./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh --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 284334fdd31c4c26d16d0bf558a458f462d11a8d54419841fe6fc9cdbb9a1cfc --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:58:50,158 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:58:50,220 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 16:58:50,226 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:58:50,226 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:58:50,248 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:58:50,249 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:58:50,250 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:58:50,250 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:58:50,251 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:58:50,251 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:58:50,252 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:58:50,252 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:58:50,253 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:58:50,253 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:58:50,254 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:58:50,254 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:58:50,255 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:58:50,255 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:58:50,255 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:58:50,256 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:58:50,256 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:58:50,257 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:58:50,258 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:58:50,258 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 16:58:50,258 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:58:50,259 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 16:58:50,259 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:58:50,259 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:58:50,260 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:58:50,260 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:58:50,260 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 16:58:50,261 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:58:50,261 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:58:50,261 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:58:50,261 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:58:50,261 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:58:50,262 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:58:50,262 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:58:50,262 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:58:50,262 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:58:50,262 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:58:50,263 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:58:50,263 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:58:50,263 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:58:50,263 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:58:50,263 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:58:50,263 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_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 284334fdd31c4c26d16d0bf558a458f462d11a8d54419841fe6fc9cdbb9a1cfc [2023-12-02 16:58:50,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:58:50,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:58:50,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:58:50,531 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:58:50,531 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:58:50,533 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c [2023-12-02 16:58:53,829 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:58:54,013 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:58:54,014 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c [2023-12-02 16:58:54,028 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/data/e650ca4b0/e6c37d1c87a7428c9725564d7be4184e/FLAGdeb153ea2 [2023-12-02 16:58:54,040 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/data/e650ca4b0/e6c37d1c87a7428c9725564d7be4184e [2023-12-02 16:58:54,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:58:54,044 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:58:54,045 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:58:54,045 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:58:54,049 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:58:54,050 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:58:54" (1/1) ... [2023-12-02 16:58:54,051 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ec16d9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:58:54, skipping insertion in model container [2023-12-02 16:58:54,051 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:58:54" (1/1) ... [2023-12-02 16:58:54,095 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:58:54,223 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_d82a62d6-ee2e-4381-ada1-be5b36bfac24/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c[914,927] [2023-12-02 16:58:54,274 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_d82a62d6-ee2e-4381-ada1-be5b36bfac24/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c[7115,7128] [2023-12-02 16:58:54,330 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:58:54,342 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:58:54,352 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_d82a62d6-ee2e-4381-ada1-be5b36bfac24/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c[914,927] [2023-12-02 16:58:54,374 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_d82a62d6-ee2e-4381-ada1-be5b36bfac24/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c[7115,7128] [2023-12-02 16:58:54,407 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:58:54,429 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:58:54,429 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:58:54 WrapperNode [2023-12-02 16:58:54,430 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:58:54,430 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:58:54,431 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:58:54,431 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:58:54,437 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:58:54" (1/1) ... [2023-12-02 16:58:54,450 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:58:54" (1/1) ... [2023-12-02 16:58:54,484 INFO L138 Inliner]: procedures = 61, calls = 69, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 590 [2023-12-02 16:58:54,485 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:58:54,485 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:58:54,485 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:58:54,485 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:58:54,492 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:58:54" (1/1) ... [2023-12-02 16:58:54,492 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:58:54" (1/1) ... [2023-12-02 16:58:54,496 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:58:54" (1/1) ... [2023-12-02 16:58:54,497 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:58:54" (1/1) ... [2023-12-02 16:58:54,505 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:58:54" (1/1) ... [2023-12-02 16:58:54,513 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:58:54" (1/1) ... [2023-12-02 16:58:54,516 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:58:54" (1/1) ... [2023-12-02 16:58:54,518 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:58:54" (1/1) ... [2023-12-02 16:58:54,522 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:58:54,523 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:58:54,523 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:58:54,524 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:58:54,524 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:58:54" (1/1) ... [2023-12-02 16:58:54,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:58:54,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:58:54,555 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:58:54,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:58:54,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:58:54,591 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 16:58:54,591 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 16:58:54,591 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-12-02 16:58:54,591 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-12-02 16:58:54,591 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-12-02 16:58:54,592 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-12-02 16:58:54,592 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-12-02 16:58:54,592 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-12-02 16:58:54,592 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-12-02 16:58:54,592 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-12-02 16:58:54,592 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-12-02 16:58:54,592 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-12-02 16:58:54,593 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-12-02 16:58:54,593 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-12-02 16:58:54,593 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-12-02 16:58:54,593 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-12-02 16:58:54,593 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-12-02 16:58:54,593 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-12-02 16:58:54,594 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-12-02 16:58:54,594 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-12-02 16:58:54,594 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-12-02 16:58:54,594 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-12-02 16:58:54,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:58:54,594 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-12-02 16:58:54,594 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-12-02 16:58:54,595 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-12-02 16:58:54,595 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-12-02 16:58:54,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:58:54,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:58:54,595 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-12-02 16:58:54,595 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-12-02 16:58:54,705 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:58:54,708 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:58:55,254 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:58:55,476 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:58:55,477 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-12-02 16:58:55,478 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:58:55 BoogieIcfgContainer [2023-12-02 16:58:55,478 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:58:55,480 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:58:55,480 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:58:55,483 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:58:55,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:58:54" (1/3) ... [2023-12-02 16:58:55,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79c541cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:58:55, skipping insertion in model container [2023-12-02 16:58:55,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:58:54" (2/3) ... [2023-12-02 16:58:55,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79c541cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:58:55, skipping insertion in model container [2023-12-02 16:58:55,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:58:55" (3/3) ... [2023-12-02 16:58:55,485 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.04.cil-1.c [2023-12-02 16:58:55,499 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:58:55,500 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 16:58:55,544 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:58:55,549 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;@24c91fab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:58:55,549 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 16:58:55,554 INFO L276 IsEmpty]: Start isEmpty. Operand has 177 states, 128 states have (on average 1.484375) internal successors, (190), 134 states have internal predecessors, (190), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2023-12-02 16:58:55,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 16:58:55,564 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:58:55,564 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] [2023-12-02 16:58:55,565 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:58:55,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:58:55,569 INFO L85 PathProgramCache]: Analyzing trace with hash -352473902, now seen corresponding path program 1 times [2023-12-02 16:58:55,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:58:55,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152462799] [2023-12-02 16:58:55,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:58:55,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:58:55,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:58:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:58:55,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:58:55,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152462799] [2023-12-02 16:58:55,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152462799] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:58:55,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:58:55,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:58:55,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012273160] [2023-12-02 16:58:55,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:58:55,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:58:55,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:58:55,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:58:55,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:58:55,947 INFO L87 Difference]: Start difference. First operand has 177 states, 128 states have (on average 1.484375) internal successors, (190), 134 states have internal predecessors, (190), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2023-12-02 16:58:56,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:58:56,378 INFO L93 Difference]: Finished difference Result 405 states and 579 transitions. [2023-12-02 16:58:56,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:58:56,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 45 [2023-12-02 16:58:56,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:58:56,393 INFO L225 Difference]: With dead ends: 405 [2023-12-02 16:58:56,393 INFO L226 Difference]: Without dead ends: 232 [2023-12-02 16:58:56,398 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 [2023-12-02 16:58:56,402 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 302 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:58:56,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 434 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:58:56,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-12-02 16:58:56,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 225. [2023-12-02 16:58:56,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 163 states have (on average 1.3680981595092025) internal successors, (223), 167 states have internal predecessors, (223), 40 states have call successors, (40), 21 states have call predecessors, (40), 20 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2023-12-02 16:58:56,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 301 transitions. [2023-12-02 16:58:56,479 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 301 transitions. Word has length 45 [2023-12-02 16:58:56,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:58:56,480 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 301 transitions. [2023-12-02 16:58:56,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2023-12-02 16:58:56,481 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 301 transitions. [2023-12-02 16:58:56,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 16:58:56,485 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:58:56,485 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] [2023-12-02 16:58:56,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 16:58:56,486 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:58:56,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:58:56,487 INFO L85 PathProgramCache]: Analyzing trace with hash 566500721, now seen corresponding path program 1 times [2023-12-02 16:58:56,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:58:56,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793716111] [2023-12-02 16:58:56,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:58:56,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:58:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:58:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:58:56,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:58:56,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793716111] [2023-12-02 16:58:56,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793716111] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:58:56,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:58:56,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 16:58:56,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762894265] [2023-12-02 16:58:56,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:58:56,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:58:56,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:58:56,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:58:56,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:58:56,859 INFO L87 Difference]: Start difference. First operand 225 states and 301 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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) [2023-12-02 16:58:57,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:58:57,810 INFO L93 Difference]: Finished difference Result 406 states and 522 transitions. [2023-12-02 16:58:57,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 16:58:57,811 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 45 [2023-12-02 16:58:57,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:58:57,817 INFO L225 Difference]: With dead ends: 406 [2023-12-02 16:58:57,817 INFO L226 Difference]: Without dead ends: 290 [2023-12-02 16:58:57,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-12-02 16:58:57,821 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 362 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 16:58:57,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 721 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 16:58:57,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-12-02 16:58:57,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 277. [2023-12-02 16:58:57,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 200 states have (on average 1.35) internal successors, (270), 204 states have internal predecessors, (270), 48 states have call successors, (48), 28 states have call predecessors, (48), 27 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2023-12-02 16:58:57,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 364 transitions. [2023-12-02 16:58:57,895 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 364 transitions. Word has length 45 [2023-12-02 16:58:57,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:58:57,896 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 364 transitions. [2023-12-02 16:58:57,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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) [2023-12-02 16:58:57,897 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 364 transitions. [2023-12-02 16:58:57,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 16:58:57,900 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:58:57,900 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] [2023-12-02 16:58:57,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 16:58:57,901 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:58:57,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:58:57,902 INFO L85 PathProgramCache]: Analyzing trace with hash 570125105, now seen corresponding path program 1 times [2023-12-02 16:58:57,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:58:57,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606353695] [2023-12-02 16:58:57,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:58:57,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:58:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:58:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:58:57,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:58:57,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606353695] [2023-12-02 16:58:57,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606353695] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:58:57,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:58:57,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:58:57,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897658369] [2023-12-02 16:58:57,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:58:57,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:58:57,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:58:57,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:58:57,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:58:57,964 INFO L87 Difference]: Start difference. First operand 277 states and 364 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2023-12-02 16:58:58,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:58:58,101 INFO L93 Difference]: Finished difference Result 605 states and 770 transitions. [2023-12-02 16:58:58,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:58:58,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 46 [2023-12-02 16:58:58,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:58:58,107 INFO L225 Difference]: With dead ends: 605 [2023-12-02 16:58:58,107 INFO L226 Difference]: Without dead ends: 436 [2023-12-02 16:58:58,109 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 [2023-12-02 16:58:58,111 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 213 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:58:58,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 260 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:58:58,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2023-12-02 16:58:58,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 417. [2023-12-02 16:58:58,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 295 states have (on average 1.2881355932203389) internal successors, (380), 299 states have internal predecessors, (380), 72 states have call successors, (72), 49 states have call predecessors, (72), 48 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2023-12-02 16:58:58,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 522 transitions. [2023-12-02 16:58:58,168 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 522 transitions. Word has length 46 [2023-12-02 16:58:58,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:58:58,169 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 522 transitions. [2023-12-02 16:58:58,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2023-12-02 16:58:58,169 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 522 transitions. [2023-12-02 16:58:58,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 16:58:58,172 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:58:58,172 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] [2023-12-02 16:58:58,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 16:58:58,173 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:58:58,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:58:58,173 INFO L85 PathProgramCache]: Analyzing trace with hash 310157375, now seen corresponding path program 1 times [2023-12-02 16:58:58,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:58:58,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090928265] [2023-12-02 16:58:58,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:58:58,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:58:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:58:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:58:58,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:58:58,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090928265] [2023-12-02 16:58:58,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090928265] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:58:58,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:58:58,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:58:58,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203659429] [2023-12-02 16:58:58,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:58:58,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:58:58,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:58:58,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:58:58,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:58:58,288 INFO L87 Difference]: Start difference. First operand 417 states and 522 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2023-12-02 16:58:58,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:58:58,999 INFO L93 Difference]: Finished difference Result 880 states and 1230 transitions. [2023-12-02 16:58:59,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:58:59,000 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 43 [2023-12-02 16:58:59,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:58:59,007 INFO L225 Difference]: With dead ends: 880 [2023-12-02 16:58:59,007 INFO L226 Difference]: Without dead ends: 782 [2023-12-02 16:58:59,008 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 [2023-12-02 16:58:59,010 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 727 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 16:58:59,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 697 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 16:58:59,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2023-12-02 16:58:59,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 771. [2023-12-02 16:58:59,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 572 states have (on average 1.3461538461538463) internal successors, (770), 579 states have internal predecessors, (770), 125 states have call successors, (125), 73 states have call predecessors, (125), 72 states have return successors, (153), 120 states have call predecessors, (153), 123 states have call successors, (153) [2023-12-02 16:58:59,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1048 transitions. [2023-12-02 16:58:59,086 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1048 transitions. Word has length 43 [2023-12-02 16:58:59,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:58:59,086 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 1048 transitions. [2023-12-02 16:58:59,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2023-12-02 16:58:59,087 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1048 transitions. [2023-12-02 16:58:59,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 16:58:59,089 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:58:59,089 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] [2023-12-02 16:58:59,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 16:58:59,089 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:58:59,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:58:59,090 INFO L85 PathProgramCache]: Analyzing trace with hash 522827354, now seen corresponding path program 1 times [2023-12-02 16:58:59,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:58:59,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725999038] [2023-12-02 16:58:59,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:58:59,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:58:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:58:59,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:58:59,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:58:59,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725999038] [2023-12-02 16:58:59,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725999038] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:58:59,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:58:59,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:58:59,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926147334] [2023-12-02 16:58:59,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:58:59,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:58:59,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:58:59,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:58:59,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:58:59,133 INFO L87 Difference]: Start difference. First operand 771 states and 1048 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) [2023-12-02 16:58:59,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:58:59,273 INFO L93 Difference]: Finished difference Result 1141 states and 1493 transitions. [2023-12-02 16:58:59,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:58:59,273 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 [2023-12-02 16:58:59,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:58:59,280 INFO L225 Difference]: With dead ends: 1141 [2023-12-02 16:58:59,280 INFO L226 Difference]: Without dead ends: 878 [2023-12-02 16:58:59,282 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 [2023-12-02 16:58:59,283 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 67 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:58:59,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 381 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:58:59,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2023-12-02 16:58:59,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 872. [2023-12-02 16:58:59,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 643 states have (on average 1.3343701399688959) internal successors, (858), 650 states have internal predecessors, (858), 141 states have call successors, (141), 87 states have call predecessors, (141), 86 states have return successors, (169), 136 states have call predecessors, (169), 139 states have call successors, (169) [2023-12-02 16:58:59,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1168 transitions. [2023-12-02 16:58:59,378 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1168 transitions. Word has length 47 [2023-12-02 16:58:59,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:58:59,379 INFO L495 AbstractCegarLoop]: Abstraction has 872 states and 1168 transitions. [2023-12-02 16:58:59,379 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) [2023-12-02 16:58:59,380 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1168 transitions. [2023-12-02 16:58:59,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-02 16:58:59,381 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:58:59,381 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:58:59,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 16:58:59,382 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:58:59,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:58:59,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1708679736, now seen corresponding path program 1 times [2023-12-02 16:58:59,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:58:59,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501073588] [2023-12-02 16:58:59,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:58:59,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:58:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:58:59,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:58:59,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:58:59,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501073588] [2023-12-02 16:58:59,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501073588] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:58:59,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:58:59,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:58:59,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298784928] [2023-12-02 16:58:59,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:58:59,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:58:59,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:58:59,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:58:59,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:58:59,459 INFO L87 Difference]: Start difference. First operand 872 states and 1168 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-02 16:58:59,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:58:59,791 INFO L93 Difference]: Finished difference Result 979 states and 1294 transitions. [2023-12-02 16:58:59,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:58:59,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2023-12-02 16:58:59,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:58:59,800 INFO L225 Difference]: With dead ends: 979 [2023-12-02 16:58:59,800 INFO L226 Difference]: Without dead ends: 976 [2023-12-02 16:58:59,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:58:59,803 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 386 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:58:59,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 243 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:58:59,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2023-12-02 16:58:59,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 871. [2023-12-02 16:58:59,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 643 states have (on average 1.3297045101088647) internal successors, (855), 649 states have internal predecessors, (855), 140 states have call successors, (140), 87 states have call predecessors, (140), 86 states have return successors, (169), 136 states have call predecessors, (169), 139 states have call successors, (169) [2023-12-02 16:58:59,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1164 transitions. [2023-12-02 16:58:59,918 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1164 transitions. Word has length 54 [2023-12-02 16:58:59,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:58:59,919 INFO L495 AbstractCegarLoop]: Abstraction has 871 states and 1164 transitions. [2023-12-02 16:58:59,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-02 16:58:59,920 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1164 transitions. [2023-12-02 16:58:59,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 16:58:59,922 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:58:59,922 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:58:59,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 16:58:59,923 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:58:59,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:58:59,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1428612675, now seen corresponding path program 1 times [2023-12-02 16:58:59,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:58:59,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675059011] [2023-12-02 16:58:59,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:58:59,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:58:59,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:59:00,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:00,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675059011] [2023-12-02 16:59:00,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675059011] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:59:00,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734922254] [2023-12-02 16:59:00,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:00,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:00,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:59:00,112 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:59:00,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 16:59:00,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:00,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 16:59:00,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:59:00,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:59:00,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:59:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:59:00,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734922254] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:59:00,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1585851513] [2023-12-02 16:59:00,704 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-12-02 16:59:00,704 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:59:00,709 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:59:00,715 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:59:00,716 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:59:04,424 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 131 for LOIs [2023-12-02 16:59:04,467 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 127 for LOIs [2023-12-02 16:59:04,509 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 135 for LOIs [2023-12-02 16:59:05,104 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 131 for LOIs [2023-12-02 16:59:05,263 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 131 for LOIs [2023-12-02 16:59:05,386 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 131 for LOIs [2023-12-02 16:59:05,430 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 138 for LOIs [2023-12-02 16:59:05,474 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:59:16,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1585851513] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:59:16,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:59:16,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [5, 5, 4] total 41 [2023-12-02 16:59:16,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014756768] [2023-12-02 16:59:16,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:59:16,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-02 16:59:16,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:16,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-02 16:59:16,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 16:59:16,568 INFO L87 Difference]: Start difference. First operand 871 states and 1164 transitions. Second operand has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 16:59:33,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:33,990 INFO L93 Difference]: Finished difference Result 1328 states and 1697 transitions. [2023-12-02 16:59:33,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-02 16:59:33,990 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2023-12-02 16:59:33,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:33,995 INFO L225 Difference]: With dead ends: 1328 [2023-12-02 16:59:33,995 INFO L226 Difference]: Without dead ends: 920 [2023-12-02 16:59:33,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=601, Invalid=4091, Unknown=0, NotChecked=0, Total=4692 [2023-12-02 16:59:33,998 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 167 mSDsluCounter, 1826 mSDsCounter, 0 mSdLazyCounter, 3878 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 1997 SdHoareTripleChecker+Invalid, 4014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 3878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:59:33,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 1997 Invalid, 4014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 3878 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-12-02 16:59:34,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2023-12-02 16:59:34,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 905. [2023-12-02 16:59:34,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 669 states have (on average 1.3198804185351272) internal successors, (883), 675 states have internal predecessors, (883), 142 states have call successors, (142), 93 states have call predecessors, (142), 92 states have return successors, (171), 138 states have call predecessors, (171), 141 states have call successors, (171) [2023-12-02 16:59:34,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1196 transitions. [2023-12-02 16:59:34,137 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1196 transitions. Word has length 55 [2023-12-02 16:59:34,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:34,138 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1196 transitions. [2023-12-02 16:59:34,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 16:59:34,138 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1196 transitions. [2023-12-02 16:59:34,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-02 16:59:34,140 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:34,140 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 16:59:34,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 16:59:34,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:34,341 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:59:34,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:34,342 INFO L85 PathProgramCache]: Analyzing trace with hash -218227862, now seen corresponding path program 1 times [2023-12-02 16:59:34,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:34,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830601492] [2023-12-02 16:59:34,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:34,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:59:34,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:34,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830601492] [2023-12-02 16:59:34,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830601492] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:59:34,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:59:34,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:59:34,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123338559] [2023-12-02 16:59:34,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:59:34,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:59:34,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:34,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:59:34,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:59:34,401 INFO L87 Difference]: Start difference. First operand 905 states and 1196 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 16:59:34,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:34,589 INFO L93 Difference]: Finished difference Result 1352 states and 1732 transitions. [2023-12-02 16:59:34,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:59:34,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2023-12-02 16:59:34,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:34,597 INFO L225 Difference]: With dead ends: 1352 [2023-12-02 16:59:34,597 INFO L226 Difference]: Without dead ends: 1086 [2023-12-02 16:59:34,598 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 [2023-12-02 16:59:34,599 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 43 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:59:34,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 432 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:59:34,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2023-12-02 16:59:34,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 957. [2023-12-02 16:59:34,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 711 states have (on average 1.3164556962025316) internal successors, (936), 717 states have internal predecessors, (936), 147 states have call successors, (147), 98 states have call predecessors, (147), 97 states have return successors, (176), 143 states have call predecessors, (176), 146 states have call successors, (176) [2023-12-02 16:59:34,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1259 transitions. [2023-12-02 16:59:34,718 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1259 transitions. Word has length 61 [2023-12-02 16:59:34,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:34,718 INFO L495 AbstractCegarLoop]: Abstraction has 957 states and 1259 transitions. [2023-12-02 16:59:34,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 16:59:34,718 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1259 transitions. [2023-12-02 16:59:34,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-02 16:59:34,720 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:34,720 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:59:34,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 16:59:34,720 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:59:34,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:34,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1988249287, now seen corresponding path program 1 times [2023-12-02 16:59:34,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:34,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10636319] [2023-12-02 16:59:34,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:34,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:34,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:59:34,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:34,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10636319] [2023-12-02 16:59:34,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10636319] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:59:34,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:59:34,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 16:59:34,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178368496] [2023-12-02 16:59:34,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:59:34,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:59:34,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:34,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:59:34,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:59:34,886 INFO L87 Difference]: Start difference. First operand 957 states and 1259 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 16:59:35,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:35,511 INFO L93 Difference]: Finished difference Result 1631 states and 2046 transitions. [2023-12-02 16:59:35,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 16:59:35,511 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 63 [2023-12-02 16:59:35,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:35,518 INFO L225 Difference]: With dead ends: 1631 [2023-12-02 16:59:35,518 INFO L226 Difference]: Without dead ends: 1218 [2023-12-02 16:59:35,519 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 [2023-12-02 16:59:35,520 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 345 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:59:35,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 679 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:59:35,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2023-12-02 16:59:35,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1183. [2023-12-02 16:59:35,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 862 states have (on average 1.2865429234338748) internal successors, (1109), 868 states have internal predecessors, (1109), 187 states have call successors, (187), 133 states have call predecessors, (187), 132 states have return successors, (216), 183 states have call predecessors, (216), 186 states have call successors, (216) [2023-12-02 16:59:35,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1512 transitions. [2023-12-02 16:59:35,618 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1512 transitions. Word has length 63 [2023-12-02 16:59:35,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:35,618 INFO L495 AbstractCegarLoop]: Abstraction has 1183 states and 1512 transitions. [2023-12-02 16:59:35,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 16:59:35,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1512 transitions. [2023-12-02 16:59:35,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-02 16:59:35,620 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:35,620 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:59:35,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 16:59:35,620 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:59:35,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:35,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1823158506, now seen corresponding path program 1 times [2023-12-02 16:59:35,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:35,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279457746] [2023-12-02 16:59:35,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:35,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:59:35,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:35,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279457746] [2023-12-02 16:59:35,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279457746] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:59:35,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476741673] [2023-12-02 16:59:35,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:35,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:35,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:59:35,724 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:59:35,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 16:59:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:35,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 16:59:35,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:59:36,019 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:59:36,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:59:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:59:36,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476741673] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:59:36,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1683605574] [2023-12-02 16:59:36,094 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-12-02 16:59:36,095 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:59:36,095 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:59:36,095 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:59:36,096 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:59:40,736 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 131 for LOIs [2023-12-02 16:59:40,780 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 59 for LOIs [2023-12-02 16:59:40,795 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2023-12-02 16:59:40,798 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 135 for LOIs [2023-12-02 16:59:41,392 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 131 for LOIs [2023-12-02 16:59:41,518 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 131 for LOIs [2023-12-02 16:59:41,643 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 131 for LOIs [2023-12-02 16:59:41,690 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 138 for LOIs [2023-12-02 16:59:41,737 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:59:49,734 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21249#(and (= ~q_req_up~0 1) (exists ((|v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_3| Int) (v_~q_free~0_44 Int)) (and (<= v_~q_free~0_44 1) (not (= ~p_dw_st~0 0)) (<= 0 ~p_dw_pc~0) (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_3| 1) (not (= v_~q_free~0_44 1)))) (= ~q_free~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_3| Int)) (and (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_3| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_3| 2147483648)) (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_3| 0)))) (= ~c_last_read~0 ~q_buf_0~0) (= ~c_dr_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (= ~c_dr_st~0 1))' at error location [2023-12-02 16:59:49,734 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:59:49,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:59:49,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-12-02 16:59:49,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579382790] [2023-12-02 16:59:49,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:59:49,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:59:49,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:49,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:59:49,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1902, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 16:59:49,737 INFO L87 Difference]: Start difference. First operand 1183 states and 1512 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-12-02 16:59:50,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:50,309 INFO L93 Difference]: Finished difference Result 2689 states and 3275 transitions. [2023-12-02 16:59:50,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:59:50,309 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2023-12-02 16:59:50,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:50,325 INFO L225 Difference]: With dead ends: 2689 [2023-12-02 16:59:50,326 INFO L226 Difference]: Without dead ends: 2686 [2023-12-02 16:59:50,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=260, Invalid=1902, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 16:59:50,329 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 617 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:59:50,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 720 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:59:50,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2023-12-02 16:59:50,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 1906. [2023-12-02 16:59:50,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1363 states have (on average 1.2626559060895084) internal successors, (1721), 1369 states have internal predecessors, (1721), 305 states have call successors, (305), 237 states have call predecessors, (305), 236 states have return successors, (334), 301 states have call predecessors, (334), 304 states have call successors, (334) [2023-12-02 16:59:50,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 2360 transitions. [2023-12-02 16:59:50,594 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 2360 transitions. Word has length 64 [2023-12-02 16:59:50,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:50,594 INFO L495 AbstractCegarLoop]: Abstraction has 1906 states and 2360 transitions. [2023-12-02 16:59:50,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-12-02 16:59:50,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 2360 transitions. [2023-12-02 16:59:50,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-02 16:59:50,596 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:50,597 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:59:50,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 16:59:50,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:50,797 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:59:50,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:50,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1848670593, now seen corresponding path program 2 times [2023-12-02 16:59:50,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:50,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809242031] [2023-12-02 16:59:50,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:50,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:50,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:50,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:59:50,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:50,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809242031] [2023-12-02 16:59:50,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809242031] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:59:50,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:59:50,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:59:50,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728757872] [2023-12-02 16:59:50,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:59:50,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:59:50,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:50,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:59:50,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:59:50,846 INFO L87 Difference]: Start difference. First operand 1906 states and 2360 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 16:59:51,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:51,086 INFO L93 Difference]: Finished difference Result 2662 states and 3246 transitions. [2023-12-02 16:59:51,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:59:51,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2023-12-02 16:59:51,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:51,095 INFO L225 Difference]: With dead ends: 2662 [2023-12-02 16:59:51,096 INFO L226 Difference]: Without dead ends: 1496 [2023-12-02 16:59:51,099 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 [2023-12-02 16:59:51,100 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 211 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:59:51,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 309 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:59:51,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2023-12-02 16:59:51,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1489. [2023-12-02 16:59:51,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1074 states have (on average 1.2597765363128492) internal successors, (1353), 1080 states have internal predecessors, (1353), 237 states have call successors, (237), 177 states have call predecessors, (237), 176 states have return successors, (266), 233 states have call predecessors, (266), 236 states have call successors, (266) [2023-12-02 16:59:51,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 1856 transitions. [2023-12-02 16:59:51,335 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 1856 transitions. Word has length 67 [2023-12-02 16:59:51,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:51,335 INFO L495 AbstractCegarLoop]: Abstraction has 1489 states and 1856 transitions. [2023-12-02 16:59:51,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 16:59:51,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 1856 transitions. [2023-12-02 16:59:51,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-02 16:59:51,338 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:51,338 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:59:51,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 16:59:51,339 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:59:51,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:51,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1225300371, now seen corresponding path program 1 times [2023-12-02 16:59:51,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:51,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994474803] [2023-12-02 16:59:51,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:51,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:51,397 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:59:51,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:51,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994474803] [2023-12-02 16:59:51,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994474803] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:59:51,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:59:51,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:59:51,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303864750] [2023-12-02 16:59:51,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:59:51,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:59:51,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:51,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:59:51,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:59:51,399 INFO L87 Difference]: Start difference. First operand 1489 states and 1856 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 16:59:51,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:51,651 INFO L93 Difference]: Finished difference Result 2461 states and 2984 transitions. [2023-12-02 16:59:51,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:59:51,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2023-12-02 16:59:51,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:51,660 INFO L225 Difference]: With dead ends: 2461 [2023-12-02 16:59:51,660 INFO L226 Difference]: Without dead ends: 1665 [2023-12-02 16:59:51,663 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 [2023-12-02 16:59:51,663 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 38 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:59:51,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 423 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:59:51,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2023-12-02 16:59:51,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1536. [2023-12-02 16:59:51,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1113 states have (on average 1.2605570530098833) internal successors, (1403), 1119 states have internal predecessors, (1403), 241 states have call successors, (241), 181 states have call predecessors, (241), 180 states have return successors, (270), 237 states have call predecessors, (270), 240 states have call successors, (270) [2023-12-02 16:59:51,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 1914 transitions. [2023-12-02 16:59:51,853 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 1914 transitions. Word has length 71 [2023-12-02 16:59:51,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:51,853 INFO L495 AbstractCegarLoop]: Abstraction has 1536 states and 1914 transitions. [2023-12-02 16:59:51,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 16:59:51,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 1914 transitions. [2023-12-02 16:59:51,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-02 16:59:51,857 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:51,857 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:59:51,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 16:59:51,857 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:59:51,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:51,858 INFO L85 PathProgramCache]: Analyzing trace with hash -776047554, now seen corresponding path program 1 times [2023-12-02 16:59:51,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:51,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24012914] [2023-12-02 16:59:51,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:51,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:51,969 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 16:59:51,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:51,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24012914] [2023-12-02 16:59:51,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24012914] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:59:51,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158130250] [2023-12-02 16:59:51,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:51,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:51,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:59:51,971 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:59:51,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 16:59:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:52,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:59:52,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:59:52,163 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 16:59:52,163 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:59:52,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158130250] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:59:52,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:59:52,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 16:59:52,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200894032] [2023-12-02 16:59:52,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:59:52,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:59:52,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:52,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:59:52,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:59:52,165 INFO L87 Difference]: Start difference. First operand 1536 states and 1914 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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) [2023-12-02 16:59:52,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:52,446 INFO L93 Difference]: Finished difference Result 2424 states and 3272 transitions. [2023-12-02 16:59:52,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:59:52,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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 81 [2023-12-02 16:59:52,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:52,456 INFO L225 Difference]: With dead ends: 2424 [2023-12-02 16:59:52,456 INFO L226 Difference]: Without dead ends: 1972 [2023-12-02 16:59:52,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:59:52,460 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 207 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:59:52,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 310 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:59:52,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2023-12-02 16:59:52,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 1965. [2023-12-02 16:59:52,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1450 states have (on average 1.2903448275862068) internal successors, (1871), 1459 states have internal predecessors, (1871), 303 states have call successors, (303), 211 states have call predecessors, (303), 210 states have return successors, (358), 296 states have call predecessors, (358), 302 states have call successors, (358) [2023-12-02 16:59:52,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 2532 transitions. [2023-12-02 16:59:52,756 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 2532 transitions. Word has length 81 [2023-12-02 16:59:52,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:52,757 INFO L495 AbstractCegarLoop]: Abstraction has 1965 states and 2532 transitions. [2023-12-02 16:59:52,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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) [2023-12-02 16:59:52,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 2532 