84020a73e963482cb65c804ebd5d1a7e/FLAGf8712aa45 [2023-11-23 21:11:22,789 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/data/d7467e2d8/84020a73e963482cb65c804ebd5d1a7e [2023-11-23 21:11:22,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:11:22,794 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:11:22,795 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:11:22,796 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:11:22,801 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:11:22,802 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:11:22" (1/1) ... [2023-11-23 21:11:22,803 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cfe75d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:22, skipping insertion in model container [2023-11-23 21:11:22,804 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:11:22" (1/1) ... [2023-11-23 21:11:23,173 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:11:25,431 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_7b51bd5a-279a-4471-96b0-dcaf6984e775/sv-benchmarks/c/combinations/Problem05_label44+token_ring.05.cil-1.c[377340,377353] [2023-11-23 21:11:25,468 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_7b51bd5a-279a-4471-96b0-dcaf6984e775/sv-benchmarks/c/combinations/Problem05_label44+token_ring.05.cil-1.c[383339,383352] [2023-11-23 21:11:25,699 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:11:25,713 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:11:26,954 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_7b51bd5a-279a-4471-96b0-dcaf6984e775/sv-benchmarks/c/combinations/Problem05_label44+token_ring.05.cil-1.c[377340,377353] [2023-11-23 21:11:26,964 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_7b51bd5a-279a-4471-96b0-dcaf6984e775/sv-benchmarks/c/combinations/Problem05_label44+token_ring.05.cil-1.c[383339,383352] [2023-11-23 21:11:26,997 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:11:27,082 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:11:27,083 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:27 WrapperNode [2023-11-23 21:11:27,083 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:11:27,084 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:11:27,085 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:11:27,085 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:11:27,092 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:27" (1/1) ... [2023-11-23 21:11:27,209 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:27" (1/1) ... [2023-11-23 21:11:27,715 INFO L138 Inliner]: procedures = 54, calls = 56, calls flagged for inlining = 32, calls inlined = 32, statements flattened = 12808 [2023-11-23 21:11:27,716 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:11:27,717 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:11:27,717 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:11:27,717 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:11:27,727 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:27" (1/1) ... [2023-11-23 21:11:27,727 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:27" (1/1) ... [2023-11-23 21:11:27,979 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:27" (1/1) ... [2023-11-23 21:11:27,980 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:27" (1/1) ... [2023-11-23 21:11:28,291 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:27" (1/1) ... [2023-11-23 21:11:28,491 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:27" (1/1) ... [2023-11-23 21:11:28,534 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:27" (1/1) ... [2023-11-23 21:11:28,560 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:27" (1/1) ... [2023-11-23 21:11:28,634 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:11:28,636 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:11:28,636 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:11:28,636 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:11:28,637 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:27" (1/1) ... [2023-11-23 21:11:28,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:11:28,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:11:28,676 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:11:28,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:11:28,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:11:28,730 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-23 21:11:28,730 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-23 21:11:28,730 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-23 21:11:28,731 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-23 21:11:28,731 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-23 21:11:28,731 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-23 21:11:28,731 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-23 21:11:28,731 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-23 21:11:28,731 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-23 21:11:28,732 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-23 21:11:28,732 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-23 21:11:28,732 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-23 21:11:28,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:11:28,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:11:28,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:11:28,859 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:11:28,861 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:11:38,017 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:11:40,814 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:11:40,815 INFO L309 CfgBuilder]: Removed 9 assume(true) statements. [2023-11-23 21:11:40,818 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:11:40 BoogieIcfgContainer [2023-11-23 21:11:40,819 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:11:40,822 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:11:40,823 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:11:40,826 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:11:40,827 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:11:22" (1/3) ... [2023-11-23 21:11:40,829 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31ff826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:11:40, skipping insertion in model container [2023-11-23 21:11:40,829 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:27" (2/3) ... [2023-11-23 21:11:40,830 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31ff826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:11:40, skipping insertion in model container [2023-11-23 21:11:40,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:11:40" (3/3) ... [2023-11-23 21:11:40,832 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label44+token_ring.05.cil-1.c [2023-11-23 21:11:40,853 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:11:40,853 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 21:11:40,955 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:11:40,965 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;@4d720eac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:11:40,965 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 21:11:40,978 INFO L276 IsEmpty]: Start isEmpty. Operand has 1760 states, 1732 