./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 57a0d461468e871620bb6a0a3de7e8bdfa4741915d12326365887ea97e191d16 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:04:13,349 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:04:13,474 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:04:13,481 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:04:13,482 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:04:13,518 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:04:13,519 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:04:13,520 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:04:13,521 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:04:13,526 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:04:13,526 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:04:13,527 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:04:13,527 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:04:13,529 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:04:13,529 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:04:13,530 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:04:13,530 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:04:13,531 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:04:13,532 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:04:13,532 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:04:13,533 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:04:13,533 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:04:13,534 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:04:13,535 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:04:13,536 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:04:13,536 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:04:13,536 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:04:13,537 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:04:13,537 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:04:13,538 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:04:13,539 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:04:13,540 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:04:13,540 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:04:13,540 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:04:13,541 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:04:13,541 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:04:13,541 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:04:13,542 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:04:13,542 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:04:13,542 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:04:13,542 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:04:13,543 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:04:13,543 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:04:13,543 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:04:13,544 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:04:13,544 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_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57a0d461468e871620bb6a0a3de7e8bdfa4741915d12326365887ea97e191d16 [2023-11-19 05:04:13,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:04:13,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:04:13,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:04:13,833 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:04:13,834 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:04:13,836 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-2.c [2023-11-19 05:04:16,937 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:04:17,339 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:04:17,339 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-2.c [2023-11-19 05:04:17,376 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/data/0d60b0ee1/46a9fe9a640f41328b0097dd71d3b1a1/FLAGf87e35057 [2023-11-19 05:04:17,393 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/data/0d60b0ee1/46a9fe9a640f41328b0097dd71d3b1a1 [2023-11-19 05:04:17,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:04:17,401 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:04:17,405 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:04:17,405 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:04:17,410 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:04:17,410 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:04:17" (1/1) ... [2023-11-19 05:04:17,411 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38cf3b9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:17, skipping insertion in model container [2023-11-19 05:04:17,412 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:04:17" (1/1) ... [2023-11-19 05:04:17,480 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:04:17,626 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_3caae49f-66ae-4ec9-b313-f08fd567f3c8/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-2.c[911,924] [2023-11-19 05:04:17,693 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_3caae49f-66ae-4ec9-b313-f08fd567f3c8/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-2.c[8416,8429] [2023-11-19 05:04:17,864 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:04:17,883 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:04:17,895 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_3caae49f-66ae-4ec9-b313-f08fd567f3c8/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-2.c[911,924] [2023-11-19 05:04:17,914 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_3caae49f-66ae-4ec9-b313-f08fd567f3c8/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-2.c[8416,8429] [2023-11-19 05:04:17,964 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:04:17,994 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:04:17,994 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:17 WrapperNode [2023-11-19 05:04:17,995 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:04:17,996 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:04:17,996 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:04:17,996 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:04:18,004 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:17" (1/1) ... [2023-11-19 05:04:18,022 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:17" (1/1) ... [2023-11-19 05:04:18,091 INFO L138 Inliner]: procedures = 79, calls = 97, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 1108 [2023-11-19 05:04:18,092 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:04:18,093 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:04:18,093 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:04:18,093 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:04:18,103 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:17" (1/1) ... [2023-11-19 05:04:18,103 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:17" (1/1) ... [2023-11-19 05:04:18,110 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:17" (1/1) ... [2023-11-19 05:04:18,110 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:17" (1/1) ... [2023-11-19 05:04:18,132 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:17" (1/1) ... [2023-11-19 05:04:18,150 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:17" (1/1) ... [2023-11-19 05:04:18,154 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:17" (1/1) ... [2023-11-19 05:04:18,160 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:17" (1/1) ... [2023-11-19 05:04:18,168 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:04:18,169 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:04:18,169 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:04:18,169 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:04:18,170 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:17" (1/1) ... [2023-11-19 05:04:18,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:04:18,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:18,200 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:04:18,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:04:18,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:04:18,240 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-19 05:04:18,241 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-19 05:04:18,241 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-11-19 05:04:18,241 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-11-19 05:04:18,241 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-19 05:04:18,241 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-19 05:04:18,241 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-19 05:04:18,242 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-19 05:04:18,242 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-11-19 05:04:18,242 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-11-19 05:04:18,242 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-19 05:04:18,242 