transitions. [2023-12-02 16:59:52,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-02 16:59:52,761 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:52,761 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:59:52,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 16:59:52,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:52,962 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:59:52,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:52,962 INFO L85 PathProgramCache]: Analyzing trace with hash -55954402, now seen corresponding path program 1 times [2023-12-02 16:59:52,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:52,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842797583] [2023-12-02 16:59:52,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:52,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 16:59:53,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:53,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842797583] [2023-12-02 16:59:53,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842797583] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:59:53,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154223199] [2023-12-02 16:59:53,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:53,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:53,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:59:53,064 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:59:53,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 16:59:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:53,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:59:53,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:59:53,235 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:59:53,235 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:59:53,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154223199] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:59:53,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:59:53,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 16:59:53,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177098473] [2023-12-02 16:59:53,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:59:53,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:59:53,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:53,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:59:53,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:59:53,237 INFO L87 Difference]: Start difference. First operand 1965 states and 2532 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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) [2023-12-02 16:59:53,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:53,557 INFO L93 Difference]: Finished difference Result 3696 states and 5146 transitions. [2023-12-02 16:59:53,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:59:53,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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 81 [2023-12-02 16:59:53,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:53,570 INFO L225 Difference]: With dead ends: 3696 [2023-12-02 16:59:53,571 INFO L226 Difference]: Without dead ends: 2815 [2023-12-02 16:59:53,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:59:53,575 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 204 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:59:53,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 310 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:59:53,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2815 states. [2023-12-02 16:59:53,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2815 to 2803. [2023-12-02 16:59:53,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2803 states, 2109 states have (on average 1.316737790422001) internal successors, (2777), 2124 states have internal predecessors, (2777), 422 states have call successors, (422), 271 states have call predecessors, (422), 270 states have return successors, (525), 409 states have call predecessors, (525), 421 states have call successors, (525) [2023-12-02 16:59:53,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2803 states to 2803 states and 3724 transitions. [2023-12-02 16:59:53,833 INFO L78 Accepts]: Start accepts. Automaton has 2803 states and 3724 transitions. Word has length 81 [2023-12-02 16:59:53,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:53,833 INFO L495 AbstractCegarLoop]: Abstraction has 2803 states and 3724 transitions. [2023-12-02 16:59:53,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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) [2023-12-02 16:59:53,833 INFO L276 IsEmpty]: Start isEmpty. Operand 2803 states and 3724 transitions. [2023-12-02 16:59:53,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-02 16:59:53,838 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:53,838 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:59:53,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 16:59:54,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 16:59:54,039 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:59:54,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:54,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1039761470, now seen corresponding path program 1 times [2023-12-02 16:59:54,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:54,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205996750] [2023-12-02 16:59:54,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:54,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 16:59:54,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:54,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205996750] [2023-12-02 16:59:54,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205996750] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:59:54,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:59:54,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:59:54,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051022633] [2023-12-02 16:59:54,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:59:54,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:59:54,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:54,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:59:54,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:59:54,131 INFO L87 Difference]: Start difference. First operand 2803 states and 3724 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 16:59:54,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:54,530 INFO L93 Difference]: Finished difference Result 4597 states and 6409 transitions. [2023-12-02 16:59:54,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:59:54,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 81 [2023-12-02 16:59:54,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:54,547 INFO L225 Difference]: With dead ends: 4597 [2023-12-02 16:59:54,547 INFO L226 Difference]: Without dead ends: 3219 [2023-12-02 16:59:54,551 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 [2023-12-02 16:59:54,552 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 60 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:59:54,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 458 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:59:54,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3219 states. [2023-12-02 16:59:54,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3219 to 3047. [2023-12-02 16:59:54,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3047 states, 2337 states have (on average 1.3406076166024818) internal successors, (3133), 2352 states have internal predecessors, (3133), 430 states have call successors, (430), 279 states have call predecessors, (430), 278 states have return successors, (533), 417 states have call predecessors, (533), 429 states have call successors, (533) [2023-12-02 16:59:54,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3047 states to 3047 states and 4096 transitions. [2023-12-02 16:59:54,806 INFO L78 Accepts]: Start accepts. Automaton has 3047 states and 4096 transitions. Word has length 81 [2023-12-02 16:59:54,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:54,806 INFO L495 AbstractCegarLoop]: Abstraction has 3047 states and 4096 transitions. [2023-12-02 16:59:54,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 16:59:54,806 INFO L276 IsEmpty]: Start isEmpty. Operand 3047 states and 4096 transitions. [2023-12-02 16:59:54,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-02 16:59:54,811 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:54,811 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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] [2023-12-02 16:59:54,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 16:59:54,812 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:59:54,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:54,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1128473359, now seen corresponding path program 1 times [2023-12-02 16:59:54,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:54,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218839538] [2023-12-02 16:59:54,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:54,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:55,091 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 16:59:55,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:55,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218839538] [2023-12-02 16:59:55,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218839538] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:59:55,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028045225] [2023-12-02 16:59:55,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:55,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:55,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:59:55,093 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:59:55,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 16:59:55,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:55,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:59:55,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:59:55,269 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:59:55,270 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:59:55,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028045225] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:59:55,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:59:55,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 15 [2023-12-02 16:59:55,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317212599] [2023-12-02 16:59:55,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:59:55,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:59:55,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:55,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:59:55,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-12-02 16:59:55,272 INFO L87 Difference]: Start difference. First operand 3047 states and 4096 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 16:59:55,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:55,662 INFO L93 Difference]: Finished difference Result 3872 states and 5084 transitions. [2023-12-02 16:59:55,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:59:55,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2023-12-02 16:59:55,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:55,679 INFO L225 Difference]: With dead ends: 3872 [2023-12-02 16:59:55,680 INFO L226 Difference]: Without dead ends: 3076 [2023-12-02 16:59:55,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-12-02 16:59:55,682 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 46 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:59:55,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 434 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:59:55,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2023-12-02 16:59:56,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 3043. [2023-12-02 16:59:56,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3043 states, 2333 states have (on average 1.327475353621946) internal successors, (3097), 2348 states have internal predecessors, (3097), 430 states have call successors, (430), 279 states have call predecessors, (430), 278 states have return successors, (533), 417 states have call predecessors, (533), 429 states have call successors, (533) [2023-12-02 16:59:56,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 4060 transitions. [2023-12-02 16:59:56,034 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 4060 transitions. Word has length 102 [2023-12-02 16:59:56,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:56,035 INFO L495 AbstractCegarLoop]: Abstraction has 3043 states and 4060 transitions. [2023-12-02 16:59:56,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 16:59:56,035 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 4060 transitions. [2023-12-02 16:59:56,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-02 16:59:56,040 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:56,040 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1] [2023-12-02 16:59:56,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 16:59:56,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 16:59:56,241 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:59:56,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:56,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1589936178, now seen corresponding path program 1 times [2023-12-02 16:59:56,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:56,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129492614] [2023-12-02 16:59:56,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:56,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:56,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:56,559 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 16:59:56,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:56,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129492614] [2023-12-02 16:59:56,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129492614] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:59:56,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688915847] [2023-12-02 16:59:56,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:56,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:56,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:59:56,561 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:59:56,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 16:59:56,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:56,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 16:59:56,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:59:56,702 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:59:56,703 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:59:56,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688915847] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:59:56,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:59:56,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2023-12-02 16:59:56,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834431751] [2023-12-02 16:59:56,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:59:56,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:59:56,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:56,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:59:56,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-12-02 16:59:56,705 INFO L87 Difference]: Start difference. First operand 3043 states and 4060 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 16:59:57,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:57,272 INFO L93 Difference]: Finished difference Result 3905 states and 5064 transitions. [2023-12-02 16:59:57,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 16:59:57,272 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2023-12-02 16:59:57,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:57,289 INFO L225 Difference]: With dead ends: 3905 [2023-12-02 16:59:57,289 INFO L226 Difference]: Without dead ends: 2858 [2023-12-02 16:59:57,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-12-02 16:59:57,293 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 204 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:59:57,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 899 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:59:57,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2858 states. [2023-12-02 16:59:57,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2858 to 2673. [2023-12-02 16:59:57,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2673 states, 2095 states have (on average 1.348926014319809) internal successors, (2826), 2110 states have internal predecessors, (2826), 359 states have call successors, (359), 218 states have call predecessors, (359), 217 states have return successors, (462), 346 states have call predecessors, (462), 358 states have call successors, (462) [2023-12-02 16:59:57,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2673 states to 2673 states and 3647 transitions. [2023-12-02 16:59:57,537 INFO L78 Accepts]: Start accepts. Automaton has 2673 states and 3647 transitions. Word has length 102 [2023-12-02 16:59:57,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:57,538 INFO L495 AbstractCegarLoop]: Abstraction has 2673 states and 3647 transitions. [2023-12-02 16:59:57,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 16:59:57,538 INFO L276 IsEmpty]: Start isEmpty. Operand 2673 states and 3647 transitions. [2023-12-02 16:59:57,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-02 16:59:57,545 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:57,545 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2023-12-02 16:59:57,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-02 16:59:57,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 16:59:57,746 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:59:57,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:57,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1100301263, now seen corresponding path program 1 times [2023-12-02 16:59:57,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:57,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270017003] [2023-12-02 16:59:57,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:57,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:57,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 16:59:57,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:57,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270017003] [2023-12-02 16:59:57,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270017003] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:59:57,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050803554] [2023-12-02 16:59:57,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:57,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:57,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:59:57,944 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:59:57,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 16:59:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:58,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 16:59:58,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:59:58,119 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:59:58,119 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:59:58,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050803554] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:59:58,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:59:58,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-12-02 16:59:58,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311842720] [2023-12-02 16:59:58,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:59:58,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:59:58,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:58,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:59:58,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-12-02 16:59:58,122 INFO L87 Difference]: Start difference. First operand 2673 states and 3647 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 16:59:58,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:58,508 INFO L93 Difference]: Finished difference Result 3222 states and 4272 transitions. [2023-12-02 16:59:58,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 16:59:58,509 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2023-12-02 16:59:58,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:58,521 INFO L225 Difference]: With dead ends: 3222 [2023-12-02 16:59:58,521 INFO L226 Difference]: Without dead ends: 2629 [2023-12-02 16:59:58,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-12-02 16:59:58,523 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 65 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:59:58,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 928 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:59:58,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2629 states. [2023-12-02 16:59:58,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2629 to 2537. [2023-12-02 16:59:58,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2537 states, 1995 states have (on average 1.3578947368421053) internal successors, (2709), 2010 states have internal predecessors, (2709), 340 states have call successors, (340), 201 states have call predecessors, (340), 200 states have return successors, (443), 327 states have call predecessors, (443), 339 states have call successors, (443) [2023-12-02 16:59:58,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 3492 transitions. [2023-12-02 16:59:58,716 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 3492 transitions. Word has length 112 [2023-12-02 16:59:58,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:58,716 INFO L495 AbstractCegarLoop]: Abstraction has 2537 states and 3492 transitions. [2023-12-02 16:59:58,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 16:59:58,717 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 3492 transitions. [2023-12-02 16:59:58,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 16:59:58,721 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:58,721 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:59:58,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 16:59:58,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 16:59:58,922 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:59:58,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:58,923 INFO L85 PathProgramCache]: Analyzing trace with hash -2092258818, now seen corresponding path program 1 times [2023-12-02 16:59:58,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:58,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225011228] [2023-12-02 16:59:58,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:58,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:58,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:59,072 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-02 16:59:59,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:59,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225011228] [2023-12-02 16:59:59,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225011228] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:59:59,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032108192] [2023-12-02 16:59:59,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:59,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:59,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:59:59,074 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:59:59,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 16:59:59,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:59,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 16:59:59,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:59:59,281 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 16:59:59,281 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:59:59,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032108192] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:59:59,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:59:59,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2023-12-02 16:59:59,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405192266] [2023-12-02 16:59:59,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:59:59,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:59:59,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:59,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:59:59,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 16:59:59,284 INFO L87 Difference]: Start difference. First operand 2537 states and 3492 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 16:59:59,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:59,653 INFO L93 Difference]: Finished difference Result 3286 states and 4337 transitions. [2023-12-02 16:59:59,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 16:59:59,653 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2023-12-02 16:59:59,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:59,663 INFO L225 Difference]: With dead ends: 3286 [2023-12-02 16:59:59,663 INFO L226 Difference]: Without dead ends: 2829 [2023-12-02 16:59:59,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-12-02 16:59:59,666 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 190 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:59:59,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 988 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:59:59,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2829 states. [2023-12-02 16:59:59,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2829 to 2795. [2023-12-02 16:59:59,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2795 states, 2157 states have (on average 1.3393602225312935) internal successors, (2889), 2178 states have internal predecessors, (2889), 388 states have call successors, (388), 243 states have call predecessors, (388), 248 states have return successors, (503), 375 states have call predecessors, (503), 387 states have call successors, (503) [2023-12-02 16:59:59,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 3780 transitions. [2023-12-02 16:59:59,888 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 3780 transitions. Word has length 113 [2023-12-02 16:59:59,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:59,888 INFO L495 AbstractCegarLoop]: Abstraction has 2795 states and 3780 transitions. [2023-12-02 16:59:59,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 16:59:59,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 3780 transitions. [2023-12-02 16:59:59,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-02 16:59:59,893 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:59,893 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:59:59,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 17:00:00,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:00,094 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:00:00,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:00,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1137696534, now seen corresponding path program 1 times [2023-12-02 17:00:00,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:00:00,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164979524] [2023-12-02 17:00:00,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:00,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:00:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:00,877 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 17:00:00,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:00:00,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164979524] [2023-12-02 17:00:00,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164979524] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:00:00,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055112822] [2023-12-02 17:00:00,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:00,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:00,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:00,878 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:00,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 17:00:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:00,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 59 conjunts are in the unsatisfiable core [2023-12-02 17:00:00,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:01,818 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:00:01,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:03,532 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:00:03,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055112822] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:03,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1048379273] [2023-12-02 17:00:03,535 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2023-12-02 17:00:03,536 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:00:03,536 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:00:03,536 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:00:03,536 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:00:25,455 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 7 for LOIs [2023-12-02 17:00:25,457 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 13 for LOIs [2023-12-02 17:00:25,458 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2023-12-02 17:00:25,462 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 144 for LOIs [2023-12-02 17:00:26,219 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 145 for LOIs [2023-12-02 17:00:26,953 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 16 for LOIs [2023-12-02 17:00:26,975 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 138 for LOIs [2023-12-02 17:00:27,090 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 149 for LOIs [2023-12-02 17:00:27,243 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:00:36,072 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '97910#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~p_last_write~0))' at error location [2023-12-02 17:00:36,072 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:00:36,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:00:36,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 16] total 51 [2023-12-02 17:00:36,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872146286] [2023-12-02 17:00:36,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:00:36,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-02 17:00:36,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:00:36,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-02 17:00:36,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=829, Invalid=10091, Unknown=0, NotChecked=0, Total=10920 [2023-12-02 17:00:36,079 INFO L87 Difference]: Start difference. First operand 2795 states and 3780 transitions. Second operand has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2023-12-02 17:00:52,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:52,152 INFO L93 Difference]: Finished difference Result 5664 states and 7269 transitions. [2023-12-02 17:00:52,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 255 states. [2023-12-02 17:00:52,153 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) Word has length 114 [2023-12-02 17:00:52,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:52,164 INFO L225 Difference]: With dead ends: 5664 [2023-12-02 17:00:52,164 INFO L226 Difference]: Without dead ends: 4949 [2023-12-02 17:00:52,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 292 SyntacticMatches, 3 SemanticMatches, 353 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 51512 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=11592, Invalid=114078, Unknown=0, NotChecked=0, Total=125670 [2023-12-02 17:00:52,189 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 4644 mSDsluCounter, 3122 mSDsCounter, 0 mSdLazyCounter, 5680 mSolverCounterSat, 2342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4644 SdHoareTripleChecker+Valid, 3338 SdHoareTripleChecker+Invalid, 8022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2342 IncrementalHoareTripleChecker+Valid, 5680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:00:52,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4644 Valid, 3338 Invalid, 8022 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2342 Valid, 5680 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-12-02 17:00:52,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4949 states. [2023-12-02 17:00:52,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4949 to 3071. [2023-12-02 17:00:52,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3071 states, 2341 states have (on average 1.3242204186245194) internal successors, (3100), 2364 states have internal predecessors, (3100), 433 states have call successors, (433), 280 states have call predecessors, (433), 295 states have return successors, (560), 428 states have call predecessors, (560), 432 states have call successors, (560) [2023-12-02 17:00:52,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3071 states to 3071 states and 4093 transitions. [2023-12-02 