states have (on average 1.9670900692840647) internal successors, (3407), 1735 states have internal predecessors, (3407), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-23 21:11:40,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-23 21:11:40,994 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:40,995 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:40,995 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:41,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:41,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1689456560, now seen corresponding path program 1 times [2023-11-23 21:11:41,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:41,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777281047] [2023-11-23 21:11:41,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:41,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:41,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:41,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:11:41,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:41,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777281047] [2023-11-23 21:11:41,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777281047] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:41,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:41,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:11:41,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034568835] [2023-11-23 21:11:41,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:41,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:11:41,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:41,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:11:41,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:11:41,550 INFO L87 Difference]: Start difference. First operand has 1760 states, 1732 states have (on average 1.9670900692840647) internal successors, (3407), 1735 states have internal predecessors, (3407), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:11:42,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:42,546 INFO L93 Difference]: Finished difference Result 3620 states and 7053 transitions. [2023-11-23 21:11:42,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:11:42,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2023-11-23 21:11:42,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:42,579 INFO L225 Difference]: With dead ends: 3620 [2023-11-23 21:11:42,579 INFO L226 Difference]: Without dead ends: 1859 [2023-11-23 21:11:42,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:11:42,595 INFO L413 NwaCegarLoop]: 3313 mSDtfsCounter, 3560 mSDsluCounter, 3243 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3560 SdHoareTripleChecker+Valid, 6556 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:42,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3560 Valid, 6556 Invalid, 628 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 21:11:42,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2023-11-23 21:11:42,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 1858. [2023-11-23 21:11:42,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1810 states have (on average 1.938121546961326) internal successors, (3508), 1813 states have internal predecessors, (3508), 34 states have call successors, (34), 12 states have call predecessors, (34), 12 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-23 21:11:42,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 3576 transitions. [2023-11-23 21:11:42,745 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 3576 transitions. Word has length 46 [2023-11-23 21:11:42,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:42,746 INFO L495 AbstractCegarLoop]: Abstraction has 1858 states and 3576 transitions. [2023-11-23 21:11:42,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:11:42,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 3576 transitions. [2023-11-23 21:11:42,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-23 21:11:42,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:42,753 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:42,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:11:42,754 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:42,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:42,755 INFO L85 PathProgramCache]: Analyzing trace with hash 691839025, now seen corresponding path program 1 times [2023-11-23 21:11:42,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:42,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446615043] [2023-11-23 21:11:42,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:42,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:43,094 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:11:43,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:43,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446615043] [2023-11-23 21:11:43,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446615043] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:11:43,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092558608] [2023-11-23 21:11:43,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:43,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:11:43,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:11:43,103 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:11:43,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:11:43,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:43,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:11:43,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:11:43,395 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 21:11:43,396 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:11:43,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092558608] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:43,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:11:43,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 21:11:43,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133953763] [2023-11-23 21:11:43,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:43,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:11:43,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:43,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:11:43,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:11:43,403 INFO L87 Difference]: Start difference. First operand 1858 states and 3576 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:11:43,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:43,896 INFO L93 Difference]: Finished difference Result 2275 states and 4181 transitions. [2023-11-23 21:11:43,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:11:43,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2023-11-23 21:11:43,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:43,914 INFO L225 Difference]: With dead ends: 2275 [2023-11-23 21:11:43,914 INFO L226 Difference]: Without dead ends: 2063 [2023-11-23 21:11:43,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:11:43,918 INFO L413 NwaCegarLoop]: 3229 mSDtfsCounter, 3405 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3405 SdHoareTripleChecker+Valid, 3355 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:43,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3405 