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-19 05:04:18,242 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-19 05:04:18,243 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-19 05:04:18,243 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-11-19 05:04:18,243 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-11-19 05:04:18,243 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-11-19 05:04:18,243 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-11-19 05:04:18,244 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-11-19 05:04:18,244 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-11-19 05:04:18,244 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-19 05:04:18,244 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-19 05:04:18,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:04:18,244 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-19 05:04:18,245 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-19 05:04:18,245 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-11-19 05:04:18,245 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-11-19 05:04:18,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:04:18,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:04:18,245 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-19 05:04:18,246 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-19 05:04:18,389 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:04:18,392 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:04:19,534 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2023-11-19 05:04:19,534 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2023-11-19 05:04:19,625 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:04:20,354 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:04:20,354 INFO L302 CfgBuilder]: Removed 19 assume(true) statements. [2023-11-19 05:04:20,372 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:04:20 BoogieIcfgContainer [2023-11-19 05:04:20,372 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:04:20,376 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:04:20,376 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:04:20,379 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:04:20,380 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:04:17" (1/3) ... [2023-11-19 05:04:20,380 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f77802a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:04:20, skipping insertion in model container [2023-11-19 05:04:20,381 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:17" (2/3) ... [2023-11-19 05:04:20,383 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f77802a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:04:20, skipping insertion in model container [2023-11-19 05:04:20,383 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:04:20" (3/3) ... [2023-11-19 05:04:20,384 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.12.cil-2.c [2023-11-19 05:04:20,406 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:04:20,407 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 05:04:20,492 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:04:20,498 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;@6b02f15a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:04:20,498 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 05:04:20,507 INFO L276 IsEmpty]: Start isEmpty. Operand has 280 states, 221 states have (on average 1.51131221719457) internal successors, (334), 227 states have internal predecessors, (334), 42 states have call successors, (42), 14 states have call predecessors, (42), 14 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-19 05:04:20,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-19 05:04:20,519 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:20,520 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] [2023-11-19 05:04:20,521 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:20,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:20,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1360789435, now seen corresponding path program 1 times [2023-11-19 05:04:20,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:20,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408894053] [2023-11-19 05:04:20,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:20,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:20,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:04:20,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:20,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408894053] [2023-11-19 05:04:20,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408894053] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:20,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:04:20,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:04:20,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674930517] [2023-11-19 05:04:20,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:21,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:04:21,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:21,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:04:21,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:04:21,054 INFO L87 Difference]: Start difference. First operand has 280 states, 221 states have (on average 1.51131221719457) internal successors, (334), 227 states have internal predecessors, (334), 42 states have call successors, (42), 14 states have call predecessors, (42), 14 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-19 05:04:21,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:21,752 INFO L93 Difference]: Finished difference Result 683 states and 1014 transitions. [2023-11-19 05:04:21,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:04:21,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2023-11-19 05:04:21,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:21,770 INFO L225 Difference]: With dead ends: 683 [2023-11-19 05:04:21,770 INFO L226 Difference]: Without dead ends: 404 [2023-11-19 05:04:21,777 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 [2023-11-19 05:04:21,780 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 470 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:21,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 708 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:04:21,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2023-11-19 05:04:21,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 393. [2023-11-19 05:04:21,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 302 states have (on average 1.4370860927152318) internal successors, (434), 306 states have internal predecessors, (434), 62 states have call successors, (62), 28 states have call predecessors, (62), 27 states have return successors, (63), 60 states have call predecessors, (63), 60 states have call successors, (63) [2023-11-19 05:04:21,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 559 transitions. [2023-11-19 05:04:21,908 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 559 transitions. Word has length 44 [2023-11-19 05:04:21,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:21,909 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 559 transitions. [2023-11-19 05:04:21,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-19 05:04:21,909 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 559 transitions. [2023-11-19 05:04:21,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 05:04:21,912 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:21,913 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] [2023-11-19 05:04:21,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:04:21,913 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:21,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:21,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1674230218, now seen corresponding path program 1 times [2023-11-19 05:04:21,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:21,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994645005] [2023-11-19 05:04:21,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:21,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:21,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:22,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:04:22,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:22,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994645005] [2023-11-19 05:04:22,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994645005] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:22,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:04:22,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:04:22,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418313875] [2023-11-19 05:04:22,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:22,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:04:22,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:22,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:04:22,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:22,061 