17:00:52,530 INFO L78 Accepts]: Start accepts. Automaton has 3071 states and 4093 transitions. Word has length 114 [2023-12-02 17:00:52,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:52,530 INFO L495 AbstractCegarLoop]: Abstraction has 3071 states and 4093 transitions. [2023-12-02 17:00:52,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2023-12-02 17:00:52,530 INFO L276 IsEmpty]: Start isEmpty. Operand 3071 states and 4093 transitions. [2023-12-02 17:00:52,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-12-02 17:00:52,535 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:52,536 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:00:52,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 17:00:52,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:52,736 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:00:52,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:52,737 INFO L85 PathProgramCache]: Analyzing trace with hash 2129753961, now seen corresponding path program 1 times [2023-12-02 17:00:52,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:00:52,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042182753] [2023-12-02 17:00:52,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:52,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:00:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 17:00:52,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:00:52,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042182753] [2023-12-02 17:00:52,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042182753] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:00:52,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9250255] [2023-12-02 17:00:52,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:52,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:52,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:52,968 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:52,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 17:00:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:53,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 17:00:53,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:00:53,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 17:00:53,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9250255] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 17:00:53,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:00:53,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2023-12-02 17:00:53,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627949109] [2023-12-02 17:00:53,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:00:53,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 17:00:53,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:00:53,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 17:00:53,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:00:53,345 INFO L87 Difference]: Start difference. First operand 3071 states and 4093 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 17:00:54,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:54,157 INFO L93 Difference]: Finished difference Result 4395 states and 5641 transitions. [2023-12-02 17:00:54,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 17:00:54,158 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2023-12-02 17:00:54,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:54,165 INFO L225 Difference]: With dead ends: 4395 [2023-12-02 17:00:54,165 INFO L226 Difference]: Without dead ends: 3404 [2023-12-02 17:00:54,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2023-12-02 17:00:54,169 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 298 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:00:54,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 666 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:00:54,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3404 states. [2023-12-02 17:00:54,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3404 to 3151. [2023-12-02 17:00:54,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3151 states, 2386 states have (on average 1.3206202849958089) internal successors, (3151), 2412 states have internal predecessors, (3151), 452 states have call successors, (452), 289 states have call predecessors, (452), 311 states have return successors, (600), 451 states have call predecessors, (600), 451 states have call successors, (600) [2023-12-02 17:00:54,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3151 states to 3151 states and 4203 transitions. [2023-12-02 17:00:54,559 INFO L78 Accepts]: Start accepts. Automaton has 3151 states and 4203 transitions. Word has length 115 [2023-12-02 17:00:54,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:54,560 INFO L495 AbstractCegarLoop]: Abstraction has 3151 states and 4203 transitions. [2023-12-02 17:00:54,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 17:00:54,560 INFO L276 IsEmpty]: Start isEmpty. Operand 3151 states and 4203 transitions. [2023-12-02 17:00:54,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-12-02 17:00:54,564 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:54,564 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:00:54,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-02 17:00:54,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:54,765 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:00:54,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:54,765 INFO L85 PathProgramCache]: Analyzing trace with hash 593595269, now seen corresponding path program 1 times [2023-12-02 17:00:54,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:00:54,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251488994] [2023-12-02 17:00:54,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:54,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:00:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-02 17:00:54,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:00:54,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251488994] [2023-12-02 17:00:54,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251488994] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:00:54,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:00:54,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:00:54,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254169019] [2023-12-02 17:00:54,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:00:54,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:00:54,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:00:54,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:00:54,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:00:54,809 INFO L87 Difference]: Start difference. First operand 3151 states and 4203 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 17:00:55,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:55,466 INFO L93 Difference]: Finished difference Result 6988 states and 9920 transitions. [2023-12-02 17:00:55,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:00:55,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 108 [2023-12-02 17:00:55,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:55,480 INFO L225 Difference]: With dead ends: 6988 [2023-12-02 17:00:55,480 INFO L226 Difference]: Without dead ends: 5025 [2023-12-02 17:00:55,488 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 [2023-12-02 17:00:55,489 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 201 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:00:55,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 324 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:00:55,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5025 states. [2023-12-02 17:00:56,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5025 to 4995. [2023-12-02 17:00:56,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4995 states, 3866 states have (on average 1.3416968442834971) internal successors, (5187), 3904 states have internal predecessors, (5187), 688 states have call successors, (688), 417 states have call predecessors, (688), 439 states have return successors, (924), 675 states have call predecessors, (924), 687 states have call successors, (924) [2023-12-02 17:00:56,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4995 states to 4995 states and 6799 transitions. [2023-12-02 17:00:56,107 INFO L78 Accepts]: Start accepts. Automaton has 4995 states and 6799 transitions. Word has length 108 [2023-12-02 17:00:56,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:56,107 INFO L495 AbstractCegarLoop]: Abstraction has 4995 states and 6799 transitions. [2023-12-02 17:00:56,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 17:00:56,108 INFO L276 IsEmpty]: Start isEmpty. Operand 4995 states and 6799 transitions. [2023-12-02 17:00:56,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-02 17:00:56,116 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:56,116 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:00:56,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-02 17:00:56,117 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:00:56,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:56,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1536104810, now seen corresponding path program 1 times [2023-12-02 17:00:56,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:00:56,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915168503] [2023-12-02 17:00:56,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:56,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:00:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 17:00:56,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:00:56,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915168503] [2023-12-02 17:00:56,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915168503] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:00:56,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641559881] [2023-12-02 17:00:56,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:56,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:56,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:56,756 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:56,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 17:00:56,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:56,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 62 conjunts are in the unsatisfiable core [2023-12-02 17:00:56,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:00:57,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 17:00:59,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641559881] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:59,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [640288356] [2023-12-02 17:00:59,169 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2023-12-02 17:00:59,169 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:00:59,170 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:00:59,170 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:00:59,170 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:01:08,828 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 7 for LOIs [2023-12-02 17:01:08,830 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 77 for LOIs [2023-12-02 17:01:08,869 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2023-12-02 17:01:08,872 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 145 for LOIs [2023-12-02 17:01:09,555 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 146 for LOIs [2023-12-02 17:01:10,227 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 16 for LOIs [2023-12-02 17:01:10,253 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 139 for LOIs [2023-12-02 17:01:10,394 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 150 for LOIs [2023-12-02 17:01:10,530 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:01:20,641 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '136606#(and (= ~q_req_up~0 1) (exists ((v_~q_req_up~0_100 Int) (v_~q_free~0_106 Int) (|v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_12| Int) (|v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| Int)) (and (or (= ~p_dw_st~0 0) (exists ((v_~p_dw_pc~0_48 Int) (v_~p_dw_st~0_135 Int)) (and (or (and (= v_~q_req_up~0_100 1) (<= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 2147483647) (= v_~p_dw_st~0_135 1) (<= 0 (+ ~p_last_write~0 2147483648)) (<= ~p_last_write~0 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 2147483648)) (= v_~p_dw_pc~0_48 1) (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_12| 1)) (and (<= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 2147483647) (= v_~p_dw_st~0_135 1) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 2147483648)) (= v_~p_dw_pc~0_48 0) (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_12| 1))) (not (= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 0))))) (or (and (= v_~q_free~0_106 0) (= ~p_dw_pc~0 1) (= 2 ~p_dw_st~0)) (and (<= v_~q_free~0_106 1) (<= 0 ~p_dw_pc~0) (= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 0) (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_12| 1))))) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_12| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_12| 0)) (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_12| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_12| 2147483648)))) (= ~q_free~0 1) (= ~c_dr_pc~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (= ~c_last_read~0 ~p_last_write~0) (= ~c_dr_st~0 1))' at error location [2023-12-02 17:01:20,641 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:01:20,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:01:20,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2023-12-02 17:01:20,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985908521] [2023-12-02 17:01:20,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:01:20,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-12-02 17:01:20,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:01:20,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-12-02 17:01:20,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=11440, Unknown=0, NotChecked=0, Total=12432 [2023-12-02 17:01:20,645 INFO L87 Difference]: Start difference. First operand 4995 states and 6799 transitions. Second operand has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2023-12-02 17:01:31,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:01:31,063 INFO L93 Difference]: Finished difference Result 7279 states and 9501 transitions. [2023-12-02 17:01:31,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2023-12-02 17:01:31,064 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) Word has length 124 [2023-12-02 17:01:31,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:01:31,086 INFO L225 Difference]: With dead ends: 7279 [2023-12-02 17:01:31,086 INFO L226 Difference]: Without dead ends: 6208 [2023-12-02 17:01:31,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 322 SyntacticMatches, 1 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 26875 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=6811, Invalid=62095, Unknown=0, NotChecked=0, Total=68906 [2023-12-02 17:01:31,099 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 5188 mSDsluCounter, 2187 mSDsCounter, 0 mSdLazyCounter, 4666 mSolverCounterSat, 2902 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5188 SdHoareTripleChecker+Valid, 2373 SdHoareTripleChecker+Invalid, 7568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2902 IncrementalHoareTripleChecker+Valid, 4666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:01:31,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5188 Valid, 2373 Invalid, 7568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2902 Valid, 4666 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-12-02 17:01:31,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6208 states. [2023-12-02 17:01:31,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6208 to 4811. [2023-12-02 17:01:31,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4811 states, 3754 states have (on average 1.3476291955247737) internal successors, (5059), 3791 states have internal predecessors, (5059), 648 states have call successors, (648), 385 states have call predecessors, (648), 407 states have return successors, (874), 636 states have call predecessors, (874), 647 states have call successors, (874) [2023-12-02 17:01:31,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4811 states to 4811 states and 6581 transitions. [2023-12-02 17:01:31,792 INFO L78 Accepts]: Start accepts. Automaton has 4811 states and 6581 transitions. Word has length 124 [2023-12-02 17:01:31,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:01:31,792 INFO L495 AbstractCegarLoop]: Abstraction has 4811 states and 6581 transitions. [2023-12-02 17:01:31,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2023-12-02 17:01:31,792 INFO L276 IsEmpty]: Start isEmpty. Operand 4811 states and 6581 transitions. [2023-12-02 17:01:31,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-02 17:01:31,801 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:01:31,802 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:01:31,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 17:01:32,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:01:32,003 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:01:32,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:01:32,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1894153122, now seen corresponding path program 1 times [2023-12-02 17:01:32,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:01:32,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040283420] [2023-12-02 17:01:32,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:32,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:01:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:01:32,195 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-02 17:01:32,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:01:32,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040283420] [2023-12-02 17:01:32,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040283420] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:01:32,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564831450] [2023-12-02 17:01:32,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:32,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:01:32,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:01:32,197 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:01:32,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 17:01:32,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:01:32,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 17:01:32,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:01:32,427 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 17:01:32,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:01:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 17:01:32,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564831450] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 17:01:32,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:01:32,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2023-12-02 17:01:32,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598587342] [2023-12-02 17:01:32,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:01:32,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 17:01:32,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:01:32,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 17:01:32,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-12-02 17:01:32,602 INFO L87 Difference]: Start difference. First operand 4811 states and 6581 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 17:01:33,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:01:33,657 INFO L93 Difference]: Finished difference Result 5466 states and 7322 transitions. [2023-12-02 17:01:33,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 17:01:33,657 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2023-12-02 17:01:33,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:01:33,670 INFO L225 Difference]: With dead ends: 5466 [2023-12-02 17:01:33,670 INFO L226 Difference]: Without dead ends: 4579 [2023-12-02 17:01:33,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2023-12-02 17:01:33,673 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 472 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:01:33,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 439 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:01:33,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4579 states. [2023-12-02 17:01:34,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4579 to 4542. [2023-12-02 17:01:34,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4542 states, 3555 states have (on average 1.3541490857946554) internal successors, (4814), 3592 states have internal predecessors, (4814), 612 states have call successors, (612), 355 states have call predecessors, (612), 373 states have return successors, (833), 596 states have call predecessors, (833), 611 states have call successors, (833) [2023-12-02 17:01:34,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4542 states to 4542 states and 6259 transitions. [2023-12-02 17:01:34,220 INFO L78 Accepts]: Start accepts. Automaton has 4542 states and 6259 transitions. Word has length 125 [2023-12-02 17:01:34,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:01:34,221 INFO L495 AbstractCegarLoop]: Abstraction has 4542 states and 6259 transitions. [2023-12-02 17:01:34,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 17:01:34,221 INFO L276 IsEmpty]: Start isEmpty. Operand 4542 states and 6259 transitions. [2023-12-02 17:01:34,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 17:01:34,230 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:01:34,231 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-12-02 17:01:34,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 17:01:34,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:01:34,431 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:01:34,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:01:34,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1999016591, now seen corresponding path program 1 times [2023-12-02 17:01:34,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:01:34,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746412679] [2023-12-02 17:01:34,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:34,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:01:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:01:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-02 17:01:34,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:01:34,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746412679] [2023-12-02 17:01:34,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746412679] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:01:34,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582196820] [2023-12-02 17:01:34,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:34,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:01:34,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:01:34,510 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:01:34,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 17:01:34,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:01:34,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:01:34,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:01:34,678 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:01:34,679 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:01:34,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582196820] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:01:34,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:01:34,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 17:01:34,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919337695] [2023-12-02 17:01:34,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:01:34,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:01:34,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:01:34,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:01:34,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:01:34,680 INFO L87 Difference]: Start difference. First operand 4542 states and 6259 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 17:01:35,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:01:35,410 INFO L93 Difference]: Finished difference Result 7802 states and 11069 transitions. [2023-12-02 17:01:35,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:01:35,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 123 [2023-12-02 17:01:35,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:01:35,423 INFO L225 Difference]: With dead ends: 7802 [2023-12-02 17:01:35,423 INFO L226 Difference]: Without dead ends: 5840 [2023-12-02 17:01:35,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:01:35,430 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 73 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:01:35,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 457 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:01:35,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5840 states. [2023-12-02 17:01:36,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5840 to 5286. [2023-12-02 17:01:36,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5286 states, 4243 states have (on average 1.3825123733207636) internal successors, (5866), 4280 states have internal predecessors, (5866), 640 states have call successors, (640), 383 states have call predecessors, (640), 401 states have return successors, (861), 624 states have call predecessors, (861), 639 states have call successors, (861) [2023-12-02 17:01:36,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5286 states to 5286 states and 7367 transitions. [2023-12-02 17:01:36,029 INFO L78 Accepts]: Start accepts. Automaton has 5286 states and 7367 transitions. Word has length 123 [2023-12-02 17:01:36,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:01:36,030 INFO L495 AbstractCegarLoop]: Abstraction has 5286 states and 7367 transitions. [2023-12-02 17:01:36,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 17:01:36,030 INFO L276 IsEmpty]: Start isEmpty. Operand 5286 states and 7367 transitions. [2023-12-02 17:01:36,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 17:01:36,039 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:01:36,039 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:01:36,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-02 17:01:36,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-02 17:01:36,240 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:01:36,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:01:36,240 INFO L85 PathProgramCache]: Analyzing trace with hash 889144813, now seen corresponding path program 1 times [2023-12-02 17:01:36,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:01:36,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330092421] [2023-12-02 17:01:36,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:36,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:01:36,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:01:36,323 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-02 17:01:36,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:01:36,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330092421] [2023-12-02 17:01:36,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330092421] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:01:36,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879369419] [2023-12-02 17:01:36,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:36,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:01:36,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:01:36,324 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:01:36,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 17:01:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:01:36,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:01:36,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:01:36,464 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:01:36,464 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:01:36,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879369419] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:01:36,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:01:36,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 17:01:36,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146873711] [2023-12-02 17:01:36,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:01:36,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:01:36,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:01:36,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:01:36,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:01:36,466 INFO L87 Difference]: Start difference. First operand 5286 states and 7367 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 17:01:37,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:01:37,336 INFO L93 Difference]: Finished difference Result 9360 states and 13339 transitions. [2023-12-02 17:01:37,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:01:37,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 123 [2023-12-02 17:01:37,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:01:37,349 INFO L225 Difference]: With dead ends: 9360 [2023-12-02 17:01:37,350 INFO L226 Difference]: Without dead ends: 7033 [2023-12-02 17:01:37,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:01:37,357 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 85 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:01:37,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 480 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:01:37,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7033 states. [2023-12-02 17:01:38,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7033 to 6339. [2023-12-02 17:01:38,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6339 states, 5212 states have (on average 1.4040675364543362) internal successors, (7318), 5249 states have internal predecessors, (7318), 682 states have call successors, (682), 425 states have call predecessors, (682), 443 states have return successors, (903), 666 states have call predecessors, (903), 681 states have call successors, (903) [2023-12-02 17:01:38,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6339 states to 6339 states and 8903 transitions. [2023-12-02 17:01:38,044 INFO L78 Accepts]: Start accepts. Automaton has 6339 states and 8903 transitions. Word has length 123 [2023-12-02 17:01:38,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:01:38,044 INFO L495 AbstractCegarLoop]: Abstraction has 6339 states and 8903 transitions. [2023-12-02 17:01:38,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 17:01:38,044 INFO L276 IsEmpty]: Start isEmpty. Operand 6339 states and 8903 transitions. [2023-12-02 17:01:38,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 17:01:38,053 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:01:38,053 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:01:38,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-02 17:01:38,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-02 17:01:38,254 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:01:38,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:01:38,254 INFO L85 PathProgramCache]: Analyzing trace with hash 220179106, now seen corresponding path program 1 times [2023-12-02 17:01:38,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:01:38,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404891752] [2023-12-02 17:01:38,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:38,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:01:38,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:01:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-02 17:01:38,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:01:38,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404891752] [2023-12-02 17:01:38,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404891752] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:01:38,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125537919] [2023-12-02 17:01:38,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:38,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:01:38,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:01:38,320 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:01:38,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 17:01:38,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:01:38,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:01:38,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:01:38,459 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:01:38,459 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:01:38,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125537919] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:01:38,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:01:38,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 17:01:38,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348067353] [2023-12-02 17:01:38,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:01:38,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:01:38,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:01:38,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:01:38,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:01:38,461 INFO L87 Difference]: Start difference. First operand 6339 states and 8903 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 17:01:39,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:01:39,318 INFO L93 Difference]: Finished difference Result 11333 states and 16216 transitions. [2023-12-02 17:01:39,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:01:39,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 123 [2023-12-02 17:01:39,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:01:39,331 INFO L225 Difference]: With dead ends: 11333 [2023-12-02 17:01:39,331 INFO L226 Difference]: Without dead ends: 8469 [2023-12-02 17:01:39,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:01:39,338 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 79 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:01:39,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 475 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:01:39,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8469 states. [2023-12-02 17:01:40,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8469 to 7845. [2023-12-02 17:01:40,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7845 states, 6592 states have (on average 1.4182342233009708) internal successors, (9349), 6629 states have internal predecessors, (9349), 745 states have call successors, (745), 488 states have call predecessors, (745), 506 states have return successors, (966), 729 states have call predecessors, (966), 744 states have call successors, (966) [2023-12-02 17:01:40,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7845 states to 7845 states and 11060 transitions. [2023-12-02 17:01:40,116 INFO L78 Accepts]: Start accepts. Automaton has 7845 states and 11060 transitions. Word has length 123 [2023-12-02 17:01:40,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:01:40,117 INFO L495 AbstractCegarLoop]: Abstraction has 7845 states and 11060 transitions. [2023-12-02 17:01:40,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 17:01:40,117 INFO L276 IsEmpty]: Start isEmpty. Operand 7845 states and 11060 transitions. [2023-12-02 17:01:40,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 17:01:40,132 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:01:40,132 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:01:40,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 17:01:40,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 17:01:40,333 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:01:40,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:01:40,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1067757050, now seen corresponding path program 1 times [2023-12-02 17:01:40,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:01:40,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643621892] [2023-12-02 17:01:40,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:40,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:01:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:01:40,409 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-02 17:01:40,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:01:40,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643621892] [2023-12-02 17:01:40,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643621892] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:01:40,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26946168] [2023-12-02 17:01:40,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:40,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:01:40,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:01:40,410 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:01:40,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 17:01:40,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:01:40,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:01:40,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:01:40,591 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 17:01:40,591 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:01:40,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26946168] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:01:40,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:01:40,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 17:01:40,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261210215] [2023-12-02 17:01:40,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:01:40,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:01:40,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:01:40,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:01:40,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:01:40,593 INFO L87 Difference]: Start difference. First operand 7845 states and 11060 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 17:01:41,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:01:41,445 INFO L93 Difference]: Finished difference Result 12885 states and 18346 transitions. [2023-12-02 17:01:41,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:01:41,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 123 [2023-12-02 17:01:41,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:01:41,456 INFO L225 Difference]: With dead ends: 12885 [2023-12-02 17:01:41,456 INFO L226 Difference]: Without dead ends: 8730 [2023-12-02 17:01:41,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:01:41,464 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 199 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:01:41,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 239 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:01:41,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8730 states. [2023-12-02 17:01:42,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8730 to 8730. [2023-12-02 17:01:42,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8730 states, 7362 states have (on average 1.3994838359141537) internal successors, (10303), 7399 states have internal predecessors, (10303), 782 states have call successors, (782), 565 states have call predecessors, (782), 584 states have return successors, (1033), 767 states have call predecessors, (1033), 781 states have call successors, (1033) [2023-12-02 17:01:42,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8730 states to 8730 states and 12118 transitions. [2023-12-02 17:01:42,293 INFO L78 Accepts]: Start accepts. Automaton has 8730 states and 12118 transitions. Word has length 123 [2023-12-02 17:01:42,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:01:42,293 INFO L495 AbstractCegarLoop]: Abstraction has 8730 states and 12118 transitions. [2023-12-02 17:01:42,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 17:01:42,293 INFO L276 IsEmpty]: Start isEmpty. Operand 8730 states and 12118 transitions. [2023-12-02 17:01:42,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 17:01:42,303 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:01:42,303 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-12-02 17:01:42,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 17:01:42,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-02 17:01:42,504 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:01:42,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:01:42,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1650652487, now seen corresponding path program 1 times [2023-12-02 17:01:42,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:01:42,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138650337] [2023-12-02 17:01:42,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:42,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:01:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:01:42,576 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-02 17:01:42,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:01:42,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138650337] [2023-12-02 17:01:42,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138650337] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:01:42,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450461346] [2023-12-02 17:01:42,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:42,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:01:42,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:01:42,578 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:01:42,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 17:01:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:01:42,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:01:42,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:01:42,707 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:01:42,708 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:01:42,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450461346] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:01:42,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:01:42,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 17:01:42,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146460286] [2023-12-02 17:01:42,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:01:42,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:01:42,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:01:42,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:01:42,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:01:42,709 INFO L87 Difference]: Start difference. First operand 8730 states and 12118 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 17:01:43,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:01:43,811 INFO L93 Difference]: Finished difference Result 15951 states and 22445 transitions. [2023-12-02 17:01:43,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:01:43,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 123 [2023-12-02 17:01:43,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:01:43,830 INFO L225 Difference]: With dead ends: 15951 [2023-12-02 17:01:43,831 INFO L226 Difference]: Without dead ends: 11257 [2023-12-02 17:01:43,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:01:43,842 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 67 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:01:43,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 467 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:01:43,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11257 states. [2023-12-02 17:01:44,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11257 to 10593. [2023-12-02 17:01:44,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10593 states, 9063 states have (on average 1.4049431755489352) internal successors, (12733), 9100 states have internal predecessors, (12733), 863 states have call successors, (863), 646 states have call predecessors, (863), 665 states have return successors, (1114), 848 states have call predecessors, (1114), 862 states have call successors, (1114) [2023-12-02 17:01:44,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10593 states to 10593 states and 14710 transitions. [2023-12-02 17:01:44,866 INFO L78 Accepts]: Start accepts. Automaton has 10593 states and 14710 transitions. Word has length 123 [2023-12-02 17:01:44,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:01:44,866 INFO L495 AbstractCegarLoop]: Abstraction has 10593 states and 14710 transitions. [2023-12-02 17:01:44,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 17:01:44,866 INFO L276 IsEmpty]: Start isEmpty. Operand 10593 states and 14710 transitions. [2023-12-02 17:01:44,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 17:01:44,876 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:01:44,877 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-12-02 17:01:44,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-02 17:01:45,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:01:45,078 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:01:45,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:01:45,078 INFO L85 PathProgramCache]: Analyzing trace with hash 840741757, now seen corresponding path program 2 times [2023-12-02 17:01:45,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:01:45,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444835545] [2023-12-02 17:01:45,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:45,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:01:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:01:45,228 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 17:01:45,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:01:45,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444835545] [2023-12-02 17:01:45,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444835545] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:01:45,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349999370] [2023-12-02 17:01:45,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:01:45,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:01:45,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:01:45,230 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:01:45,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 17:01:45,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 17:01:45,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:01:45,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:01:45,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:01:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 17:01:45,360 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:01:45,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349999370] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:01:45,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:01:45,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 17:01:45,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260560032] [2023-12-02 17:01:45,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:01:45,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:01:45,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:01:45,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:01:45,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:01:45,362 INFO L87 Difference]: Start difference. First operand 10593 states and 14710 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:01:46,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:01:46,475 INFO L93 Difference]: Finished difference Result 16725 states and 23706 transitions. [2023-12-02 17:01:46,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:01:46,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 123 [2023-12-02 17:01:46,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:01:46,495 INFO L225 Difference]: With dead ends: 16725 [2023-12-02 17:01:46,495 INFO L226 Difference]: Without dead ends: 10615 [2023-12-02 17:01:46,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:01:46,506 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 123 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:01:46,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 469 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:01:46,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10615 states. [2023-12-02 17:01:47,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10615 to 10453. [2023-12-02 17:01:47,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10453 states, 8923 states have (on average 1.3866412641488288) internal successors, (12373), 8960 states have internal predecessors, (12373), 863 states have call successors, (863), 646 states have call predecessors, (863), 665 states have return successors, (1114), 848 states have call predecessors, (1114), 862 states have call successors, (1114) [2023-12-02 17:01:47,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10453 states to 10453 states and 14350 transitions. [2023-12-02 17:01:47,513 INFO L78 Accepts]: Start accepts. Automaton has 10453 states and 14350 transitions. Word has length 123 [2023-12-02 17:01:47,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:01:47,513 INFO L495 AbstractCegarLoop]: Abstraction has 10453 states and 14350 transitions. [2023-12-02 17:01:47,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:01:47,514 INFO L276 IsEmpty]: Start isEmpty. Operand 10453 states and 14350 transitions. [2023-12-02 17:01:47,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 17:01:47,524 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:01:47,524 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:01:47,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 17:01:47,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:01:47,725 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:01:47,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:01:47,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1340903459, now seen corresponding path program 1 times [2023-12-02 17:01:47,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:01:47,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644860943] [2023-12-02 17:01:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:47,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:01:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:01:47,909 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 17:01:47,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:01:47,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644860943] [2023-12-02 17:01:47,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644860943] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:01:47,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90977743] [2023-12-02 17:01:47,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:47,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:01:47,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:01:47,911 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:01:47,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 17:01:48,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:01:48,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:01:48,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:01:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:01:48,049 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:01:48,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90977743] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:01:48,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:01:48,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 17:01:48,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101216767] [2023-12-02 17:01:48,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:01:48,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:01:48,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:01:48,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:01:48,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:01:48,051 INFO L87 Difference]: Start difference. First operand 10453 states and 14350 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:01:49,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:01:49,534 INFO L93 Difference]: Finished difference Result 25233 states and 35227 transitions. [2023-12-02 17:01:49,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:01:49,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 123 [2023-12-02 17:01:49,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:01:49,561 INFO L225 Difference]: With dead ends: 25233 [2023-12-02 17:01:49,561 INFO L226 Difference]: Without dead ends: 15516 [2023-12-02 17:01:49,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:01:49,572 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 63 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:01:49,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 392 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:01:49,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15516 states. [2023-12-02 17:01:50,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15516 to 12945. [2023-12-02 17:01:50,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12945 states, 11195 states have (on average 1.3974095578383208) internal successors, (15644), 11233 states have internal predecessors, (15644), 973 states have call successors, (973), 756 states have call predecessors, (973), 775 states have return successors, (1224), 957 states have call predecessors, (1224), 972 states have call successors, (1224) [2023-12-02 17:01:50,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12945 states to 12945 states and 17841 transitions. [2023-12-02 17:01:50,868 INFO L78 Accepts]: Start accepts. Automaton has 12945 states and 17841 transitions. Word has length 123 [2023-12-02 17:01:50,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:01:50,868 INFO L495 AbstractCegarLoop]: Abstraction has 12945 states and 17841 transitions. [2023-12-02 17:01:50,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:01:50,869 INFO L276 IsEmpty]: Start isEmpty. Operand 12945 states and 17841 transitions. [2023-12-02 17:01:50,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-02 17:01:50,879 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:01:50,879 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:01:50,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-02 17:01:51,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-12-02 17:01:51,080 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:01:51,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:01:51,080 INFO L85 PathProgramCache]: Analyzing trace with hash 609326528, now seen corresponding path program 1 times [2023-12-02 17:01:51,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:01:51,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51381549] [2023-12-02 17:01:51,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:51,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:01:51,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:01:51,336 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-12-02 17:01:51,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:01:51,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51381549] [2023-12-02 17:01:51,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51381549] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:01:51,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155915352] [2023-12-02 17:01:51,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:51,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:01:51,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:01:51,338 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:01:51,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 17:01:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:01:51,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 17:01:51,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:01:51,618 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 58 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:01:51,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:01:51,841 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-02 17:01:51,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155915352] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:01:51,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [341809942] [2023-12-02 17:01:51,844 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2023-12-02 17:01:51,844 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:01:51,845 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:01:51,845 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:01:51,845 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:02:03,673 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 1 for LOIs [2023-12-02 17:02:03,679 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 1 for LOIs [2023-12-02 17:02:03,690 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 1 for LOIs [2023-12-02 17:02:03,690 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 46 for LOIs [2023-12-02 17:02:03,762 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 1 for LOIs [2023-12-02 17:02:03,886 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 152 for LOIs [2023-12-02 17:02:03,992 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:02:10,664 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '366359#(and (not (= ~token~0 (+ ~local~0 4))) (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (= ~m_pc~0 1) (<= 0 |ULTIMATE.start_eval2_~tmp~5#1|) (<= |ULTIMATE.start_eval2_~tmp~5#1| 1) (= ~m_st~0 1) (not (= |ULTIMATE.start_eval2_~tmp~5#1| 0)) (not (= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 0)))' at error location [2023-12-02 17:02:10,664 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:02:10,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:02:10,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2023-12-02 17:02:10,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525553902] [2023-12-02 17:02:10,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:02:10,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 17:02:10,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:02:10,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 17:02:10,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=3988, Unknown=0, NotChecked=0, Total=4290 [2023-12-02 17:02:10,667 INFO L87 Difference]: Start difference. First operand 12945 states and 17841 transitions. Second operand has 13 states, 13 states have (on average 12.23076923076923) internal successors, (159), 13 states have internal predecessors, (159), 8 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) [2023-12-02 17:02:14,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:02:14,182 INFO L93 Difference]: Finished difference Result 37789 states and 52521 transitions. [2023-12-02 17:02:14,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-02 17:02:14,183 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.23076923076923) internal successors, (159), 13 states have internal predecessors, (159), 8 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) Word has length 128 [2023-12-02 17:02:14,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:02:14,231 INFO L225 Difference]: With dead ends: 37789 [2023-12-02 17:02:14,231 INFO L226 Difference]: Without dead ends: 25580 [2023-12-02 17:02:14,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2645 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=697, Invalid=7493, Unknown=0, NotChecked=0, Total=8190 [2023-12-02 17:02:14,251 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 1324 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1324 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:02:14,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1324 Valid, 918 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 17:02:14,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25580 states. [2023-12-02 17:02:16,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25580 to 24026. [2023-12-02 17:02:16,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24026 states, 20629 states have (on average 1.3660381017014882) internal successors, (28180), 20691 states have internal predecessors, (28180), 1918 states have call successors, (1918), 1457 states have call predecessors, (1918), 1477 states have return successors, (2445), 1879 states have call predecessors, (2445), 1917 states have call successors, (2445) [2023-12-02 17:02:16,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24026 states to 24026 states and 32543 transitions. [2023-12-02 17:02:16,922 INFO L78 Accepts]: Start accepts. Automaton has 24026 states and 32543 transitions. Word has length 128 [2023-12-02 17:02:16,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:02:16,922 INFO L495 AbstractCegarLoop]: Abstraction has 24026 states and 32543 transitions. [2023-12-02 17:02:16,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.23076923076923) internal successors, (159), 13 states have internal predecessors, (159), 8 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) [2023-12-02 17:02:16,922 INFO L276 IsEmpty]: Start isEmpty. Operand 24026 states and 32543 transitions. [2023-12-02 17:02:16,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-12-02 17:02:16,954 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:02:16,954 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:02:16,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-02 17:02:17,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-12-02 17:02:17,155 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:02:17,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:02:17,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1852719500, now seen corresponding path program 1 times [2023-12-02 17:02:17,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:02:17,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106865758] [2023-12-02 17:02:17,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:02:17,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:02:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:02:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 17:02:17,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:02:17,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106865758] [2023-12-02 17:02:17,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106865758] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:02:17,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331073559] [2023-12-02 17:02:17,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:02:17,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:02:17,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:02:17,294 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:02:17,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 17:02:17,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:02:17,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:02:17,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:02:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:02:17,464 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:02:17,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331073559] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:02:17,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:02:17,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 17:02:17,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480671073] [2023-12-02 17:02:17,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:02:17,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:02:17,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:02:17,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:02:17,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:02:17,466 INFO L87 Difference]: Start difference. First operand 24026 states and 32543 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 17:02:20,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:02:20,524 INFO L93 Difference]: Finished difference Result 45470 states and 62483 transitions. [2023-12-02 17:02:20,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:02:20,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 129 [2023-12-02 17:02:20,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:02:20,588 INFO L225 Difference]: With dead ends: 45470 [2023-12-02 17:02:20,588 INFO L226 Difference]: Without dead ends: 27508 [2023-12-02 17:02:20,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:02:20,613 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 90 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:02:20,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 468 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:02:20,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27508 states. [2023-12-02 17:02:23,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27508 to 27074. [2023-12-02 17:02:23,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27074 states, 23271 states have (on average 1.3567100683253834) internal successors, (31572), 23345 states have internal predecessors, (31572), 2148 states have call successors, (2148), 1635 states have call predecessors, (2148), 1653 states have return successors, (2857), 2095 states have call predecessors, (2857), 2147 states have call successors, (2857) [2023-12-02 17:02:23,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27074 states to 27074 states and 36577 transitions. [2023-12-02 17:02:23,662 INFO L78 Accepts]: Start accepts. Automaton has 27074 states and 36577 transitions. Word has length 129 [2023-12-02 17:02:23,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:02:23,663 INFO L495 AbstractCegarLoop]: Abstraction has 27074 states and 36577 transitions. [2023-12-02 17:02:23,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 17:02:23,663 INFO L276 IsEmpty]: Start isEmpty. Operand 27074 states and 36577 transitions. [2023-12-02 17:02:23,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-12-02 17:02:23,685 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:02:23,686 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:02:23,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-02 17:02:23,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-12-02 17:02:23,886 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:02:23,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:02:23,886 INFO L85 PathProgramCache]: Analyzing trace with hash -792104960, now seen corresponding path program 1 times [2023-12-02 17:02:23,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:02:23,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127212308] [2023-12-02 17:02:23,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:02:23,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:02:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:02:24,118 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-12-02 17:02:24,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:02:24,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127212308] [2023-12-02 17:02:24,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127212308] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:02:24,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768018884] [2023-12-02 17:02:24,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:02:24,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:02:24,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:02:24,119 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:02:24,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 17:02:24,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:02:24,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 17:02:24,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:02:24,346 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 68 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:02:24,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:02:24,873 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-12-02 17:02:24,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768018884] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:02:24,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [800919146] [2023-12-02 17:02:24,875 INFO L159 IcfgInterpreter]: Started Sifa with 74 locations of interest [2023-12-02 17:02:24,875 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:02:24,875 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:02:24,875 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:02:24,875 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:02:34,536 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 6 for LOIs [2023-12-02 17:02:34,543 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 77 for LOIs [2023-12-02 17:02:34,597 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 127 for LOIs [2023-12-02 17:02:34,692 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 116 for LOIs [2023-12-02 17:02:36,282 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 1 for LOIs [2023-12-02 17:02:36,389 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 158 for LOIs [2023-12-02 17:02:36,563 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:02:45,014 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '529145#(and (not (= ~token~0 (+ ~local~0 4))) (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (= ~m_pc~0 1) (<= 0 |ULTIMATE.start_eval2_~tmp~5#1|) (<= |ULTIMATE.start_eval2_~tmp~5#1| 1) (= ~m_st~0 1) (not (= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 0)))' at error location [2023-12-02 17:02:45,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:02:45,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:02:45,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 16 [2023-12-02 17:02:45,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224147829] [2023-12-02 17:02:45,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:02:45,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 17:02:45,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:02:45,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 17:02:45,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=4459, Unknown=0, NotChecked=0, Total=4830 [2023-12-02 17:02:45,016 INFO L87 Difference]: Start difference. First operand 27074 states and 36577 transitions. Second operand has 16 states, 14 states have (on average 11.5) internal successors, (161), 14 states have internal predecessors, (161), 8 states have call successors, (33), 5 states have call predecessors, (33), 6 states have return successors, (33), 8 states have call predecessors, (33), 8 states have call successors, (33) [2023-12-02 17:02:55,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:02:55,640 INFO L93 Difference]: Finished difference Result 89538 states and 122743 transitions. [2023-12-02 17:02:55,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-12-02 17:02:55,641 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 11.5) internal successors, (161), 14 states have internal predecessors, (161), 8 states have call successors, (33), 5 states have call predecessors, (33), 6 states have return successors, (33), 8 states have call predecessors, (33), 8 states have call successors, (33) Word has length 132 [2023-12-02 17:02:55,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:02:55,759 INFO L225 Difference]: With dead ends: 89538 [2023-12-02 17:02:55,759 INFO L226 Difference]: Without dead ends: 62732 [2023-12-02 17:02:55,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 384 SyntacticMatches, 6 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10772 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1862, Invalid=24870, Unknown=0, NotChecked=0, Total=26732 [2023-12-02 17:02:55,791 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 2306 mSDsluCounter, 3765 mSDsCounter, 0 mSdLazyCounter, 2713 mSolverCounterSat, 617 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2312 SdHoareTripleChecker+Valid, 4298 SdHoareTripleChecker+Invalid, 3330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 617 IncrementalHoareTripleChecker+Valid, 2713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:02:55,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2312 Valid, 4298 Invalid, 3330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [617 Valid, 2713 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-02 17:02:55,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62732 states. [2023-12-02 17:03:01,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62732 to 45549. [2023-12-02 17:03:01,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45549 states, 39735 states have (on average 1.3160689568390587) internal successors, (52294), 39876 states have internal predecessors, (52294), 3067 states have call successors, (3067), 2695 states have call predecessors, (3067), 2745 states have return successors, (3768), 2979 states have call predecessors, (3768), 3066 states have call successors, (3768) [2023-12-02 17:03:01,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45549 states to 45549 states and 59129 transitions. [2023-12-02 17:03:01,280 INFO L78 Accepts]: Start accepts. Automaton has 45549 states and 59129 transitions. Word has length 132 [2023-12-02 17:03:01,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:03:01,281 INFO L495 AbstractCegarLoop]: Abstraction has 45549 states and 59129 transitions. [2023-12-02 17:03:01,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 11.5) internal successors, (161), 14 states have internal predecessors, (161), 8 states have call successors, (33), 5 states have call predecessors, (33), 6 states have return successors, (33), 8 states have call predecessors, (33), 8 states have call successors, (33) [2023-12-02 17:03:01,281 INFO L276 IsEmpty]: Start isEmpty. Operand 45549 states and 59129 transitions. [2023-12-02 17:03:01,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-12-02 17:03:01,306 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:03:01,306 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:03:01,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-02 17:03:01,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-12-02 17:03:01,507 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:03:01,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:03:01,507 INFO L85 PathProgramCache]: Analyzing trace with hash -2079263864, now seen corresponding path program 1 times [2023-12-02 17:03:01,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:03:01,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976056595] [2023-12-02 17:03:01,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:03:01,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:03:01,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:03:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 23 proven. 30 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 17:03:01,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:03:01,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976056595] [2023-12-02 17:03:01,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976056595] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:03:01,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264565509] [2023-12-02 17:03:01,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:03:01,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:03:01,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:03:01,645 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:03:01,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-02 17:03:01,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:03:01,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:03:01,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:03:01,808 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:03:01,808 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:03:01,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264565509] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:03:01,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:03:01,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-12-02 17:03:01,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118530419] [2023-12-02 17:03:01,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:03:01,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:03:01,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:03:01,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:03:01,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:03:01,810 INFO L87 Difference]: Start difference. First operand 45549 states and 59129 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 17:03:06,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:03:06,971 INFO L93 Difference]: Finished difference Result 70290 states and 91145 transitions. [2023-12-02 17:03:06,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:03:06,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 134 [2023-12-02 17:03:06,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:03:07,048 INFO L225 Difference]: With dead ends: 70290 [2023-12-02 17:03:07,048 INFO L226 Difference]: Without dead ends: 46510 [2023-12-02 17:03:07,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-02 17:03:07,071 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 171 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:03:07,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 603 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:03:07,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46510 states. [2023-12-02 17:03:12,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46510 to 46350. [2023-12-02 17:03:12,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46350 states, 40428 states have (on average 1.3146581577124765) internal successors, (53149), 40623 states have internal predecessors, (53149), 3067 states have call successors, (3067), 2695 states have call predecessors, (3067), 2853 states have return successors, (3912), 3033 states have call predecessors, (3912), 3066 states have call successors, (3912) [2023-12-02 17:03:12,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46350 states to 46350 states and 60128 transitions. [2023-12-02 17:03:12,779 INFO L78 Accepts]: Start accepts. Automaton has 46350 states and 60128 transitions. Word has length 134 [2023-12-02 17:03:12,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:03:12,779 INFO L495 AbstractCegarLoop]: Abstraction has 46350 states and 60128 transitions. [2023-12-02 17:03:12,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 17:03:12,779 INFO L276 IsEmpty]: Start isEmpty. Operand 46350 states and 60128 transitions. [2023-12-02 17:03:12,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-12-02 17:03:12,803 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:03:12,803 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:03:12,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-02 17:03:13,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-12-02 17:03:13,004 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:03:13,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:03:13,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1379644959, now seen corresponding path program 1 times [2023-12-02 17:03:13,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:03:13,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069748259] [2023-12-02 17:03:13,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:03:13,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:03:13,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:03:13,147 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 23 proven. 31 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 17:03:13,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:03:13,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069748259] [2023-12-02 17:03:13,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069748259] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:03:13,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475555962] [2023-12-02 17:03:13,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:03:13,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:03:13,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:03:13,149 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:03:13,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-02 17:03:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:03:13,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:03:13,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:03:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:03:13,298 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:03:13,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475555962] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:03:13,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:03:13,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 17:03:13,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473545246] [2023-12-02 17:03:13,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:03:13,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:03:13,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:03:13,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:03:13,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:03:13,300 INFO L87 Difference]: Start difference. First operand 46350 states and 60128 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:03:18,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:03:18,322 INFO L93 Difference]: Finished difference Result 69968 states and 91260 transitions. [2023-12-02 17:03:18,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:03:18,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 135 [2023-12-02 17:03:18,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:03:18,400 INFO L225 Difference]: With dead ends: 69968 [2023-12-02 17:03:18,400 INFO L226 Difference]: Without dead ends: 45387 [2023-12-02 17:03:18,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:03:18,427 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 28 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:03:18,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 400 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:03:18,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45387 states. [2023-12-02 17:03:23,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45387 to 45083. [2023-12-02 17:03:23,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45083 states, 39317 states have (on average 1.3156141109443753) internal successors, (51726), 39464 states have internal predecessors, (51726), 3043 states have call successors, (3043), 2671 states have call predecessors, (3043), 2721 states have return successors, (3736), 2949 states have call predecessors, (3736), 3042 states have call successors, (3736) [2023-12-02 17:03:23,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45083 states to 45083 states and 58505 transitions. [2023-12-02 17:03:23,838 INFO L78 Accepts]: Start accepts. Automaton has 45083 states and 58505 transitions. Word has length 135 [2023-12-02 17:03:23,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:03:23,838 INFO L495 AbstractCegarLoop]: Abstraction has 45083 states and 58505 transitions. [2023-12-02 17:03:23,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:03:23,839 INFO L276 IsEmpty]: Start isEmpty. Operand 45083 states and 58505 transitions. [2023-12-02 17:03:23,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-12-02 17:03:23,863 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:03:23,863 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:03:23,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-12-02 17:03:24,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-12-02 17:03:24,063 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:03:24,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:03:24,064 INFO L85 PathProgramCache]: Analyzing trace with hash -467523220, now seen corresponding path program 1 times [2023-12-02 17:03:24,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:03:24,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932170514] [2023-12-02 17:03:24,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:03:24,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:03:24,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:03:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 25 proven. 31 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 17:03:24,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:03:24,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932170514] [2023-12-02 17:03:24,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932170514] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:03:24,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231377223] [2023-12-02 17:03:24,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:03:24,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:03:24,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:03:24,211 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:03:24,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-02 17:03:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:03:24,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:03:24,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:03:24,397 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 17:03:24,397 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:03:24,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231377223] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:03:24,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:03:24,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2023-12-02 17:03:24,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736310866] [2023-12-02 17:03:24,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:03:24,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:03:24,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:03:24,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:03:24,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:03:24,398 INFO L87 Difference]: Start difference. First operand 45083 states and 58505 transitions. Second operand has 6 states, 5 states have (on average 18.8) internal successors, (94), 6 states have internal predecessors, (94), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 17:03:31,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:03:31,954 INFO L93 Difference]: Finished difference Result 103243 states and 134019 transitions. [2023-12-02 17:03:31,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 17:03:31,955 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 18.8) internal successors, (94), 6 states have internal predecessors, (94), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2023-12-02 17:03:31,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:03:32,061 INFO L225 Difference]: With dead ends: 103243 [2023-12-02 17:03:32,061 INFO L226 Difference]: Without dead ends: 58943 [2023-12-02 17:03:32,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-12-02 17:03:32,098 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 422 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:03:32,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 446 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:03:32,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58943 states. [2023-12-02 17:03:39,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58943 to 58625. [2023-12-02 17:03:39,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58625 states, 50893 states have (on average 1.2938518067317706) internal successors, (65848), 51093 states have internal predecessors, (65848), 4086 states have call successors, (4086), 3578 states have call predecessors, (4086), 3644 states have return successors, (5012), 3955 states have call predecessors, (5012), 4085 states have call successors, (5012) [2023-12-02 17:03:39,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58625 states to 58625 states and 74946 transitions. [2023-12-02 17:03:39,611 INFO L78 Accepts]: Start accepts. Automaton has 58625 states and 74946 transitions. Word has length 136 [2023-12-02 17:03:39,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:03:39,611 INFO L495 AbstractCegarLoop]: Abstraction has 58625 states and 74946 transitions. [2023-12-02 17:03:39,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 18.8) internal successors, (94), 6 states have internal predecessors, (94), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 17:03:39,612 INFO L276 IsEmpty]: Start isEmpty. Operand 58625 states and 74946 transitions. [2023-12-02 17:03:39,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-12-02 17:03:39,638 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:03:39,638 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:03:39,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-12-02 17:03:39,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-12-02 17:03:39,839 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:03:39,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:03:39,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1735382887, now seen corresponding path program 1 times [2023-12-02 17:03:39,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:03:39,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190800966] [2023-12-02 17:03:39,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:03:39,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:03:39,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:03:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 38 proven. 17 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-02 17:03:39,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:03:39,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190800966] [2023-12-02 17:03:39,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190800966] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:03:39,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060369385] [2023-12-02 17:03:39,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:03:39,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:03:39,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:03:39,949 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:03:39,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-02 17:03:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:03:40,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 17:03:40,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:03:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 17:03:40,190 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:03:40,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060369385] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:03:40,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:03:40,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2023-12-02 17:03:40,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158232794] [2023-12-02 17:03:40,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:03:40,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:03:40,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:03:40,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:03:40,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:03:40,192 INFO L87 Difference]: Start difference. First operand 58625 states and 74946 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:03:47,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:03:47,986 INFO L93 Difference]: Finished difference Result 103850 states and 134426 transitions. [2023-12-02 17:03:47,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:03:47,987 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 140 [2023-12-02 17:03:47,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:03:48,125 INFO L225 Difference]: With dead ends: 103850 [2023-12-02 17:03:48,125 INFO L226 Difference]: Without dead ends: 61836 [2023-12-02 17:03:48,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:03:48,173 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 176 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:03:48,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 248 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:03:48,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61836 states. [2023-12-02 17:03:55,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61836 to 61550. [2023-12-02 17:03:55,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61550 states, 53532 states have (on average 1.2842225211088694) internal successors, (68747), 53732 states have internal predecessors, (68747), 4163 states have call successors, (4163), 3787 states have call predecessors, (4163), 3853 states have return successors, (5415), 4032 states have call predecessors, (5415), 4162 states have call successors, (5415) [2023-12-02 17:03:55,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61550 states to 61550 states and 78325 transitions. [2023-12-02 17:03:55,625 INFO L78 Accepts]: Start accepts. Automaton has 61550 states and 78325 transitions. Word has length 140 [2023-12-02 17:03:55,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:03:55,625 INFO L495 AbstractCegarLoop]: Abstraction has 61550 states and 78325 transitions. [2023-12-02 17:03:55,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:03:55,625 INFO L276 IsEmpty]: Start isEmpty. Operand 61550 states and 78325 transitions. [2023-12-02 17:03:55,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-12-02 17:03:55,653 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:03:55,653 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-12-02 17:03:55,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-12-02 17:03:55,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-12-02 17:03:55,854 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:03:55,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:03:55,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1680339685, now seen corresponding path program 1 times [2023-12-02 17:03:55,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:03:55,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771148485] [2023-12-02 17:03:55,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:03:55,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:03:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:03:55,900 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 37 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 17:03:55,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:03:55,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771148485] [2023-12-02 17:03:55,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771148485] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:03:55,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508858236] [2023-12-02 17:03:55,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:03:55,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:03:55,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:03:55,902 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:03:55,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-02 17:03:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:03:56,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:03:56,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:03:56,038 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 17:03:56,039 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:03:56,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508858236] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:03:56,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:03:56,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-12-02 17:03:56,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186775560] [2023-12-02 17:03:56,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:03:56,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:03:56,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:03:56,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:03:56,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:03:56,040 INFO L87 Difference]: Start difference. First operand 61550 states and 78325 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 17:04:03,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:04:03,440 INFO L93 Difference]: Finished difference Result 105648 states and 136507 transitions. [2023-12-02 17:04:03,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:04:03,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 140 [2023-12-02 17:04:03,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:04:03,556 INFO L225 Difference]: With dead ends: 105648 [2023-12-02 17:04:03,557 INFO L226 Difference]: Without dead ends: 61510 [2023-12-02 17:04:03,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:04:03,599 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 106 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:04:03,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 480 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:04:03,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61510 states. [2023-12-02 17:04:11,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61510 to 60618. [2023-12-02 17:04:11,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60618 states, 52600 states have (on average 1.2609695817490494) internal successors, (66327), 52800 states have internal predecessors, (66327), 4163 states have call successors, (4163), 3787 states have call predecessors, (4163), 3853 states have return successors, (5415), 4032 states have call predecessors, (5415), 4162 states have call successors, (5415) [2023-12-02 17:04:11,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60618 states to 60618 states and 75905 transitions. [2023-12-02 17:04:11,648 INFO L78 Accepts]: Start accepts. Automaton has 60618 states and 75905 transitions. Word has length 140 [2023-12-02 17:04:11,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:04:11,648 INFO L495 AbstractCegarLoop]: Abstraction has 60618 states and 75905 transitions. [2023-12-02 17:04:11,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 17:04:11,648 INFO L276 IsEmpty]: Start isEmpty. Operand 60618 states and 75905 transitions. [2023-12-02 17:04:11,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-02 17:04:11,677 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:04:11,678 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 17:04:11,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-02 17:04:11,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-12-02 17:04:11,878 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:04:11,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:04:11,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1961663309, now seen corresponding path program 1 times [2023-12-02 17:04:11,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:04:11,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356023812] [2023-12-02 17:04:11,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:04:11,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:04:11,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:04:12,105 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 51 proven. 20 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:04:12,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:04:12,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356023812] [2023-12-02 17:04:12,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356023812] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:04:12,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265942699] [2023-12-02 17:04:12,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:04:12,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:04:12,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:04:12,107 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:04:12,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-02 17:04:12,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:04:12,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 17:04:12,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:04:12,313 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:04:12,314 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:04:12,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265942699] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:04:12,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:04:12,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2023-12-02 17:04:12,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871739934] [2023-12-02 17:04:12,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:04:12,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:04:12,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:04:12,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:04:12,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:04:12,315 INFO L87 Difference]: Start difference. First operand 60618 states and 75905 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 17:04:22,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:04:22,281 INFO L93 Difference]: Finished difference Result 113705 states and 142945 transitions. [2023-12-02 17:04:22,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 17:04:22,282 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 142 [2023-12-02 17:04:22,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:04:22,411 INFO L225 Difference]: With dead ends: 113705 [2023-12-02 17:04:22,412 INFO L226 Difference]: Without dead ends: 72390 [2023-12-02 17:04:22,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 17:04:22,446 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 254 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:04:22,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 782 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 17:04:22,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72390 states. [2023-12-02 17:04:30,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72390 to 63248. [2023-12-02 17:04:30,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63248 states, 54632 states have (on average 1.2547225069556305) internal successors, (68548), 54846 states have internal predecessors, (68548), 4539 states have call successors, (4539), 4071 states have call predecessors, (4539), 4075 states have return successors, (6031), 4332 states have call predecessors, (6031), 4538 states have call successors, (6031) [2023-12-02 17:04:30,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63248 states to 63248 states and 79118 transitions. [2023-12-02 17:04:30,838 INFO L78 Accepts]: Start accepts. Automaton has 63248 states and 79118 transitions. Word has length 142 [2023-12-02 17:04:30,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:04:30,838 INFO L495 AbstractCegarLoop]: Abstraction has 63248 states and 79118 transitions. [2023-12-02 17:04:30,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 17:04:30,838 INFO L276 IsEmpty]: Start isEmpty. Operand 63248 states and 79118 transitions. [2023-12-02 17:04:30,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-12-02 17:04:30,865 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:04:30,865 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:04:30,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-12-02 17:04:31,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-12-02 17:04:31,066 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:04:31,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:04:31,066 INFO L85 PathProgramCache]: Analyzing trace with hash 357390704, now seen corresponding path program 1 times [2023-12-02 17:04:31,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:04:31,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775754207] [2023-12-02 17:04:31,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:04:31,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:04:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:04:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 17:04:31,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:04:31,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775754207] [2023-12-02 17:04:31,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775754207] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:04:31,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436474105] [2023-12-02 17:04:31,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:04:31,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:04:31,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:04:31,241 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:04:31,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-02 17:04:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:04:31,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 17:04:31,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:04:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 68 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:04:31,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:04:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-12-02 17:04:32,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436474105] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:04:32,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1279864095] [2023-12-02 17:04:32,076 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-12-02 17:04:32,077 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:04:32,077 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:04:32,077 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:04:32,077 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:04:43,550 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 154 for LOIs [2023-12-02 17:04:43,689 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 77 for LOIs [2023-12-02 17:04:43,741 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 127 for LOIs [2023-12-02 17:04:43,834 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 36 for LOIs [2023-12-02 17:04:43,890 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 6 for LOIs [2023-12-02 17:04:43,946 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 158 for LOIs [2023-12-02 17:04:44,129 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:04:59,240 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1775871#(and (<= ~t1_pc~0 1) (not (= ~token~0 (+ ~local~0 4))) (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (= ~m_pc~0 1) (<= 0 |ULTIMATE.start_eval2_~tmp~5#1|) (<= |ULTIMATE.start_eval2_~tmp~5#1| 1) (= ~m_st~0 1) (<= 0 ~t1_pc~0) (not (= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 0)))' at error location [2023-12-02 17:04:59,240 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:04:59,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:04:59,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 16 [2023-12-02 17:04:59,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510881661] [2023-12-02 17:04:59,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:04:59,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 17:04:59,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:04:59,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 17:04:59,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=5815, Unknown=0, NotChecked=0, Total=6320 [2023-12-02 17:04:59,242 INFO L87 Difference]: Start difference. First operand 63248 states and 79118 transitions. Second operand has 16 states, 13 states have (on average 12.538461538461538) internal successors, (163), 14 states have internal predecessors, (163), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 5 states have call predecessors, (30), 6 states have call successors, (30) [2023-12-02 17:05:16,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:05:16,493 INFO L93 Difference]: Finished difference Result 148059 states and 190255 transitions. [2023-12-02 17:05:16,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2023-12-02 17:05:16,494 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 12.538461538461538) internal successors, (163), 14 states have internal predecessors, (163), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 5 states have call predecessors, (30), 6 states have call successors, (30) Word has length 139 [2023-12-02 17:05:16,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:05:16,674 INFO L225 Difference]: With dead ends: 148059 [2023-12-02 17:05:16,674 INFO L226 Difference]: Without dead ends: 97685 [2023-12-02 17:05:16,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 391 SyntacticMatches, 8 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15178 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=2544, Invalid=31866, Unknown=0, NotChecked=0, Total=34410 [2023-12-02 17:05:16,728 INFO L413 NwaCegarLoop]: 823 mSDtfsCounter, 2796 mSDsluCounter, 5106 mSDsCounter, 0 mSdLazyCounter, 2702 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2813 SdHoareTripleChecker+Valid, 5929 SdHoareTripleChecker+Invalid, 3246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 2702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:05:16,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2813 Valid, 5929 Invalid, 3246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 2702 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-02 17:05:16,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97685 states. [2023-12-02 17:05:25,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97685 to 57455. [2023-12-02 17:05:25,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57455 states, 49953 states have (on average 1.253858627109483) internal successors, (62634), 50233 states have internal predecessors, (62634), 3802 states have call successors, (3802), 3580 states have call predecessors, (3802), 3698 states have return successors, (5418), 3643 states have call predecessors, (5418), 3801 states have call successors, (5418) [2023-12-02 17:05:25,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57455 states to 57455 states and 71854 transitions. [2023-12-02 17:05:25,323 INFO L78 Accepts]: Start accepts. Automaton has 57455 states and 71854 transitions. Word has length 139 [2023-12-02 17:05:25,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:05:25,324 INFO L495 AbstractCegarLoop]: Abstraction has 57455 states and 71854 transitions. [2023-12-02 17:05:25,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 12.538461538461538) internal successors, (163), 14 states have internal predecessors, (163), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 5 states have call predecessors, (30), 6 states have call successors, (30) [2023-12-02 17:05:25,324 INFO L276 IsEmpty]: Start isEmpty. Operand 57455 states and 71854 transitions. [2023-12-02 17:05:25,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-12-02 17:05:25,346 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:05:25,347 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:05:25,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-12-02 17:05:25,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-12-02 17:05:25,547 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:05:25,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:05:25,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1186693689, now seen corresponding path program 1 times [2023-12-02 17:05:25,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:05:25,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385581262] [2023-12-02 17:05:25,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:05:25,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:05:25,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:05:25,663 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:05:25,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:05:25,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385581262] [2023-12-02 17:05:25,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385581262] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:05:25,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354387325] [2023-12-02 17:05:25,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:05:25,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:05:25,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:05:25,665 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:05:25,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-02 17:05:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:05:25,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 17:05:25,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:05:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-02 17:05:25,814 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:05:25,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354387325] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:05:25,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:05:25,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-12-02 17:05:25,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529570012] [2023-12-02 17:05:25,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:05:25,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:05:25,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:05:25,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:05:25,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:05:25,816 INFO L87 Difference]: Start difference. First operand 57455 states and 71854 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 17:05:33,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:05:33,945 INFO L93 Difference]: Finished difference Result 110715 states and 139795 transitions. [2023-12-02 17:05:33,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:05:33,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 140 [2023-12-02 17:05:33,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:05:34,068 INFO L225 Difference]: With dead ends: 110715 [2023-12-02 17:05:34,068 INFO L226 Difference]: Without dead ends: 66045 [2023-12-02 17:05:34,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-12-02 17:05:34,105 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 210 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:05:34,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 625 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:05:34,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66045 states. [2023-12-02 17:05:42,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66045 to 63460. [2023-12-02 17:05:42,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63460 states, 55009 states have (on average 1.2498136668545148) internal successors, (68751), 55461 states have internal predecessors, (68751), 4145 states have call successors, (4145), 3875 states have call predecessors, (4145), 4304 states have return successors, (7212), 4125 states have call predecessors, (7212), 4144 states have call successors, (7212) [2023-12-02 17:05:42,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63460 states to 63460 states and 80108 transitions. [2023-12-02 17:05:42,605 INFO L78 Accepts]: Start accepts. Automaton has 63460 states and 80108 transitions. Word has length 140 [2023-12-02 17:05:42,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:05:42,605 INFO L495 AbstractCegarLoop]: Abstraction has 63460 states and 80108 transitions. [2023-12-02 17:05:42,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 17:05:42,606 INFO L276 IsEmpty]: Start isEmpty. Operand 63460 states and 80108 transitions. [2023-12-02 17:05:42,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-12-02 17:05:42,630 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:05:42,630 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:05:42,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-12-02 17:05:42,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-12-02 17:05:42,831 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:05:42,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:05:42,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1596986697, now seen corresponding path program 1 times [2023-12-02 17:05:42,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:05:42,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777516072] [2023-12-02 17:05:42,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:05:42,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:05:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:05:42,880 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 38 proven. 8 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 17:05:42,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:05:42,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777516072] [2023-12-02 17:05:42,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777516072] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:05:42,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777055096] [2023-12-02 17:05:42,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:05:42,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:05:42,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:05:42,882 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:05:42,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-02 17:05:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:05:43,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:05:43,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:05:43,041 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:05:43,041 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:05:43,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777055096] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:05:43,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:05:43,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-12-02 17:05:43,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158431958] [2023-12-02 17:05:43,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:05:43,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:05:43,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:05:43,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:05:43,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:05:43,043 INFO L87 Difference]: Start difference. First operand 63460 states and 80108 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 17:05:51,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:05:51,316 INFO L93 Difference]: Finished difference Result 113960 states and 147562 transitions. [2023-12-02 17:05:51,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:05:51,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 140 [2023-12-02 17:05:51,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:05:51,443 INFO L225 Difference]: With dead ends: 113960 [2023-12-02 17:05:51,443 INFO L226 Difference]: Without dead ends: 63334 [2023-12-02 17:05:51,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:05:51,497 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 106 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:05:51,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 480 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:05:51,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63334 states. [2023-12-02 17:06:00,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63334 to 62600. [2023-12-02 17:06:00,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62600 states, 54149 states have (on average 1.2218323514746348) internal successors, (66161), 54601 states have internal predecessors, (66161), 4145 states have call successors, (4145), 3875 states have call predecessors, (4145), 4304 states have return successors, (7212), 4125 states have call predecessors, (7212), 4144 states have call successors, (7212) [2023-12-02 17:06:00,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62600 states to 62600 states and 77518 transitions. [2023-12-02 17:06:00,455 INFO L78 Accepts]: Start accepts. Automaton has 62600 states and 77518 transitions. Word has length 140 [2023-12-02 17:06:00,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:06:00,456 INFO L495 AbstractCegarLoop]: Abstraction has 62600 states and 77518 transitions. [2023-12-02 17:06:00,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 17:06:00,456 INFO L276 IsEmpty]: Start isEmpty. Operand 62600 states and 77518 transitions. [2023-12-02 17:06:00,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-12-02 17:06:00,481 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:06:00,481 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:06:00,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-12-02 17:06:00,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-12-02 17:06:00,682 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:06:00,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:06:00,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1029075618, now seen corresponding path program 1 times [2023-12-02 17:06:00,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:06:00,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060111144] [2023-12-02 17:06:00,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:06:00,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:06:00,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:06:00,788 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 44 proven. 17 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:06:00,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:06:00,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060111144] [2023-12-02 17:06:00,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060111144] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:06:00,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460654077] [2023-12-02 17:06:00,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:06:00,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:06:00,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:06:00,790 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:06:00,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-02 17:06:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:06:00,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 17:06:00,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:06:00,961 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 17:06:00,961 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:06:00,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460654077] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:06:00,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:06:00,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2023-12-02 17:06:00,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131101215] [2023-12-02 17:06:00,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:06:00,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:06:00,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:06:00,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:06:00,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:06:00,963 INFO L87 Difference]: Start difference. First operand 62600 states and 77518 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:06:09,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:06:09,509 INFO L93 Difference]: Finished difference Result 114929 states and 146331 transitions. [2023-12-02 17:06:09,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:06:09,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 140 [2023-12-02 17:06:09,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:06:09,637 INFO L225 Difference]: With dead ends: 114929 [2023-12-02 17:06:09,637 INFO L226 Difference]: Without dead ends: 65197 [2023-12-02 17:06:09,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:06:09,689 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 182 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:06:09,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 252 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:06:09,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65197 states. [2023-12-02 17:06:18,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65197 to 64627. [2023-12-02 17:06:18,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64627 states, 55938 states have (on average 1.2074618327433946) internal successors, (67543), 56416 states have internal predecessors, (67543), 4205 states have call successors, (4205), 4007 states have call predecessors, (4205), 4482 states have return successors, (7646), 4205 states have call predecessors, (7646), 4204 states have call successors, (7646) [2023-12-02 17:06:18,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64627 states to 64627 states and 79394 transitions. [2023-12-02 17:06:18,691 INFO L78 Accepts]: Start accepts. Automaton has 64627 states and 79394 transitions. Word has length 140 [2023-12-02 17:06:18,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:06:18,691 INFO L495 AbstractCegarLoop]: Abstraction has 64627 states and 79394 transitions. [2023-12-02 17:06:18,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:06:18,691 INFO L276 IsEmpty]: Start isEmpty. Operand 64627 states and 79394 transitions. [2023-12-02 17:06:18,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 17:06:18,716 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:06:18,716 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 17:06:18,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-12-02 17:06:18,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-12-02 17:06:18,917 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:06:18,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:06:18,917 INFO L85 PathProgramCache]: Analyzing trace with hash -268919858, now seen corresponding path program 1 times [2023-12-02 17:06:18,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:06:18,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502175907] [2023-12-02 17:06:18,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:06:18,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:06:18,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:06:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 33 proven. 7 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 17:06:19,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:06:19,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502175907] [2023-12-02 17:06:19,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502175907] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:06:19,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692229755] [2023-12-02 17:06:19,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:06:19,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:06:19,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:06:19,320 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:06:19,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-02 17:06:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:06:19,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:06:19,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:06:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 17:06:19,560 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:06:19,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692229755] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:06:19,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:06:19,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 15 [2023-12-02 17:06:19,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679383405] [2023-12-02 17:06:19,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:06:19,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:06:19,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:06:19,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:06:19,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-12-02 17:06:19,562 INFO L87 Difference]: Start difference. First operand 64627 states and 79394 transitions. Second operand has 6 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 17:06:28,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:06:28,031 INFO L93 Difference]: Finished difference Result 110382 states and 137416 transitions. [2023-12-02 17:06:28,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 17:06:28,031 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 137 [2023-12-02 17:06:28,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:06:28,158 INFO L225 Difference]: With dead ends: 110382 [2023-12-02 17:06:28,158 INFO L226 Difference]: Without dead ends: 60501 [2023-12-02 17:06:28,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-12-02 17:06:28,212 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 352 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:06:28,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 217 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:06:28,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60501 states. [2023-12-02 17:06:36,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60501 to 56362. [2023-12-02 17:06:36,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56362 states, 48928 states have (on average 1.195000817527796) internal successors, (58469), 49244 states have internal predecessors, (58469), 3634 states have call successors, (3634), 3531 states have call predecessors, (3634), 3798 states have return successors, (5409), 3588 states have call predecessors, (5409), 3633 states have call successors, (5409) [2023-12-02 17:06:36,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56362 states to 56362 states and 67512 transitions. [2023-12-02 17:06:36,238 INFO L78 Accepts]: Start accepts. Automaton has 56362 states and 67512 transitions. Word has length 137 [2023-12-02 17:06:36,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:06:36,239 INFO L495 AbstractCegarLoop]: Abstraction has 56362 states and 67512 transitions. [2023-12-02 17:06:36,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 17:06:36,239 INFO L276 IsEmpty]: Start isEmpty. Operand 56362 states and 67512 transitions. [2023-12-02 17:06:36,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-12-02 17:06:36,261 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:06:36,261 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:06:36,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-12-02 17:06:36,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:06:36,462 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:06:36,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:06:36,462 INFO L85 PathProgramCache]: Analyzing trace with hash 75625775, now seen corresponding path program 1 times [2023-12-02 17:06:36,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:06:36,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099450807] [2023-12-02 17:06:36,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:06:36,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:06:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:06:36,735 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 17:06:36,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:06:36,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099450807] [2023-12-02 17:06:36,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099450807] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:06:36,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795187155] [2023-12-02 17:06:36,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:06:36,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:06:36,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:06:36,737 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:06:36,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-02 17:06:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:06:36,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 17:06:36,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:06:37,034 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 66 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:06:37,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:06:37,652 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-12-02 17:06:37,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795187155] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:06:37,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [489227244] [2023-12-02 17:06:37,655 INFO L159 IcfgInterpreter]: Started Sifa with 84 locations of interest [2023-12-02 17:06:37,655 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:06:37,655 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:06:37,655 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:06:37,655 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:06:51,511 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 9 for LOIs [2023-12-02 17:06:51,520 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 79 for LOIs [2023-12-02 17:06:51,577 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 129 for LOIs [2023-12-02 17:06:51,677 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 39 for LOIs [2023-12-02 17:06:51,880 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 9 for LOIs [2023-12-02 17:06:52,043 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 160 for LOIs [2023-12-02 17:06:52,220 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:07:11,031 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2848068#(and (<= ~t1_pc~0 1) (not (= ~token~0 (+ ~local~0 4))) (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (<= 0 ~t2_pc~0) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (= ~m_pc~0 1) (<= ~t2_pc~0 1) (<= 0 |ULTIMATE.start_eval2_~tmp~5#1|) (<= |ULTIMATE.start_eval2_~tmp~5#1| 1) (= ~m_st~0 1) (<= 0 ~t1_pc~0) (not (= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 0)))' at error location [2023-12-02 17:07:11,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:07:11,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:07:11,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 6] total 17 [2023-12-02 17:07:11,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532896640] [2023-12-02 17:07:11,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:07:11,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 17:07:11,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:07:11,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 17:07:11,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=6143, Unknown=0, NotChecked=0, Total=6642 [2023-12-02 17:07:11,034 INFO L87 Difference]: Start difference. First operand 56362 states and 67512 transitions. Second operand has 17 states, 14 states have (on average 11.857142857142858) internal successors, (166), 15 states have internal predecessors, (166), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 5 states have call predecessors, (30), 6 states have call successors, (30) [2023-12-02 17:07:29,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:07:29,571 INFO L93 Difference]: Finished difference Result 115682 states and 144042 transitions. [2023-12-02 17:07:29,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2023-12-02 17:07:29,572 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 11.857142857142858) internal successors, (166), 15 states have internal predecessors, (166), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 5 states have call predecessors, (30), 6 states have call successors, (30) Word has length 141 [2023-12-02 17:07:29,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:07:29,728 INFO L225 Difference]: With dead ends: 115682 [2023-12-02 17:07:29,728 INFO L226 Difference]: Without dead ends: 81273 [2023-12-02 17:07:29,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 424 SyntacticMatches, 7 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24975 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=3997, Invalid=51935, Unknown=0, NotChecked=0, Total=55932 [2023-12-02 17:07:29,780 INFO L413 NwaCegarLoop]: 822 mSDtfsCounter, 2553 mSDsluCounter, 5648 mSDsCounter, 0 mSdLazyCounter, 3664 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2567 SdHoareTripleChecker+Valid, 6470 SdHoareTripleChecker+Invalid, 4170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 3664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:07:29,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2567 Valid, 6470 Invalid, 4170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 3664 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-02 17:07:29,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81273 states. [2023-12-02 17:07:37,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81273 to 48929. [2023-12-02 17:07:37,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48929 states, 42457 states have (on average 1.1895800456932897) internal successors, (50506), 42801 states have internal predecessors, (50506), 3118 states have call successors, (3118), 3069 states have call predecessors, (3118), 3352 states have return successors, (4813), 3060 states have call predecessors, (4813), 3117 states have call successors, (4813) [2023-12-02 17:07:37,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48929 states to 48929 states and 58437 transitions. [2023-12-02 17:07:37,512 INFO L78 Accepts]: Start accepts. Automaton has 48929 states and 58437 transitions. Word has length 141 [2023-12-02 17:07:37,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:07:37,513 INFO L495 AbstractCegarLoop]: Abstraction has 48929 states and 58437 transitions. [2023-12-02 17:07:37,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 11.857142857142858) internal successors, (166), 15 states have internal predecessors, (166), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 5 states have call predecessors, (30), 6 states have call successors, (30) [2023-12-02 17:07:37,513 INFO L276 IsEmpty]: Start isEmpty. Operand 48929 states and 58437 transitions. [2023-12-02 17:07:37,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-12-02 17:07:37,532 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:07:37,532 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:07:37,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-12-02 17:07:37,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:07:37,733 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:07:37,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:07:37,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1863066173, now seen corresponding path program 1 times [2023-12-02 17:07:37,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:07:37,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339994844] [2023-12-02 17:07:37,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:07:37,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:07:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:07:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 54 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 17:07:37,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:07:37,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339994844] [2023-12-02 17:07:37,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339994844] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:07:37,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518296888] [2023-12-02 17:07:37,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:07:37,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:07:37,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:07:37,846 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:07:37,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-02 17:07:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:07:38,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 17:07:38,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:07:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:07:38,092 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:07:38,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518296888] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:07:38,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:07:38,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2023-12-02 17:07:38,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567704464] [2023-12-02 17:07:38,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:07:38,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:07:38,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:07:38,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:07:38,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:07:38,094 INFO L87 Difference]: Start difference. First operand 48929 states and 58437 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-02 17:07:48,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:07:48,272 INFO L93 Difference]: Finished difference Result 109376 states and 131958 transitions. [2023-12-02 17:07:48,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:07:48,272 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 138 [2023-12-02 17:07:48,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:07:48,403 INFO L225 Difference]: With dead ends: 109376 [2023-12-02 17:07:48,403 INFO L226 Difference]: Without dead ends: 69614 [2023-12-02 17:07:48,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:07:48,442 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 343 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:07:48,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 398 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:07:48,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69614 states. [2023-12-02 17:07:58,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69614 to 66761. [2023-12-02 17:07:58,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66761 states, 57927 states have (on average 1.1884958654858702) internal successors, (68846), 58364 states have internal predecessors, (68846), 4160 states have call successors, (4160), 4114 states have call predecessors, (4160), 4672 states have return successors, (6487), 4284 states have call predecessors, (6487), 4159 states have call successors, (6487) [2023-12-02 17:07:58,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66761 states to 66761 states and 79493 transitions. [2023-12-02 17:07:58,785 INFO L78 Accepts]: Start accepts. Automaton has 66761 states and 79493 transitions. Word has length 138 [2023-12-02 17:07:58,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:07:58,786 INFO L495 AbstractCegarLoop]: Abstraction has 66761 states and 79493 transitions. [2023-12-02 17:07:58,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-02 17:07:58,786 INFO L276 IsEmpty]: Start isEmpty. Operand 66761 states and 79493 transitions. [2023-12-02 17:07:58,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-12-02 17:07:58,802 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:07:58,802 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-12-02 17:07:58,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-12-02 17:07:59,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:07:59,003 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:07:59,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:07:59,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1910771925, now seen corresponding path program 1 times [2023-12-02 17:07:59,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:07:59,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844473611] [2023-12-02 17:07:59,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:07:59,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:07:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:07:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 17:07:59,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:07:59,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844473611] [2023-12-02 17:07:59,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844473611] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:07:59,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:07:59,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 17:07:59,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583418158] [2023-12-02 17:07:59,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:07:59,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:07:59,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:07:59,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:07:59,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:07:59,135 INFO L87 Difference]: Start difference. First operand 66761 states and 79493 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:08:10,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:08:10,079 INFO L93 Difference]: Finished difference Result 128510 states and 152757 transitions. [2023-12-02 17:08:10,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 17:08:10,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 139 [2023-12-02 17:08:10,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:08:10,167 INFO L225 Difference]: With dead ends: 128510 [2023-12-02 17:08:10,167 INFO L226 Difference]: Without dead ends: 56016 [2023-12-02 17:08:10,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:08:10,217 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 128 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:08:10,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 580 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:08:10,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56016 states. [2023-12-02 17:08:18,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56016 to 52445. [2023-12-02 17:08:18,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52445 states, 45330 states have (on average 1.171431722920803) internal successors, (53101), 45684 states have internal predecessors, (53101), 3376 states have call successors, (3376), 3322 states have call predecessors, (3376), 3737 states have return successors, (5123), 3440 states have call predecessors, (5123), 3375 states have call successors, (5123) [2023-12-02 17:08:18,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52445 states to 52445 states and 61600 transitions. [2023-12-02 17:08:18,167 INFO L78 Accepts]: Start accepts. Automaton has 52445 states and 61600 transitions. Word has length 139 [2023-12-02 17:08:18,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:08:18,167 INFO L495 AbstractCegarLoop]: Abstraction has 52445 states and 61600 transitions. [2023-12-02 17:08:18,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:08:18,167 INFO L276 IsEmpty]: Start isEmpty. Operand 52445 states and 61600 transitions. [2023-12-02 17:08:18,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-12-02 17:08:18,175 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:08:18,175 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:08:18,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-12-02 17:08:18,175 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:08:18,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:08:18,176 INFO L85 PathProgramCache]: Analyzing trace with hash 100680613, now seen corresponding path program 1 times [2023-12-02 17:08:18,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:08:18,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723937352] [2023-12-02 17:08:18,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:08:18,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:08:18,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:08:18,349 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 17:08:18,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:08:18,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723937352] [2023-12-02 17:08:18,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723937352] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:08:18,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965362987] [2023-12-02 17:08:18,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:08:18,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:08:18,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:08:18,351 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:08:18,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-02 17:08:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:08:18,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 17:08:18,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:08:18,684 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 66 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:08:18,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:08:19,298 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-12-02 17:08:19,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965362987] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:08:19,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1535297611] [2023-12-02 17:08:19,300 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2023-12-02 17:08:19,300 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:08:19,300 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:08:19,300 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:08:19,300 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:08:32,049 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 154 for LOIs [2023-12-02 17:08:32,189 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 81 for LOIs [2023-12-02 17:08:32,252 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 131 for LOIs [2023-12-02 17:08:32,355 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 42 for LOIs [2023-12-02 17:08:32,464 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 12 for LOIs [2023-12-02 17:08:32,709 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 162 for LOIs [2023-12-02 17:08:32,917 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:08:50,577 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3466242#(and (<= ~t1_pc~0 1) (not (= ~token~0 (+ ~local~0 4))) (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (<= 0 ~t2_pc~0) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (= ~m_pc~0 1) (<= ~t2_pc~0 1) (<= 0 |ULTIMATE.start_eval2_~tmp~5#1|) (<= ~t3_pc~0 1) (<= |ULTIMATE.start_eval2_~tmp~5#1| 1) (= ~m_st~0 1) (<= 0 ~t3_pc~0) (<= 0 ~t1_pc~0) (not (= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 0)))' at error location [2023-12-02 17:08:50,577 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:08:50,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:08:50,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 6] total 18 [2023-12-02 17:08:50,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677693315] [2023-12-02 17:08:50,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:08:50,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 17:08:50,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:08:50,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 17:08:50,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=520, Invalid=6790, Unknown=0, NotChecked=0, Total=7310 [2023-12-02 17:08:50,579 INFO L87 Difference]: Start difference. First operand 52445 states and 61600 transitions. Second operand has 18 states, 15 states have (on average 11.333333333333334) internal successors, (170), 16 states have internal predecessors, (170), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 5 states have call predecessors, (30), 6 states have call successors, (30) [2023-12-02 17:09:07,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:09:07,302 INFO L93 Difference]: Finished difference Result 96467 states and 116669 transitions. [2023-12-02 17:09:07,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2023-12-02 17:09:07,302 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 11.333333333333334) internal successors, (170), 16 states have internal predecessors, (170), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 5 states have call predecessors, (30), 6 states have call successors, (30) Word has length 144 [2023-12-02 17:09:07,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:09:07,405 INFO L225 Difference]: With dead ends: 96467 [2023-12-02 17:09:07,406 INFO L226 Difference]: Without dead ends: 68232 [2023-12-02 17:09:07,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 415 SyntacticMatches, 10 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22493 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=3656, Invalid=47194, Unknown=0, NotChecked=0, Total=50850 [2023-12-02 17:09:07,442 INFO L413 NwaCegarLoop]: 782 mSDtfsCounter, 2196 mSDsluCounter, 4971 mSDsCounter, 0 mSdLazyCounter, 3545 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2208 SdHoareTripleChecker+Valid, 5753 SdHoareTripleChecker+Invalid, 3971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 3545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:09:07,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2208 Valid, 5753 Invalid, 3971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 3545 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-02 17:09:07,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68232 states. [2023-12-02 17:09:14,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68232 to 44801. [2023-12-02 17:09:14,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44801 states, 38642 states have (on average 1.1666321618963822) internal successors, (45081), 38975 states have internal predecessors, (45081), 2906 states have call successors, (2906), 2868 states have call predecessors, (2906), 3251 states have return successors, (4542), 2959 states have call predecessors, (4542), 2905 states have call successors, (4542) [2023-12-02 17:09:14,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44801 states to 44801 states and 52529 transitions. [2023-12-02 17:09:14,776 INFO L78 Accepts]: Start accepts. Automaton has 44801 states and 52529 transitions. Word has length 144 [2023-12-02 17:09:14,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:09:14,776 INFO L495 AbstractCegarLoop]: Abstraction has 44801 states and 52529 transitions. [2023-12-02 17:09:14,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 11.333333333333334) internal successors, (170), 16 states have internal predecessors, (170), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 5 states have call predecessors, (30), 6 states have call successors, (30) [2023-12-02 17:09:14,777 INFO L276 IsEmpty]: Start isEmpty. Operand 44801 states and 52529 transitions. [2023-12-02 17:09:14,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-12-02 17:09:14,785 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:09:14,785 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:09:14,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-12-02 17:09:14,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-12-02 17:09:14,986 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:09:14,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:09:14,986 INFO L85 PathProgramCache]: Analyzing trace with hash -38808543, now seen corresponding path program 1 times [2023-12-02 17:09:14,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:09:14,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490270978] [2023-12-02 17:09:14,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:09:14,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:09:15,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:09:15,579 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 17:09:15,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:09:15,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490270978] [2023-12-02 17:09:15,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490270978] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:09:15,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057770464] [2023-12-02 17:09:15,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:09:15,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:09:15,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:09:15,580 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:09:15,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-12-02 17:09:15,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:09:15,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-02 17:09:15,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:09:16,080 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 62 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 17:09:16,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:09:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 33 proven. 7 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-12-02 17:09:16,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057770464] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:09:16,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1744815963] [2023-12-02 17:09:16,615 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-12-02 17:09:16,615 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:09:16,616 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:09:16,616 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:09:16,616 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:09:45,846 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 1 for LOIs [2023-12-02 17:09:45,852 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 1 for LOIs [2023-12-02 17:09:45,862 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 1 for LOIs [2023-12-02 17:09:45,863 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 33 for LOIs [2023-12-02 17:09:46,063 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 1 for LOIs [2023-12-02 17:09:46,232 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 152 for LOIs [2023-12-02 17:09:46,333 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:10:25,725 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3635051#(and (not (= ~token~0 (+ ~local~0 4))) (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (= ~m_pc~0 1) (<= 0 |ULTIMATE.start_eval2_~tmp~5#1|) (<= |ULTIMATE.start_eval2_~tmp~5#1| 1) (= ~m_st~0 1) (not (= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 0)))' at error location [2023-12-02 17:10:25,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:10:25,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:10:25,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 12] total 36 [2023-12-02 17:10:25,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304558949] [2023-12-02 17:10:25,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:10:25,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-02 17:10:25,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:10:25,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-02 17:10:25,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=10499, Unknown=0, NotChecked=0, Total=11130 [2023-12-02 17:10:25,728 INFO L87 Difference]: Start difference. First operand 44801 states and 52529 transitions. Second operand has 36 states, 24 states have (on average 10.291666666666666) internal successors, (247), 27 states have internal predecessors, (247), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2023-12-02 17:10:50,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:10:50,021 INFO L93 Difference]: Finished difference Result 128771 states and 151639 transitions. [2023-12-02 17:10:50,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-12-02 17:10:50,022 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 24 states have (on average 10.291666666666666) internal successors, (247), 27 states have internal predecessors, (247), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) Word has length 146 [2023-12-02 17:10:50,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:10:50,238 INFO L225 Difference]: With dead ends: 128771 [2023-12-02 17:10:50,238 INFO L226 Difference]: Without dead ends: 107356 [2023-12-02 17:10:50,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13380 ImplicationChecksByTransitivity, 42.6s TimeCoverageRelationStatistics Valid=3403, Invalid=33653, Unknown=0, NotChecked=0, Total=37056 [2023-12-02 17:10:50,270 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 8222 mSDsluCounter, 1805 mSDsCounter, 0 mSdLazyCounter, 4278 mSolverCounterSat, 2440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8222 SdHoareTripleChecker+Valid, 1972 SdHoareTripleChecker+Invalid, 6718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2440 IncrementalHoareTripleChecker+Valid, 4278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:10:50,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8222 Valid, 1972 Invalid, 6718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2440 Valid, 4278 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-12-02 17:10:50,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107356 states. [2023-12-02 17:11:01,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107356 to 66340. [2023-12-02 17:11:01,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66340 states, 57003 states have (on average 1.169061277476624) internal successors, (66640), 57476 states have internal predecessors, (66640), 4409 states have call successors, (4409), 4338 states have call predecessors, (4409), 4926 states have return successors, (6482), 4527 states have call predecessors, (6482), 4408 states have call successors, (6482) [2023-12-02 17:11:01,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66340 states to 66340 states and 77531 transitions. [2023-12-02 17:11:01,442 INFO L78 Accepts]: Start accepts. Automaton has 66340 states and 77531 transitions. Word has length 146 [2023-12-02 17:11:01,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:11:01,442 INFO L495 AbstractCegarLoop]: Abstraction has 66340 states and 77531 transitions. [2023-12-02 17:11:01,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 24 states have (on average 10.291666666666666) internal successors, (247), 27 states have internal predecessors, (247), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2023-12-02 17:11:01,443 INFO L276 IsEmpty]: Start isEmpty. Operand 66340 states and 77531 transitions. [2023-12-02 17:11:01,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-12-02 17:11:01,450 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:11:01,450 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:11:01,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-12-02 17:11:01,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-12-02 17:11:01,650 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:11:01,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:11:01,651 INFO L85 PathProgramCache]: Analyzing trace with hash -882107605, now seen corresponding path program 1 times [2023-12-02 17:11:01,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:11:01,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643240414] [2023-12-02 17:11:01,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:11:01,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:11:01,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:11:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 17:11:02,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:11:02,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643240414] [2023-12-02 17:11:02,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643240414] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:11:02,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227063473] [2023-12-02 17:11:02,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:11:02,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:11:02,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:11:02,142 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:11:02,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82a62d6-ee2e-4381-ada1-be5b36bfac24/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-12-02 17:11:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:11:02,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-02 17:11:02,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:11:02,514 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 66 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 17:11:02,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:11:03,083 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 41 proven. 7 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-12-02 17:11:03,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227063473] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:11:03,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2008959672] [2023-12-02 17:11:03,085 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-12-02 17:11:03,085 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:11:03,086 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:11:03,086 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:11:03,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:11:27,969 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 1 for LOIs [2023-12-02 17:11:27,975 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 1 for LOIs [2023-12-02 17:11:27,984 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 1 for LOIs [2023-12-02 17:11:27,985 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 33 for LOIs [2023-12-02 17:11:28,132 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 1 for LOIs [2023-12-02 17:11:28,241 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 152 for LOIs [2023-12-02 17:11:28,343 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:11:57,031 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3866445#(and (not (= ~token~0 (+ ~local~0 4))) (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (= ~m_pc~0 1) (<= 0 |ULTIMATE.start_eval2_~tmp~5#1|) (<= |ULTIMATE.start_eval2_~tmp~5#1| 1) (= ~m_st~0 1) (not (= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 0)))' at error location [2023-12-02 17:11:57,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:11:57,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:11:57,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 12] total 33 [2023-12-02 17:11:57,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345154971] [2023-12-02 17:11:57,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:11:57,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-02 17:11:57,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:11:57,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-02 17:11:57,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=9905, Unknown=0, NotChecked=0, Total=10506 [2023-12-02 17:11:57,034 INFO L87 Difference]: Start difference. First operand 66340 states and 77531 transitions. Second operand has 33 states, 21 states have (on average 11.857142857142858) internal successors, (249), 26 states have internal predecessors, (249), 13 states have call successors, (39), 9 states have call predecessors, (39), 18 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40)