Valid, 3355 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:11:43,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2023-11-23 21:11:43,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 2059. [2023-11-23 21:11:43,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2059 states, 1971 states have (on average 1.8939624556062913) internal successors, (3733), 1975 states have internal predecessors, (3733), 62 states have call successors, (62), 24 states have call predecessors, (62), 24 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-23 21:11:44,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 3857 transitions. [2023-11-23 21:11:44,005 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 3857 transitions. Word has length 88 [2023-11-23 21:11:44,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:44,006 INFO L495 AbstractCegarLoop]: Abstraction has 2059 states and 3857 transitions. [2023-11-23 21:11:44,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:11:44,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 3857 transitions. [2023-11-23 21:11:44,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-23 21:11:44,011 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:44,011 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:44,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 21:11:44,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:11:44,233 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:44,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:44,233 INFO L85 PathProgramCache]: Analyzing trace with hash -846340625, now seen corresponding path program 1 times [2023-11-23 21:11:44,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:44,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495774916] [2023-11-23 21:11:44,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:44,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:44,528 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:11:44,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:44,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495774916] [2023-11-23 21:11:44,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495774916] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:11:44,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321274148] [2023-11-23 21:11:44,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:44,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:11:44,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:11:44,534 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:11:44,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:11:44,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:44,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:11:44,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:11:44,769 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:11:44,769 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:11:44,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321274148] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:44,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:11:44,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 21:11:44,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770641057] [2023-11-23 21:11:44,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:44,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:11:44,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:44,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:11:44,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:11:44,773 INFO L87 Difference]: Start difference. First operand 2059 states and 3857 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:11:45,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:45,407 INFO L93 Difference]: Finished difference Result 2872 states and 5028 transitions. [2023-11-23 21:11:45,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:11:45,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2023-11-23 21:11:45,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:45,428 INFO L225 Difference]: With dead ends: 2872 [2023-11-23 21:11:45,428 INFO L226 Difference]: Without dead ends: 2459 [2023-11-23 21:11:45,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:11:45,434 INFO L413 NwaCegarLoop]: 3208 mSDtfsCounter, 3399 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3399 SdHoareTripleChecker+Valid, 3334 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:45,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3399 Valid, 3334 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:11:45,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2023-11-23 21:11:45,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2453. [2023-11-23 21:11:45,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2287 states have (on average 1.8237866200262352) internal successors, (4171), 2293 states have internal predecessors, (4171), 116 states have call successors, (116), 48 states have call predecessors, (116), 48 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2023-11-23 21:11:45,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 4403 transitions. [2023-11-23 21:11:45,560 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 4403 transitions. Word has length 88 [2023-11-23 21:11:45,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:45,562 INFO L495 AbstractCegarLoop]: Abstraction has 2453 states and 4403 transitions. [2023-11-23 21:11:45,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:11:45,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 4403 transitions. [2023-11-23 21:11:45,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-23 21:11:45,569 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:45,569 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:45,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:11:45,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:11:45,796 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:45,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:45,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1612169773, now seen corresponding path program 1 times [2023-11-23 21:11:45,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:45,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067543332] [2023-11-23 21:11:45,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:45,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:45,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:45,936 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:11:45,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:45,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067543332] [2023-11-23 21:11:45,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067543332] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:11:45,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869277108] [2023-11-23 21:11:45,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:45,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:11:45,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:11:45,941 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:11:45,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:11:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:46,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:11:46,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:11:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-23 