INFO L87 Difference]: Start difference. First operand 393 states and 559 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-19 05:04:23,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:23,034 INFO L93 Difference]: Finished difference Result 930 states and 1282 transitions. [2023-11-19 05:04:23,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:04:23,035 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2023-11-19 05:04:23,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:23,040 INFO L225 Difference]: With dead ends: 930 [2023-11-19 05:04:23,041 INFO L226 Difference]: Without dead ends: 464 [2023-11-19 05:04:23,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:04:23,044 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 1000 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:23,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1008 Valid, 1167 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 05:04:23,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2023-11-19 05:04:23,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 379. [2023-11-19 05:04:23,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 288 states have (on average 1.3923611111111112) internal successors, (401), 292 states have internal predecessors, (401), 62 states have call successors, (62), 28 states have call predecessors, (62), 27 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-19 05:04:23,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 523 transitions. [2023-11-19 05:04:23,090 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 523 transitions. Word has length 45 [2023-11-19 05:04:23,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:23,090 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 523 transitions. [2023-11-19 05:04:23,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-19 05:04:23,091 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 523 transitions. [2023-11-19 05:04:23,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-19 05:04:23,093 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:23,093 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] [2023-11-19 05:04:23,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:04:23,094 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:23,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:23,095 INFO L85 PathProgramCache]: Analyzing trace with hash -608609942, now seen corresponding path program 1 times [2023-11-19 05:04:23,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:23,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068579313] [2023-11-19 05:04:23,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:23,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:23,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:23,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:04:23,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:23,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068579313] [2023-11-19 05:04:23,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068579313] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:23,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:04:23,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 05:04:23,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369061322] [2023-11-19 05:04:23,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:23,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:04:23,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:23,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:04:23,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:04:23,468 INFO L87 Difference]: Start difference. First operand 379 states and 523 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-19 05:04:24,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:24,597 INFO L93 Difference]: Finished difference Result 681 states and 891 transitions. [2023-11-19 05:04:24,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 05:04:24,598 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2023-11-19 05:04:24,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:24,605 INFO L225 Difference]: With dead ends: 681 [2023-11-19 05:04:24,605 INFO L226 Difference]: Without dead ends: 507 [2023-11-19 05:04:24,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-19 05:04:24,615 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 565 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:24,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 1189 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1160 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 05:04:24,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2023-11-19 05:04:24,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 481. [2023-11-19 05:04:24,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 356 states have (on average 1.3567415730337078) internal successors, (483), 360 states have internal predecessors, (483), 82 states have call successors, (82), 42 states have call predecessors, (82), 41 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-19 05:04:24,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 645 transitions. [2023-11-19 05:04:24,695 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 645 transitions. Word has length 46 [2023-11-19 05:04:24,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:24,696 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 645 transitions. [2023-11-19 05:04:24,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-19 05:04:24,696 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 645 transitions. [2023-11-19 05:04:24,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-19 05:04:24,703 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:24,703 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, 1] [2023-11-19 05:04:24,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:04:24,704 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:24,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:24,705 INFO L85 PathProgramCache]: Analyzing trace with hash 72797285, now seen corresponding path program 1 times [2023-11-19 05:04:24,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:24,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154629334] [2023-11-19 05:04:24,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:24,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:24,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:04:24,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:24,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154629334] [2023-11-19 05:04:24,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154629334] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:24,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:04:24,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:04:24,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187251305] [2023-11-19 05:04:24,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:24,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:04:24,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:24,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:04:24,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:04:24,812 INFO L87 Difference]: Start difference. First operand 481 states and 645 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:04:24,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:24,963 INFO L93 Difference]: Finished difference Result 746 states and 981 transitions. [2023-11-19 05:04:24,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:04:24,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2023-11-19 05:04:24,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:24,967 INFO L225 Difference]: With dead ends: 746 [2023-11-19 05:04:24,967 INFO L226 Difference]: Without dead ends: 200 [2023-11-19 05:04:24,969 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 [2023-11-19 05:04:24,970 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 370 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:24,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 321 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:04:24,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-11-19 05:04:24,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2023-11-19 05:04:24,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 167 states have (on average 1.4850299401197604) internal successors, (248), 168 states have internal predecessors, (248), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-19 05:04:24,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 300 transitions. [2023-11-19 05:04:24,991 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 300 transitions. Word has length 47 [2023-11-19 05:04:24,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:24,992 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 300 transitions. [2023-11-19 05:04:24,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:04:24,992 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 300 transitions. [2023-11-19 05:04:24,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-19 05:04:24,994 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:24,994 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:04:24,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:04:24,994 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:24,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:24,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1210998035, now seen corresponding path program 1 times [2023-11-19 05:04:24,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:24,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647216706] [2023-11-19 05:04:24,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:24,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:25,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:25,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:04:25,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:25,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647216706] [2023-11-19 05:04:25,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647216706] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:25,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:04:25,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:04:25,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671386491] [2023-11-19 05:04:25,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:25,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:04:25,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:25,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:04:25,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:04:25,311 INFO L87 Difference]: Start difference. First operand 200 states and 300 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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) [2023-11-19 05:04:26,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:26,200 INFO L93 Difference]: Finished difference Result 1143 states and 1824 transitions. [2023-11-19 05:04:26,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:04:26,201 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 67 [2023-11-19 05:04:26,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:26,216 INFO L225 Difference]: With dead ends: 1143 [2023-11-19 05:04:26,216 INFO L226 Difference]: Without dead ends: 949 [2023-11-19 05:04:26,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:04:26,221 INFO L413 NwaCegarLoop]: 472 mSDtfsCounter, 1394 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1396 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:26,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1396 Valid, 1299 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 05:04:26,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2023-11-19 05:04:26,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 938. [2023-11-19 05:04:26,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 796 states have (on average 1.484924623115578) internal successors, (1182), 800 states have internal predecessors, (1182), 111 states have call successors, (111), 30 states have call predecessors, (111), 30 states have return successors, (173), 108 states have call predecessors, (173), 111 states have call successors, (173) [2023-11-19 05:04:26,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1466 transitions. [2023-11-19 05:04:26,365 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1466 transitions. Word has length 67 [2023-11-19 05:04:26,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:26,366 INFO L495 AbstractCegarLoop]: Abstraction has 938 states and 1466 transitions. [2023-11-19 05:04:26,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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) [2023-11-19 05:04:26,370 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1466 transitions. [2023-11-19 05:04:26,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-19 05:04:26,375 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:26,376 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, 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:04:26,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:04:26,377 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:26,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:26,378 INFO L85 PathProgramCache]: Analyzing trace with hash -585643167, now seen corresponding path program 1 times [2023-11-19 05:04:26,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:26,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304283938] [2023-11-19 05:04:26,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:26,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:04:26,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:26,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304283938] [2023-11-19 05:04:26,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304283938] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:04:26,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430644176] [2023-11-19 05:04:26,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:26,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:26,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:26,688 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:04:26,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:04:26,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:26,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 1047 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:04:27,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:04:27,084 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-19 05:04:27,084 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:04:27,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430644176] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:27,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:04:27,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:04:27,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215521253] [2023-11-19 05:04:27,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:27,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:04:27,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:27,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:04:27,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:27,087 INFO L87 Difference]: Start difference. First operand 938 states and 1466 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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) [2023-11-19 05:04:27,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:27,375 INFO L93 Difference]: Finished difference Result 2786 states and 4480 transitions. [2023-11-19 05:04:27,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:04:27,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 137 [2023-11-19 05:04:27,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:27,390 INFO L225 Difference]: With dead ends: 2786 [2023-11-19 05:04:27,391 INFO L226 Difference]: Without dead ends: 1854 [2023-11-19 05:04:27,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:27,398 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 269 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:27,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 487 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:04:27,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2023-11-19 05:04:27,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1847. [2023-11-19 05:04:27,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1573 states have (on average 1.4812460267005723) internal successors, (2330), 1580 states have internal predecessors, (2330), 213 states have call successors, (213), 60 states have call predecessors, (213), 60 states have return successors, (333), 207 states have call predecessors, (333), 213 states have call successors, (333) [2023-11-19 05:04:27,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 2876 transitions. [2023-11-19 05:04:27,586 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 2876 transitions. Word has length 137 [2023-11-19 05:04:27,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:27,586 INFO L495 AbstractCegarLoop]: Abstraction has 1847 states and 2876 transitions. [2023-11-19 05:04:27,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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) [2023-11-19 05:04:27,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 2876 transitions. [2023-11-19 05:04:27,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-19 05:04:27,592 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:27,593 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, 