21:11:46,138 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:11:46,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869277108] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:46,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:11:46,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 21:11:46,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611298688] [2023-11-23 21:11:46,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:46,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:11:46,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:46,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:11:46,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:11:46,141 INFO L87 Difference]: Start difference. First operand 2453 states and 4403 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:11:46,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:46,671 INFO L93 Difference]: Finished difference Result 4042 states and 6672 transitions. [2023-11-23 21:11:46,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:11:46,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2023-11-23 21:11:46,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:46,695 INFO L225 Difference]: With dead ends: 4042 [2023-11-23 21:11:46,695 INFO L226 Difference]: Without dead ends: 3235 [2023-11-23 21:11:46,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:11:46,701 INFO L413 NwaCegarLoop]: 3225 mSDtfsCounter, 3408 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3408 SdHoareTripleChecker+Valid, 3351 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:46,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3408 Valid, 3351 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:11:46,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3235 states. [2023-11-23 21:11:46,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3235 to 3225. [2023-11-23 21:11:46,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3225 states, 2907 states have (on average 1.7278981768145856) internal successors, (5023), 2917 states have internal predecessors, (5023), 220 states have call successors, (220), 96 states have call predecessors, (220), 96 states have return successors, (220), 212 states have call predecessors, (220), 220 states have call successors, (220) [2023-11-23 21:11:46,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3225 states to 3225 states and 5463 transitions. [2023-11-23 21:11:46,855 INFO L78 Accepts]: Start accepts. Automaton has 3225 states and 5463 transitions. Word has length 88 [2023-11-23 21:11:46,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:46,856 INFO L495 AbstractCegarLoop]: Abstraction has 3225 states and 5463 transitions. [2023-11-23 21:11:46,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:11:46,857 INFO L276 IsEmpty]: Start isEmpty. Operand 3225 states and 5463 transitions. [2023-11-23 21:11:46,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-23 21:11:46,863 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:46,863 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:46,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:11:47,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:11:47,083 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:47,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:47,084 INFO L85 PathProgramCache]: Analyzing trace with hash 708297647, now seen corresponding path program 1 times [2023-11-23 21:11:47,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:47,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320773126] [2023-11-23 21:11:47,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:47,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:47,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:47,196 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-23 21:11:47,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:47,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320773126] [2023-11-23 21:11:47,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320773126] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:47,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:47,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:11:47,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615851908] [2023-11-23 21:11:47,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:47,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:11:47,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:47,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:11:47,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:11:47,205 INFO L87 Difference]: Start difference. First operand 3225 states and 5463 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:11:47,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:47,850 INFO L93 Difference]: Finished difference Result 4475 states and 7240 transitions. [2023-11-23 21:11:47,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:11:47,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 88 [2023-11-23 21:11:47,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:47,885 INFO L225 Difference]: With dead ends: 4475 [2023-11-23 21:11:47,885 INFO L226 Difference]: Without dead ends: 3665 [2023-11-23 21:11:47,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:11:47,891 INFO L413 NwaCegarLoop]: 3264 mSDtfsCounter, 69 mSDsluCounter, 3196 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 6460 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:47,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 6460 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:11:47,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3665 states. [2023-11-23 21:11:48,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3665 to 3517. [2023-11-23 21:11:48,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3517 states, 3183 states have (on average 1.7137920201068175) internal successors, (5455), 3193 states have internal predecessors, (5455), 228 states have call successors, (228), 104 states have call predecessors, (228), 104 states have return successors, (228), 220 states have call predecessors, (228), 228 states have call successors, (228) [2023-11-23 21:11:48,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3517 states to 3517 states and 5911 transitions. [2023-11-23 21:11:48,060 INFO L78 Accepts]: Start accepts. Automaton has 3517 states and 5911 transitions. Word has length 88 [2023-11-23 21:11:48,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:48,062 INFO L495 AbstractCegarLoop]: Abstraction has 3517 states and 5911 transitions. [2023-11-23 21:11:48,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:11:48,063 INFO L276 IsEmpty]: Start isEmpty. Operand 3517 states and 5911 transitions. [2023-11-23 21:11:48,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-23 21:11:48,075 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:48,075 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:48,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:11:48,076 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:48,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:48,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1456602959, now seen corresponding path program 1 times [2023-11-23 21:11:48,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:48,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353055153] [2023-11-23 21:11:48,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:48,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:48,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-23 21:11:48,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:48,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353055153] [2023-11-23 21:11:48,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353055153] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:48,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:48,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:11:48,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274759770] [2023-11-23 21:11:48,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:48,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:11:48,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:48,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:11:48,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:11:48,183 INFO L87 Difference]: Start difference. First operand 3517 states and 5911 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 21:11:48,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:48,777 INFO L93 Difference]: Finished difference Result 7186 states and 11156 transitions. [2023-11-23 21:11:48,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:11:48,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 118 [2023-11-23 21:11:48,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:48,816 INFO L225 Difference]: With dead ends: 7186 [2023-11-23 21:11:48,816 INFO L226 Difference]: Without dead ends: 5315 [2023-11-23 21:11:48,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:11:48,826 INFO L413 NwaCegarLoop]: 3192 mSDtfsCounter, 3398 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3398 SdHoareTripleChecker+Valid, 3318 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:48,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3398 Valid, 3318 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:11:48,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5315 states. [2023-11-23 21:11:49,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5315 to 5289. [2023-11-23 21:11:49,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5289 states, 4643 states have (on average 1.6108119750161534) internal successors, (7479), 4661 states have internal predecessors, (7479), 436 states have call successors, (436), 208 states have call predecessors, (436), 208 states have return successors, (436), 420 states have call predecessors, (436), 436 states have call successors, (436) [2023-11-23 21:11:49,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5289 states to 5289 states and 8351 transitions. [2023-11-23 21:11:49,302 INFO L78 Accepts]: Start accepts. Automaton has 5289 states and 8351 transitions. Word has length 118 [2023-11-23 21:11:49,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:49,303 INFO L495 AbstractCegarLoop]: Abstraction has 5289 states and 8351 transitions. [2023-11-23 21:11:49,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 21:11:49,304 INFO L276 IsEmpty]: Start isEmpty. Operand 5289 states and 8351 transitions. [2023-11-23 21:11:49,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-23 21:11:49,320 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:49,320 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:49,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:11:49,322 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:49,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:49,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1001478482, now seen corresponding path program 1 times [2023-11-23 21:11:49,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:49,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039724343] [2023-11-23 21:11:49,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:49,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:49,430 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-23 21:11:49,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:49,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039724343] [2023-11-23 21:11:49,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039724343] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:49,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:49,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:11:49,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337870850] [2023-11-23 21:11:49,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:49,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:11:49,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:49,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:11:49,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:11:49,434 INFO L87 Difference]: Start difference. First operand 5289 states and 8351 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 21:11:50,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:50,247 INFO L93 Difference]: Finished difference Result 12430 states and 18436 transitions. [2023-11-23 21:11:50,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:11:50,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 118 [2023-11-23 21:11:50,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:50,308 INFO L225 Difference]: With dead ends: 12430 [2023-11-23 21:11:50,308 INFO L226 Difference]: Without dead ends: 8787 [2023-11-23 21:11:50,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:11:50,326 INFO L413 NwaCegarLoop]: 3210 mSDtfsCounter, 3401 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3401 SdHoareTripleChecker+Valid, 3336 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:50,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3401 Valid, 3336 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:11:50,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8787 states. [2023-11-23 21:11:50,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8787 to 8737. [2023-11-23 21:11:50,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8737 states, 7483 states have (on average 1.5190431645062141) internal successors, (11367), 7517 states have internal predecessors, (11367), 836 states have call successors, (836), 416 states have call predecessors, (836), 416 states have return successors, (836), 804 states have call predecessors, (836), 836 states have call successors, (836) [2023-11-23 21:11:50,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8737 states to 8737 states and 13039 transitions. [2023-11-23 21:11:50,847 INFO L78 Accepts]: Start accepts. Automaton has 8737 states and 13039 transitions. Word has length 118 [2023-11-23 21:11:50,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:50,848 INFO L495 AbstractCegarLoop]: Abstraction has 8737 states and 13039 transitions. [2023-11-23 21:11:50,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 21:11:50,849 INFO L276 IsEmpty]: Start isEmpty. Operand 8737 states and 13039 transitions. [2023-11-23 21:11:50,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-23 21:11:50,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:50,881 