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:04:27,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:04:27,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 05:04:27,815 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:27,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:27,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1105242753, now seen corresponding path program 1 times [2023-11-19 05:04:27,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:27,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949922860] [2023-11-19 05:04:27,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:27,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:27,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:28,019 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:04:28,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:28,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949922860] [2023-11-19 05:04:28,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949922860] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:04:28,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962473676] [2023-11-19 05:04:28,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:28,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:28,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:28,022 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:04:28,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:04:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:28,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:04:28,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:04:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-19 05:04:28,383 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:04:28,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962473676] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:28,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:04:28,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:04:28,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031966603] [2023-11-19 05:04:28,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:28,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:04:28,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:28,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:04:28,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:28,387 INFO L87 Difference]: Start difference. First operand 1847 states and 2876 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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) [2023-11-19 05:04:28,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:28,817 INFO L93 Difference]: Finished difference Result 5498 states and 8802 transitions. [2023-11-19 05:04:28,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:04:28,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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 137 [2023-11-19 05:04:28,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:28,853 INFO L225 Difference]: With dead ends: 5498 [2023-11-19 05:04:28,853 INFO L226 Difference]: Without dead ends: 3657 [2023-11-19 05:04:28,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:28,865 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 272 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:28,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 487 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:04:28,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3657 states. [2023-11-19 05:04:29,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3657 to 3645. [2023-11-19 05:04:29,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3645 states, 3112 states have (on average 1.4768637532133677) internal successors, (4596), 3125 states have internal predecessors, (4596), 412 states have call successors, (412), 120 states have call predecessors, (412), 120 states have return successors, (644), 400 states have call predecessors, (644), 412 states have call successors, (644) [2023-11-19 05:04:29,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3645 states to 3645 states and 5652 transitions. [2023-11-19 05:04:29,206 INFO L78 Accepts]: Start accepts. Automaton has 3645 states and 5652 transitions. Word has length 137 [2023-11-19 05:04:29,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:29,206 INFO L495 AbstractCegarLoop]: Abstraction has 3645 states and 5652 transitions. [2023-11-19 05:04:29,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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) [2023-11-19 05:04:29,207 INFO L276 IsEmpty]: Start isEmpty. Operand 3645 states and 5652 transitions. [2023-11-19 05:04:29,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-19 05:04:29,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:29,217 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, 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:04:29,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:04:29,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 05:04:29,433 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:29,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:29,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1383729311, now seen corresponding path program 1 times [2023-11-19 05:04:29,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:29,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180157921] [2023-11-19 05:04:29,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:29,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:29,707 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:04:29,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:29,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180157921] [2023-11-19 05:04:29,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180157921] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:04:29,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604453808] [2023-11-19 05:04:29,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:29,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:29,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:29,709 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:04:29,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:04:29,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:29,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:04:29,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:04:30,058 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 05:04:30,060 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:04:30,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604453808] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:30,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:04:30,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:04:30,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395494981] [2023-11-19 05:04:30,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:30,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:04:30,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:30,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:04:30,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:30,063 INFO L87 Difference]: Start difference. First operand 3645 states and 5652 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 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) [2023-11-19 05:04:30,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:30,722 INFO L93 Difference]: Finished difference Result 10862 states and 17305 transitions. [2023-11-19 05:04:30,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:04:30,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 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 137 [2023-11-19 05:04:30,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:30,779 INFO L225 Difference]: With dead ends: 10862 [2023-11-19 05:04:30,780 INFO L226 Difference]: Without dead ends: 7223 [2023-11-19 05:04:30,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:30,804 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 251 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:30,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 487 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:04:30,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7223 states. [2023-11-19 05:04:31,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7223 to 7201. [2023-11-19 05:04:31,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7201 states, 6160 states have (on average 1.472077922077922) internal successors, (9068), 6185 states have internal predecessors, (9068), 800 states have call successors, (800), 240 states have call predecessors, (800), 240 states have return successors, (1248), 776 states have call predecessors, (1248), 800 states have call successors, (1248) [2023-11-19 05:04:31,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7201 states to 7201 states and 11116 transitions. [2023-11-19 05:04:31,399 INFO L78 Accepts]: Start accepts. Automaton has 7201 states and 11116 transitions. Word has length 137 [2023-11-19 05:04:31,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:31,401 INFO L495 AbstractCegarLoop]: Abstraction has 7201 states and 11116 transitions. [2023-11-19 05:04:31,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 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) [2023-11-19 05:04:31,401 INFO L276 IsEmpty]: Start isEmpty. Operand 7201 states and 11116 transitions. [2023-11-19 05:04:31,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-19 05:04:31,416 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:31,417 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, 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:04:31,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:04:31,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:31,633 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:31,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:31,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1985061247, now seen corresponding path program 1 times [2023-11-19 05:04:31,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:31,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227186276] [2023-11-19 05:04:31,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:31,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:31,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:04:31,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:31,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227186276] [2023-11-19 05:04:31,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227186276] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:04:31,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606280492] [2023-11-19 05:04:31,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:31,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:31,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:31,830 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:04:31,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:04:32,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:32,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:04:32,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:04:32,197 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 05:04:32,198 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:04:32,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606280492] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:32,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:04:32,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:04:32,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630277920] [2023-11-19 05:04:32,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:32,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:04:32,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:32,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:04:32,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:32,201 INFO L87 Difference]: Start difference. First operand 7201 states and 11116 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 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) [2023-11-19 05:04:33,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:33,088 INFO L93 Difference]: Finished difference Result 21470 states and 34029 transitions. [2023-11-19 05:04:33,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:04:33,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 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 137 [2023-11-19 05:04:33,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:33,221 INFO L225 Difference]: With dead ends: 21470 [2023-11-19 05:04:33,221 INFO L226 Difference]: Without dead ends: 14275 [2023-11-19 05:04:33,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:33,263 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 257 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:33,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 487 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:04:33,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14275 states. [2023-11-19 05:04:34,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14275 to 14233. [2023-11-19 05:04:34,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14233 states, 12196 states have (on average 1.4670383732371268) internal successors, (17892), 12245 states have internal predecessors, (17892), 1556 states have call successors, (1556), 480 states have call predecessors, (1556), 480 states have return successors, (2420), 1508 states have call predecessors, (2420), 1556 states have call successors, (2420) [2023-11-19 05:04:34,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14233 states to 14233 states and 21868 transitions. [2023-11-19 05:04:34,501 INFO L78 Accepts]: Start accepts. Automaton has 14233 states and 21868 transitions. Word has length 137 [2023-11-19 05:04:34,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:34,502 INFO L495 AbstractCegarLoop]: Abstraction has 14233 states and 21868 transitions. [2023-11-19 05:04:34,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 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) [2023-11-19 05:04:34,503 INFO L276 IsEmpty]: Start isEmpty. Operand 14233 states and 21868 transitions. [2023-11-19 05:04:34,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-19 05:04:34,535 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:34,535 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, 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:04:34,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:04:34,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:34,756 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:34,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:34,756 INFO L85 PathProgramCache]: Analyzing trace with hash -428544607, now seen corresponding path program 1 times [2023-11-19 05:04:34,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:34,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339287523] [2023-11-19 05:04:34,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:34,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:35,010 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:04:35,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:35,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339287523] [2023-11-19 05:04:35,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339287523] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:04:35,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190747160] [2023-11-19 05:04:35,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:35,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:35,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:35,013 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:04:35,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:04:35,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:35,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 1023 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:04:35,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:04:35,351 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-19 05:04:35,351 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:04:35,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190747160] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:35,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:04:35,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:04:35,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620559760] [2023-11-19 05:04:35,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:35,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:04:35,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:35,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:04:35,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:35,354 INFO L87 Difference]: Start difference. First operand 14233 states and 21868 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 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) [2023-11-19 05:04:37,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:37,163 INFO L93 Difference]: Finished difference Result 42446 states and 66913 transitions. [2023-11-19 05:04:37,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:04:37,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 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 137 [2023-11-19 05:04:37,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:37,331 INFO L225 Difference]: With dead ends: 42446 [2023-11-19 05:04:37,331 INFO L226 Difference]: Without dead ends: 28219 [2023-11-19 05:04:37,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:37,407 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 263 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:37,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 487 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:04:37,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28219 states. [2023-11-19 05:04:39,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28219 to 28137. [2023-11-19 05:04:39,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28137 states, 24148 states have (on average 1.46181878416432) internal successors, (35300), 24245 states have internal predecessors, (35300), 3028 states have call successors, (3028), 960 states have call predecessors, (3028), 960 states have return successors, (4692), 2932 states have call predecessors, (4692), 3028 states have call successors, (4692) [2023-11-19 05:04:39,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28137 states to 28137 states and 43020 transitions. [2023-11-19 05:04:39,628 INFO L78 Accepts]: Start accepts. Automaton has 28137 states and 43020 transitions. Word has length 137 [2023-11-19 05:04:39,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:39,629 INFO L495 AbstractCegarLoop]: Abstraction has 28137 states and 43020 transitions. [2023-11-19 05:04:39,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 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) [2023-11-19 05:04:39,629 INFO L276 IsEmpty]: Start isEmpty. Operand 28137 states and 43020 transitions. [2023-11-19 05:04:39,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-19 05:04:39,680 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:39,680 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, 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:04:39,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:04:39,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 05:04:39,897 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:39,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:39,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1318823105, now seen corresponding path program 1 times [2023-11-19 05:04:39,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:39,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062541023] [2023-11-19 05:04:39,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:39,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:40,127 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:04:40,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:40,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062541023] [2023-11-19 05:04:40,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062541023] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:04:40,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909860933] [2023-11-19 05:04:40,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:40,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:40,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:40,130 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:04:40,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:04:40,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:40,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:04:40,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:04:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 05:04:40,474 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:04:40,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909860933] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:40,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:04:40,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:04:40,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133089172] [2023-11-19 05:04:40,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:40,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:04:40,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:40,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:04:40,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:40,477 INFO L87 Difference]: Start difference. First operand 28137 states and 43020 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 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) [2023-11-19 05:04:43,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:43,327 INFO L93 Difference]: Finished difference Result 83918 states and 131553 transitions. [2023-11-19 05:04:43,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:04:43,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 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 137 [2023-11-19 05:04:43,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:43,730 INFO L225 Difference]: With dead ends: 83918 [2023-11-19 05:04:43,731 INFO L226 Difference]: Without dead ends: 55787 [2023-11-19 05:04:43,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:43,806 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 248 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:43,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 487 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:04:43,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55787 states. [2023-11-19 05:04:46,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55787 to 55625. [2023-11-19 05:04:47,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55625 states, 47812 states have (on average 1.4564544465824478) internal successors, (69636), 48005 states have internal predecessors, (69636), 5892 states have call successors, (5892), 1920 states have call predecessors, (5892), 1920 states have return successors, (9092), 5700 states have call predecessors, (9092), 5892 states have call successors, (9092) [2023-11-19 05:04:47,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55625 states to 55625 states and 84620 transitions. [2023-11-19 05:04:47,619 INFO L78 Accepts]: Start accepts. Automaton has 55625 states and 84620 transitions. Word has length 137 [2023-11-19 05:04:47,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:47,620 INFO L495 AbstractCegarLoop]: Abstraction has 55625 states and 84620 transitions. [2023-11-19 05:04:47,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 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) [2023-11-19 05:04:47,620 INFO L276 IsEmpty]: Start isEmpty. Operand 55625 states and 84620 transitions. [2023-11-19 05:04:47,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-19 05:04:47,731 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:47,731 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, 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:04:47,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 05:04:47,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3caae49f-66ae-4ec9-b313-f08fd567f3c8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 05:04:47,955 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:47,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:47,956 INFO L85 PathProgramCache]: Analyzing trace with hash 671191457, now seen corresponding path program 1 times [2023-11-19 05:04:47,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:47,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002407687] [2023-11-19 05:04:47,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:47,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:48,907 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-11-19 05:04:48,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:48,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002407687] [2023-11-19 05:04:48,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002407687] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:48,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:04:48,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:04:48,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197344289] [2023-11-19 05:04:48,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:48,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:04:48,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:48,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:04:48,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:48,911 INFO L87 Difference]: Start difference. First operand 55625 states and 84620 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-19 05:04:54,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:54,318 INFO L93 Difference]: Finished difference Result 149709 states and 230030 transitions. [2023-11-19 05:04:54,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 05:04:54,319 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 137 [2023-11-19 05:04:54,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:55,013 INFO L225 Difference]: With dead ends: 149709 [2023-11-19 05:04:55,014 INFO L226 Difference]: Without dead ends: 94091 [2023-11-19 05:04:55,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-19 05:04:55,175 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 793 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:55,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [800 Valid, 848 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:04:55,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94091 states.