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:50,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:11:50,882 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:50,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:50,882 INFO L85 PathProgramCache]: Analyzing trace with hash -837455646, now seen corresponding path program 1 times [2023-11-23 21:11:50,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:50,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661861031] [2023-11-23 21:11:50,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:50,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:51,082 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-23 21:11:51,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:51,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661861031] [2023-11-23 21:11:51,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661861031] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:11:51,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177585503] [2023-11-23 21:11:51,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:51,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:11:51,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:11:51,088 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:11:51,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:11:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:51,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:11:51,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:11:51,341 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-23 21:11:51,342 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:11:51,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177585503] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:51,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:11:51,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-23 21:11:51,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635882391] [2023-11-23 21:11:51,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:51,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:11:51,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:51,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:11:51,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:11:51,345 INFO L87 Difference]: Start difference. First operand 8737 states and 13039 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-23 21:11:52,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:52,310 INFO L93 Difference]: Finished difference Result 15093 states and 21969 transitions. [2023-11-23 21:11:52,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:11:52,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 138 [2023-11-23 21:11:52,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:52,351 INFO L225 Difference]: With dead ends: 15093 [2023-11-23 21:11:52,351 INFO L226 Difference]: Without dead ends: 11475 [2023-11-23 21:11:52,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:11:52,365 INFO L413 NwaCegarLoop]: 3287 mSDtfsCounter, 100 mSDsluCounter, 3197 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 6484 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:52,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 6484 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:11:52,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11475 states. [2023-11-23 21:11:52,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11475 to 10241. [2023-11-23 21:11:52,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10241 states, 8891 states have (on average 1.5196265886851872) internal successors, (13511), 8925 states have internal predecessors, (13511), 884 states have call successors, (884), 464 states have call predecessors, (884), 464 states have return successors, (884), 852 states have call predecessors, (884), 884 states have call successors, (884) [2023-11-23 21:11:52,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10241 states to 10241 states and 15279 transitions. [2023-11-23 21:11:52,861 INFO L78 Accepts]: Start accepts. Automaton has 10241 states and 15279 transitions. Word has length 138 [2023-11-23 21:11:52,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:52,862 INFO L495 AbstractCegarLoop]: Abstraction has 10241 states and 15279 transitions. [2023-11-23 21:11:52,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-23 21:11:52,863 INFO L276 IsEmpty]: Start isEmpty. Operand 10241 states and 15279 transitions. [2023-11-23 21:11:52,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-23 21:11:52,896 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:52,896 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:52,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:11:53,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:11:53,118 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:53,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:53,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1457598979, now seen corresponding path program 2 times [2023-11-23 21:11:53,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:53,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587679479] [2023-11-23 21:11:53,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:53,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:53,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:53,506 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-23 21:11:53,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:53,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587679479] [2023-11-23 21:11:53,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587679479] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:11:53,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139555661] [2023-11-23 21:11:53,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:11:53,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:11:53,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:11:53,508 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:11:53,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:11:53,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 21:11:53,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:11:53,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:11:53,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:11:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-11-23 21:11:54,000 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:11:54,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139555661] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:54,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:11:54,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2023-11-23 21:11:54,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860371656] [2023-11-23 21:11:54,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:54,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:11:54,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:54,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:11:54,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:11:54,003 INFO L87 Difference]: Start difference. First operand 10241 states and 15279 transitions. Second operand has 6 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-23 21:11:55,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:55,448 INFO L93 Difference]: Finished difference Result 16355 states and 23920 transitions. [2023-11-23 21:11:55,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:11:55,449 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 138 [2023-11-23 21:11:55,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:55,484 INFO L225 Difference]: With dead ends: 16355 [2023-11-23 21:11:55,485 INFO L226 Difference]: Without dead ends: 11233 [2023-11-23 21:11:55,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:11:55,499 INFO L413 NwaCegarLoop]: 3144 mSDtfsCounter, 3466 mSDsluCounter, 6245 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3476 SdHoareTripleChecker+Valid, 9389 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:55,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3476 Valid, 9389 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 21:11:55,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11233 states. [2023-11-23 21:11:55,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11233 to 11089. [2023-11-23 21:11:55,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11089 states, 9643 states have (on average 1.49735559473193) internal successors, (14439), 9677 states have internal predecessors, (14439), 916 states have call successors, (916), 528 states have call predecessors, (916), 528 states have return successors, (916), 884 states have call predecessors, (916), 916 states have call successors, (916) [2023-11-23 21:11:55,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11089 states to 11089 states and 16271 transitions. [2023-11-23 21:11:55,996 INFO L78 Accepts]: Start accepts. Automaton has 11089 states and 16271 transitions. Word has length 138 [2023-11-23 21:11:55,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:55,997 INFO L495 AbstractCegarLoop]: Abstraction has 11089 states and 16271 transitions. [2023-11-23 21:11:55,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-23 21:11:55,997 INFO L276 IsEmpty]: Start isEmpty. Operand 11089 states and 16271 transitions. [2023-11-23 21:11:56,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-23 21:11:56,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:56,032 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:56,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:11:56,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:11:56,255 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:56,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:56,256 INFO L85 PathProgramCache]: Analyzing trace with hash 491860579, now seen corresponding path program 1 times [2023-11-23 21:11:56,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:56,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313741721] [2023-11-23 21:11:56,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:56,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-23 21:11:56,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:56,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313741721] [2023-11-23 21:11:56,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313741721] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:11:56,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29433657] [2023-11-23 21:11:56,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:56,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:11:56,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:11:56,591 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:11:56,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:11:56,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:56,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:11:56,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:11:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-23 21:11:56,837 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:11:56,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29433657] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:56,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:11:56,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-23 21:11:56,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365223718] [2023-11-23 21:11:56,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:56,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:11:56,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:56,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:11:56,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:11:56,842 INFO L87 Difference]: Start difference. First operand 11089 states and 16271 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-23 21:11:57,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:57,785 INFO L93 Difference]: Finished difference Result 15973 states and 23305 transitions. [2023-11-23 21:11:57,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:11:57,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 138 [2023-11-23 21:11:57,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:57,832 INFO L225 Difference]: With dead ends: 15973 [2023-11-23 21:11:57,832 INFO L226 Difference]: Without dead ends: 11123 [2023-11-23 21:11:57,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:11:57,856 INFO L413 NwaCegarLoop]: 3292 mSDtfsCounter, 126 mSDsluCounter, 3184 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 6476 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:57,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 6476 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:11:57,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11123 states. [2023-11-23 21:11:58,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11123 to 11009. [2023-11-23 21:11:58,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11009 states, 9563 states have (on average 1.481438879012862) internal successors, (14167), 9597 states have internal predecessors, (14167), 916 states have call successors, (916), 528 states have call predecessors, (916), 528 states have return successors, (916), 884 states have call predecessors, (916), 916 states have call successors, (916) [2023-11-23 21:11:58,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11009 states to 11009 states and 15999 transitions. [2023-11-23 21:11:58,560 INFO L78 Accepts]: Start accepts. Automaton has 11009 states and 15999 transitions. Word has length 138 [2023-11-23 21:11:58,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:58,561 INFO L495 AbstractCegarLoop]: Abstraction has 11009 states and 15999 transitions. [2023-11-23 21:11:58,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-23 21:11:58,561 INFO L276 IsEmpty]: Start isEmpty. Operand 11009 states and 15999 transitions. [2023-11-23 21:11:58,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-23 21:11:58,599 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:58,599 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:58,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:11:58,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 21:11:58,815 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:58,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:58,815 INFO L85 PathProgramCache]: Analyzing trace with hash 230605315, now seen corresponding path program 1 times [2023-11-23 21:11:58,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:58,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678870065] [2023-11-23 21:11:58,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:58,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:59,118 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-23 21:11:59,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:59,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678870065] [2023-11-23 21:11:59,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678870065] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:11:59,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009072805] [2023-11-23 21:11:59,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:59,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:11:59,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:11:59,121 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:11:59,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 21:11:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:59,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:11:59,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:11:59,348 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-23 21:11:59,348 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:11:59,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009072805] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:59,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:11:59,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-23 21:11:59,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757526863] [2023-11-23 21:11:59,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:59,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:11:59,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:59,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:11:59,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:11:59,352 INFO L87 Difference]: Start difference. First operand 11009 states and 15999 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-23 21:12:00,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:00,299 INFO L93 Difference]: Finished difference Result 17391 states and 24532 transitions. [2023-11-23 21:12:00,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:12:00,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 138 [2023-11-23 21:12:00,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:00,344 INFO L225 Difference]: With dead ends: 17391 [2023-11-23 21:12:00,344 INFO L226 Difference]: Without dead ends: 12661 [2023-11-23 21:12:00,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:12:00,361 INFO L413 NwaCegarLoop]: 3208 mSDtfsCounter, 3406 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3406 SdHoareTripleChecker+Valid, 3241 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:00,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3406 Valid, 3241 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:12:00,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12661 states. [2023-11-23 21:12:00,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12661 to 12661. [2023-11-23 21:12:00,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12661 states, 11031 states have (on average 1.439126099175052) internal successors, (15875), 11065 states have internal predecessors, (15875), 976 states have call successors, (976), 652 states have call predecessors, (976), 652 states have return successors, (976), 944 states have call predecessors, (976), 976 states have call successors, (976) [2023-11-23 21:12:00,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12661 states to 12661 states and 17827 transitions. [2023-11-23 21:12:00,927 INFO L78 Accepts]: Start accepts. Automaton has 12661 states and 17827 transitions. Word has length 138 [2023-11-23 21:12:00,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:00,927 INFO L495 AbstractCegarLoop]: Abstraction has 12661 states and 17827 transitions. [2023-11-23 21:12:00,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-23 21:12:00,928 INFO L276 IsEmpty]: Start isEmpty. Operand 12661 states and 17827 transitions. [2023-11-23 21:12:00,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-23 21:12:00,958 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:00,958 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:00,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 21:12:01,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:12:01,179 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:01,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:01,180 INFO L85 PathProgramCache]: Analyzing trace with hash 878470952, now seen corresponding path program 1 times [2023-11-23 21:12:01,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:01,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445617205] [2023-11-23 21:12:01,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:01,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:01,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:01,320 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-23 21:12:01,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:01,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445617205] [2023-11-23 21:12:01,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445617205] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:12:01,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552148967] [2023-11-23 21:12:01,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:01,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:12:01,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:12:01,322 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:12:01,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b51bd5a-279a-4471-96b0-dcaf6984e775/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 21:12:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:01,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:12:01,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:12:01,533 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-23 21:12:01,533 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:12:01,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552148967] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:01,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:12:01,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-23 21:12:01,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38474880] [2023-11-23 21:12:01,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:01,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:12:01,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:01,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:12:01,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:12:01,536 INFO L87 Difference]: Start difference. First operand 12661 states and 17827 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-23 21:12:02,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:02,547 INFO L93 Difference]: Finished difference Result 21933 states and 30453 transitions. [2023-11-23 21:12:02,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:12:02,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 134 [2023-11-23 21:12:02,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted.