./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-2.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_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/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_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/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_76fa18d9-2292-4f81-b29b-89a7a65f8d44/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 b3322c0c768700658989b53a570d5dd58dc6c9ba5f33ff303fa538b570ca8619 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:37:15,243 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:37:15,303 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 12:37:15,308 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:37:15,309 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:37:15,329 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:37:15,330 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:37:15,330 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:37:15,331 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:37:15,331 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:37:15,332 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:37:15,332 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:37:15,333 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:37:15,333 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 12:37:15,334 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:37:15,334 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:37:15,335 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 12:37:15,335 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 12:37:15,335 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:37:15,336 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 12:37:15,336 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 12:37:15,337 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 12:37:15,338 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:37:15,338 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 12:37:15,339 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 12:37:15,339 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:37:15,339 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 12:37:15,339 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:37:15,340 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 12:37:15,340 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:37:15,341 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 12:37:15,341 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 12:37:15,341 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 12:37:15,341 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:37:15,342 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:37:15,342 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:37:15,342 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:37:15,342 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:37:15,343 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:37:15,343 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:37:15,343 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 12:37:15,343 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 12:37:15,344 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 12:37:15,344 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:37:15,344 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 12:37:15,344 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:37:15,345 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:37:15,345 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_76fa18d9-2292-4f81-b29b-89a7a65f8d44/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3322c0c768700658989b53a570d5dd58dc6c9ba5f33ff303fa538b570ca8619 [2023-12-02 12:37:15,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:37:15,581 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:37:15,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:37:15,585 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:37:15,585 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:37:15,586 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-2.c [2023-12-02 12:37:18,372 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:37:18,594 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:37:18,595 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-2.c [2023-12-02 12:37:18,613 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/data/6736dfd67/59d2fa2e1bf64235878fb7dd1d0057ce/FLAG24cc76236 [2023-12-02 12:37:18,626 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/data/6736dfd67/59d2fa2e1bf64235878fb7dd1d0057ce [2023-12-02 12:37:18,628 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:37:18,629 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:37:18,631 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:37:18,631 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:37:18,635 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:37:18,636 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:37:18" (1/1) ... [2023-12-02 12:37:18,637 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d705a18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18, skipping insertion in model container [2023-12-02 12:37:18,637 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:37:18" (1/1) ... [2023-12-02 12:37:18,693 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:37:18,816 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_76fa18d9-2292-4f81-b29b-89a7a65f8d44/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-2.c[914,927] [2023-12-02 12:37:18,870 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_76fa18d9-2292-4f81-b29b-89a7a65f8d44/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-2.c[7115,7128] [2023-12-02 12:37:18,970 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:37:18,984 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:37:18,993 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_76fa18d9-2292-4f81-b29b-89a7a65f8d44/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-2.c[914,927] [2023-12-02 12:37:19,011 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_76fa18d9-2292-4f81-b29b-89a7a65f8d44/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-2.c[7115,7128] [2023-12-02 12:37:19,063 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:37:19,087 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:37:19,087 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:19 WrapperNode [2023-12-02 12:37:19,087 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:37:19,088 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:37:19,088 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:37:19,088 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:37:19,094 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:19" (1/1) ... [2023-12-02 12:37:19,110 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:19" (1/1) ... [2023-12-02 12:37:19,172 INFO L138 Inliner]: procedures = 75, calls = 90, calls flagged for inlining = 44, calls inlined = 44, statements flattened = 1010 [2023-12-02 12:37:19,173 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:37:19,173 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:37:19,174 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:37:19,174 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:37:19,182 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:19" (1/1) ... [2023-12-02 12:37:19,182 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:19" (1/1) ... [2023-12-02 12:37:19,186 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:19" (1/1) ... [2023-12-02 12:37:19,186 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:19" (1/1) ... [2023-12-02 12:37:19,202 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:19" (1/1) ... [2023-12-02 12:37:19,216 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:19" (1/1) ... [2023-12-02 12:37:19,220 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:19" (1/1) ... [2023-12-02 12:37:19,225 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:19" (1/1) ... [2023-12-02 12:37:19,232 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:37:19,233 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:37:19,233 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:37:19,234 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:37:19,234 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:19" (1/1) ... [2023-12-02 12:37:19,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:37:19,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:37:19,270 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:37:19,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:37:19,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 12:37:19,304 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 12:37:19,304 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 12:37:19,304 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-12-02 12:37:19,305 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-12-02 12:37:19,305 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-12-02 12:37:19,305 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-12-02 12:37:19,305 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-12-02 12:37:19,305 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-12-02 12:37:19,306 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-12-02 12:37:19,306 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-12-02 12:37:19,306 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-12-02 12:37:19,306 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-12-02 12:37:19,306 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-12-02 12:37:19,306 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-12-02 12:37:19,306 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-12-02 12:37:19,307 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-12-02 12:37:19,307 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-12-02 12:37:19,307 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-12-02 12:37:19,307 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-12-02 12:37:19,307 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-12-02 12:37:19,307 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-12-02 12:37:19,307 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-12-02 12:37:19,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 12:37:19,308 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-12-02 12:37:19,308 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-12-02 12:37:19,308 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-12-02 12:37:19,308 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-12-02 12:37:19,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:37:19,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:37:19,308 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-12-02 12:37:19,308 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-12-02 12:37:19,438 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:37:19,441 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:37:20,168 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:37:20,716 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:37:20,717 INFO L309 CfgBuilder]: Removed 18 assume(true) statements. [2023-12-02 12:37:20,718 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:37:20 BoogieIcfgContainer [2023-12-02 12:37:20,719 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:37:20,721 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:37:20,721 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:37:20,724 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:37:20,724 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:37:18" (1/3) ... [2023-12-02 12:37:20,725 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d79b9c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:37:20, skipping insertion in model container [2023-12-02 12:37:20,725 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:19" (2/3) ... [2023-12-02 12:37:20,725 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d79b9c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:37:20, skipping insertion in model container [2023-12-02 12:37:20,726 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:37:20" (3/3) ... [2023-12-02 12:37:20,727 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.11.cil-2.c [2023-12-02 12:37:20,746 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:37:20,747 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 12:37:20,804 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:37:20,811 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;@7f2fe077, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:37:20,811 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 12:37:20,817 INFO L276 IsEmpty]: Start isEmpty. Operand has 261 states, 205 states have (on average 1.5073170731707317) internal successors, (309), 211 states have internal predecessors, (309), 39 states have call successors, (39), 14 states have call predecessors, (39), 14 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2023-12-02 12:37:20,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 12:37:20,828 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:37:20,828 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 12:37:20,829 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:37:20,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:37:20,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1152034169, now seen corresponding path program 1 times [2023-12-02 12:37:20,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:37:20,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310928561] [2023-12-02 12:37:20,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:37:20,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:37:20,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:37:21,170 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 12:37:21,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:37:21,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310928561] [2023-12-02 12:37:21,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310928561] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:37:21,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:37:21,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:37:21,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167635144] [2023-12-02 12:37:21,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:37:21,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:37:21,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:37:21,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:37:21,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:37:21,213 INFO L87 Difference]: Start difference. First operand has 261 states, 205 states have (on average 1.5073170731707317) internal successors, (309), 211 states have internal predecessors, (309), 39 states have call successors, (39), 14 states have call predecessors, (39), 14 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) 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 12:37:21,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:37:21,635 INFO L93 Difference]: Finished difference Result 573 states and 845 transitions. [2023-12-02 12:37:21,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:37:21,638 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 12:37:21,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:37:21,651 INFO L225 Difference]: With dead ends: 573 [2023-12-02 12:37:21,651 INFO L226 Difference]: Without dead ends: 316 [2023-12-02 12:37:21,656 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 12:37:21,660 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 435 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:37:21,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 644 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 12:37:21,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-12-02 12:37:21,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 309. [2023-12-02 12:37:21,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 240 states have (on average 1.425) internal successors, (342), 244 states have internal predecessors, (342), 47 states have call successors, (47), 21 states have call predecessors, (47), 20 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-12-02 12:37:21,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 434 transitions. [2023-12-02 12:37:21,732 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 434 transitions. Word has length 45 [2023-12-02 12:37:21,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:37:21,733 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 434 transitions. [2023-12-02 12:37:21,733 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 12:37:21,733 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 434 transitions. [2023-12-02 12:37:21,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 12:37:21,736 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:37:21,736 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 12:37:21,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 12:37:21,737 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:37:21,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:37:21,737 INFO L85 PathProgramCache]: Analyzing trace with hash 2071008792, now seen corresponding path program 1 times [2023-12-02 12:37:21,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:37:21,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069889123] [2023-12-02 12:37:21,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:37:21,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:37:21,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:37:21,856 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 12:37:21,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:37:21,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069889123] [2023-12-02 12:37:21,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069889123] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:37:21,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:37:21,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 12:37:21,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743807200] [2023-12-02 12:37:21,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:37:21,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:37:21,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:37:21,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:37:21,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:37:21,861 INFO L87 Difference]: Start difference. First operand 309 states and 434 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 12:37:22,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:37:22,637 INFO L93 Difference]: Finished difference Result 711 states and 937 transitions. [2023-12-02 12:37:22,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:37:22,637 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2023-12-02 12:37:22,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:37:22,644 INFO L225 Difference]: With dead ends: 711 [2023-12-02 12:37:22,644 INFO L226 Difference]: Without dead ends: 579 [2023-12-02 12:37:22,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-12-02 12:37:22,647 INFO L413 NwaCegarLoop]: 426 mSDtfsCounter, 900 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 12:37:22,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [904 Valid, 1092 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 12:37:22,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2023-12-02 12:37:22,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 495. [2023-12-02 12:37:22,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 372 states have (on average 1.3494623655913978) internal successors, (502), 377 states have internal predecessors, (502), 74 states have call successors, (74), 44 states have call predecessors, (74), 47 states have return successors, (76), 75 states have call predecessors, (76), 72 states have call successors, (76) [2023-12-02 12:37:22,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 652 transitions. [2023-12-02 12:37:22,701 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 652 transitions. Word has length 45 [2023-12-02 12:37:22,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:37:22,701 INFO L495 AbstractCegarLoop]: Abstraction has 495 states and 652 transitions. [2023-12-02 12:37:22,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 12:37:22,702 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 652 transitions. [2023-12-02 12:37:22,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 12:37:22,704 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:37:22,704 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 12:37:22,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 12:37:22,705 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:37:22,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:37:22,705 INFO L85 PathProgramCache]: Analyzing trace with hash 875661378, now seen corresponding path program 1 times [2023-12-02 12:37:22,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:37:22,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970419854] [2023-12-02 12:37:22,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:37:22,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:37:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:37:22,907 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 12:37:22,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:37:22,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970419854] [2023-12-02 12:37:22,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970419854] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:37:22,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:37:22,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 12:37:22,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132725570] [2023-12-02 12:37:22,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:37:22,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 12:37:22,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:37:22,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 12:37:22,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:37:22,910 INFO L87 Difference]: Start difference. First operand 495 states and 652 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 12:37:23,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:37:23,785 INFO L93 Difference]: Finished difference Result 1011 states and 1268 transitions. [2023-12-02 12:37:23,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 12:37:23,786 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2023-12-02 12:37:23,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:37:23,791 INFO L225 Difference]: With dead ends: 1011 [2023-12-02 12:37:23,791 INFO L226 Difference]: Without dead ends: 709 [2023-12-02 12:37:23,793 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 12:37:23,794 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 523 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 12:37:23,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 1127 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 12:37:23,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2023-12-02 12:37:23,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 674. [2023-12-02 12:37:23,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 497 states have (on average 1.3158953722334004) internal successors, (654), 503 states have internal predecessors, (654), 101 states have call successors, (101), 67 states have call predecessors, (101), 74 states have return successors, (107), 105 states have call predecessors, (107), 99 states have call successors, (107) [2023-12-02 12:37:23,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 862 transitions. [2023-12-02 12:37:23,838 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 862 transitions. Word has length 46 [2023-12-02 12:37:23,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:37:23,839 INFO L495 AbstractCegarLoop]: Abstraction has 674 states and 862 transitions. [2023-12-02 12:37:23,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 12:37:23,839 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 862 transitions. [2023-12-02 12:37:23,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 12:37:23,841 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:37:23,841 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 12:37:23,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 12:37:23,841 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:37:23,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:37:23,842 INFO L85 PathProgramCache]: Analyzing trace with hash 2058292889, now seen corresponding path program 1 times [2023-12-02 12:37:23,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:37:23,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178829981] [2023-12-02 12:37:23,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:37:23,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:37:23,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:37:23,886 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 12:37:23,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:37:23,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178829981] [2023-12-02 12:37:23,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178829981] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:37:23,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:37:23,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:37:23,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564441052] [2023-12-02 12:37:23,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:37:23,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:37:23,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:37:23,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:37:23,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:37:23,889 INFO L87 Difference]: Start difference. First operand 674 states and 862 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 12:37:24,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:37:24,051 INFO L93 Difference]: Finished difference Result 1238 states and 1532 transitions. [2023-12-02 12:37:24,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:37:24,051 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 12:37:24,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:37:24,057 INFO L225 Difference]: With dead ends: 1238 [2023-12-02 12:37:24,057 INFO L226 Difference]: Without dead ends: 806 [2023-12-02 12:37:24,059 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 12:37:24,060 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 67 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:37:24,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 607 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:37:24,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2023-12-02 12:37:24,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 701. [2023-12-02 12:37:24,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 520 states have (on average 1.3057692307692308) internal successors, (679), 526 states have internal predecessors, (679), 103 states have call successors, (103), 69 states have call predecessors, (103), 76 states have return successors, (109), 107 states have call predecessors, (109), 101 states have call successors, (109) [2023-12-02 12:37:24,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 891 transitions. [2023-12-02 12:37:24,103 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 891 transitions. Word has length 47 [2023-12-02 12:37:24,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:37:24,104 INFO L495 AbstractCegarLoop]: Abstraction has 701 states and 891 transitions. [2023-12-02 12:37:24,104 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 12:37:24,104 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 891 transitions. [2023-12-02 12:37:24,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-02 12:37:24,106 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:37:24,106 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] [2023-12-02 12:37:24,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 12:37:24,107 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:37:24,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:37:24,107 INFO L85 PathProgramCache]: Analyzing trace with hash 229969147, now seen corresponding path program 1 times [2023-12-02 12:37:24,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:37:24,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098893685] [2023-12-02 12:37:24,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:37:24,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:37:24,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:37:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:37:24,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:37:24,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098893685] [2023-12-02 12:37:24,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098893685] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:37:24,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:37:24,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:37:24,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997904982] [2023-12-02 12:37:24,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:37:24,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:37:24,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:37:24,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:37:24,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:37:24,177 INFO L87 Difference]: Start difference. First operand 701 states and 891 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 12:37:24,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:37:24,327 INFO L93 Difference]: Finished difference Result 891 states and 1112 transitions. [2023-12-02 12:37:24,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:37:24,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 53 [2023-12-02 12:37:24,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:37:24,332 INFO L225 Difference]: With dead ends: 891 [2023-12-02 12:37:24,333 INFO L226 Difference]: Without dead ends: 618 [2023-12-02 12:37:24,334 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 12:37:24,335 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 340 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:37:24,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 382 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:37:24,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2023-12-02 12:37:24,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 509. [2023-12-02 12:37:24,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 380 states have (on average 1.3078947368421052) internal successors, (497), 384 states have internal predecessors, (497), 79 states have call successors, (79), 49 states have call predecessors, (79), 48 states have return successors, (77), 77 states have call predecessors, (77), 77 states have call successors, (77) [2023-12-02 12:37:24,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 653 transitions. [2023-12-02 12:37:24,377 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 653 transitions. Word has length 53 [2023-12-02 12:37:24,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:37:24,378 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 653 transitions. [2023-12-02 12:37:24,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 12:37:24,378 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 653 transitions. [2023-12-02 12:37:24,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-02 12:37:24,380 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:37:24,380 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 12:37:24,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 12:37:24,380 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:37:24,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:37:24,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1000777248, now seen corresponding path program 1 times [2023-12-02 12:37:24,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:37:24,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189836909] [2023-12-02 12:37:24,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:37:24,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:37:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:37:24,467 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 12:37:24,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:37:24,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189836909] [2023-12-02 12:37:24,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189836909] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:37:24,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:37:24,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:37:24,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473836902] [2023-12-02 12:37:24,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:37:24,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:37:24,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:37:24,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:37:24,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:37:24,470 INFO L87 Difference]: Start difference. First operand 509 states and 653 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 12:37:24,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:37:24,813 INFO L93 Difference]: Finished difference Result 612 states and 769 transitions. [2023-12-02 12:37:24,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:37:24,814 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 12:37:24,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:37:24,819 INFO L225 Difference]: With dead ends: 612 [2023-12-02 12:37:24,819 INFO L226 Difference]: Without dead ends: 609 [2023-12-02 12:37:24,819 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 12:37:24,820 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 621 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:37:24,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [621 Valid, 353 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 12:37:24,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2023-12-02 12:37:24,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 508. [2023-12-02 12:37:24,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 380 states have (on average 1.3) internal successors, (494), 383 states have internal predecessors, (494), 78 states have call successors, (78), 49 states have call predecessors, (78), 48 states have return successors, (77), 77 states have call predecessors, (77), 77 states have call successors, (77) [2023-12-02 12:37:24,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 649 transitions. [2023-12-02 12:37:24,879 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 649 transitions. Word has length 54 [2023-12-02 12:37:24,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:37:24,880 INFO L495 AbstractCegarLoop]: Abstraction has 508 states and 649 transitions. [2023-12-02 12:37:24,880 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 12:37:24,880 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 649 transitions. [2023-12-02 12:37:24,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 12:37:24,882 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:37:24,882 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 12:37:24,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 12:37:24,882 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:37:24,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:37:24,883 INFO L85 PathProgramCache]: Analyzing trace with hash -960695550, now seen corresponding path program 1 times [2023-12-02 12:37:24,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:37:24,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436705361] [2023-12-02 12:37:24,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:37:24,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:37:24,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:37:25,000 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 12:37:25,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:37:25,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436705361] [2023-12-02 12:37:25,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436705361] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:37:25,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736940255] [2023-12-02 12:37:25,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:37:25,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:37:25,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:37:25,004 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:37:25,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 12:37:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:37:25,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 12:37:25,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:37:25,363 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 12:37:25,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:37:25,451 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 12:37:25,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736940255] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:37:25,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1071702012] [2023-12-02 12:37:25,471 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-12-02 12:37:25,472 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:37:25,475 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:37:25,481 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:37:25,481 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:37:32,056 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 201 for LOIs [2023-12-02 12:37:32,151 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 197 for LOIs [2023-12-02 12:37:32,241 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 205 for LOIs [2023-12-02 12:37:33,562 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 201 for LOIs [2023-12-02 12:37:33,829 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 201 for LOIs [2023-12-02 12:37:34,105 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 201 for LOIs [2023-12-02 12:37:34,197 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 208 for LOIs [2023-12-02 12:37:34,294 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:37:57,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1071702012] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:37:57,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:37:57,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [5, 5, 4] total 41 [2023-12-02 12:37:57,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323483038] [2023-12-02 12:37:57,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:37:57,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-02 12:37:57,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:37:57,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-02 12:37:57,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 12:37:57,662 INFO L87 Difference]: Start difference. First operand 508 states and 649 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 12:38:28,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:28,875 INFO L93 Difference]: Finished difference Result 872 states and 1060 transitions. [2023-12-02 12:38:28,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-02 12:38:28,876 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 12:38:28,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:28,879 INFO L225 Difference]: With dead ends: 872 [2023-12-02 12:38:28,879 INFO L226 Difference]: Without dead ends: 557 [2023-12-02 12:38:28,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 44.3s TimeCoverageRelationStatistics Valid=601, Invalid=4091, Unknown=0, NotChecked=0, Total=4692 [2023-12-02 12:38:28,882 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 185 mSDsluCounter, 2104 mSDsCounter, 0 mSdLazyCounter, 5234 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 2388 SdHoareTripleChecker+Invalid, 5378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 5234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:28,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 2388 Invalid, 5378 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [144 Valid, 5234 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2023-12-02 12:38:28,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2023-12-02 12:38:28,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 542. [2023-12-02 12:38:28,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 406 states have (on average 1.2857142857142858) internal successors, (522), 409 states have internal predecessors, (522), 80 states have call successors, (80), 55 states have call predecessors, (80), 54 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2023-12-02 12:38:28,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 681 transitions. [2023-12-02 12:38:28,987 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 681 transitions. Word has length 55 [2023-12-02 12:38:28,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:28,987 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 681 transitions. [2023-12-02 12:38:28,988 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 12:38:28,988 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 681 transitions. [2023-12-02 12:38:28,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-02 12:38:28,989 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:28,989 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 12:38:28,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 12:38:29,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 12:38:29,190 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:38:29,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:29,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1643928021, now seen corresponding path program 1 times [2023-12-02 12:38:29,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:38:29,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546335898] [2023-12-02 12:38:29,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:29,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:38:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:29,251 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 12:38:29,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:38:29,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546335898] [2023-12-02 12:38:29,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546335898] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:38:29,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:38:29,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:38:29,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876923131] [2023-12-02 12:38:29,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:38:29,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:38:29,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:38:29,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:38:29,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:38:29,254 INFO L87 Difference]: Start difference. First operand 542 states and 681 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 12:38:29,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:29,476 INFO L93 Difference]: Finished difference Result 823 states and 1003 transitions. [2023-12-02 12:38:29,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:38:29,476 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 12:38:29,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:29,480 INFO L225 Difference]: With dead ends: 823 [2023-12-02 12:38:29,481 INFO L226 Difference]: Without dead ends: 654 [2023-12-02 12:38:29,481 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 12:38:29,482 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 42 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:29,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 653 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:38:29,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2023-12-02 12:38:29,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 577. [2023-12-02 12:38:29,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 435 states have (on average 1.282758620689655) internal successors, (558), 438 states have internal predecessors, (558), 83 states have call successors, (83), 58 states have call predecessors, (83), 57 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2023-12-02 12:38:29,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 723 transitions. [2023-12-02 12:38:29,577 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 723 transitions. Word has length 61 [2023-12-02 12:38:29,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:29,577 INFO L495 AbstractCegarLoop]: Abstraction has 577 states and 723 transitions. [2023-12-02 12:38:29,577 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 12:38:29,577 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 723 transitions. [2023-12-02 12:38:29,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-02 12:38:29,578 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:29,578 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 12:38:29,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 12:38:29,578 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:38:29,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:29,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1959436739, now seen corresponding path program 1 times [2023-12-02 12:38:29,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:38:29,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722946228] [2023-12-02 12:38:29,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:29,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:38:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:29,711 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 12:38:29,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:38:29,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722946228] [2023-12-02 12:38:29,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722946228] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:38:29,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:38:29,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 12:38:29,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971739833] [2023-12-02 12:38:29,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:38:29,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 12:38:29,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:38:29,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 12:38:29,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:38:29,714 INFO L87 Difference]: Start difference. First operand 577 states and 723 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 12:38:30,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:30,525 INFO L93 Difference]: Finished difference Result 1040 states and 1249 transitions. [2023-12-02 12:38:30,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 12:38:30,526 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 12:38:30,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:30,529 INFO L225 Difference]: With dead ends: 1040 [2023-12-02 12:38:30,529 INFO L226 Difference]: Without dead ends: 737 [2023-12-02 12:38:30,531 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 12:38:30,531 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 507 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:30,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 926 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 12:38:30,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2023-12-02 12:38:30,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 716. [2023-12-02 12:38:30,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 529 states have (on average 1.2495274102079394) internal successors, (661), 532 states have internal predecessors, (661), 107 states have call successors, (107), 79 states have call predecessors, (107), 78 states have return successors, (106), 106 states have call predecessors, (106), 106 states have call successors, (106) [2023-12-02 12:38:30,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 874 transitions. [2023-12-02 12:38:30,621 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 874 transitions. Word has length 63 [2023-12-02 12:38:30,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:30,621 INFO L495 AbstractCegarLoop]: Abstraction has 716 states and 874 transitions. [2023-12-02 12:38:30,621 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 12:38:30,621 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 874 transitions. [2023-12-02 12:38:30,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-02 12:38:30,623 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:30,623 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 12:38:30,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 12:38:30,623 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:38:30,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:30,623 INFO L85 PathProgramCache]: Analyzing trace with hash 202206313, now seen corresponding path program 1 times [2023-12-02 12:38:30,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:38:30,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661348167] [2023-12-02 12:38:30,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:30,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:38:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:30,732 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 12:38:30,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:38:30,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661348167] [2023-12-02 12:38:30,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661348167] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:38:30,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627925130] [2023-12-02 12:38:30,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:30,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:38:30,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:38:30,734 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:38:30,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 12:38:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:30,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 12:38:30,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:31,033 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 12:38:31,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:38:31,100 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 12:38:31,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627925130] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:38:31,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1753177292] [2023-12-02 12:38:31,104 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-12-02 12:38:31,104 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:38:31,104 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:38:31,105 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:38:31,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:38:49,006 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 201 for LOIs [2023-12-02 12:38:49,095 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 200 for LOIs [2023-12-02 12:38:49,683 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 168 for LOIs [2023-12-02 12:38:50,200 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 205 for LOIs [2023-12-02 12:38:51,573 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 201 for LOIs [2023-12-02 12:38:51,841 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 201 for LOIs [2023-12-02 12:38:52,120 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 201 for LOIs [2023-12-02 12:38:52,209 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 208 for LOIs [2023-12-02 12:38:52,303 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:39:22,218 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18031#(and (= ~q_req_up~0 1) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_5| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_5| 0)) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_5| 2147483648)) (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_5| 2147483647))) (= ~q_free~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (exists ((|v_ULTIMATE.start_start_simulation1_~kernel_st~0#1_BEFORE_CALL_30| Int) (v_~c_last_read~0_10 Int) (v_~q_free~0_42 Int) (|v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_1| Int)) (and (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (not (= ~p_dw_st~0 0)) (<= 1 |#StackHeapBarrier|) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= v_~c_last_read~0_10 0) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_1|) (= |v_ULTIMATE.start_start_simulation1_~kernel_st~0#1_BEFORE_CALL_30| 1) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (= ~t11_pc~0 0) (= ~t11_i~0 0) (= ~E_2~0 2) (not (= v_~q_free~0_42 1)) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_1| 0)) (= ~token~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_1| 1) (= 0 ~t4_pc~0) (= ~t11_st~0 0) (<= v_~q_free~0_42 1) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (= ~E_9~0 2) (= ~t1_i~0 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 12:39:22,219 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:39:22,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:39:22,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-12-02 12:39:22,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017402315] [2023-12-02 12:39:22,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:39:22,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 12:39:22,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:39:22,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 12:39:22,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1915, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 12:39:22,221 INFO L87 Difference]: Start difference. First operand 716 states and 874 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 12:39:22,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:39:22,802 INFO L93 Difference]: Finished difference Result 1810 states and 2115 transitions. [2023-12-02 12:39:22,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:39:22,803 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 12:39:22,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:39:22,813 INFO L225 Difference]: With dead ends: 1810 [2023-12-02 12:39:22,813 INFO L226 Difference]: Without dead ends: 1807 [2023-12-02 12:39:22,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 148 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=247, Invalid=1915, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 12:39:22,816 INFO L413 NwaCegarLoop]: 402 mSDtfsCounter, 563 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:39:22,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 1092 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 12:39:22,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2023-12-02 12:39:22,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1230. [2023-12-02 12:39:22,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 885 states have (on average 1.2203389830508475) internal successors, (1080), 888 states have internal predecessors, (1080), 191 states have call successors, (191), 153 states have call predecessors, (191), 152 states have return successors, (190), 190 states have call predecessors, (190), 190 states have call successors, (190) [2023-12-02 12:39:22,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 1461 transitions. [2023-12-02 12:39:22,985 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 1461 transitions. Word has length 64 [2023-12-02 12:39:22,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:39:22,986 INFO L495 AbstractCegarLoop]: Abstraction has 1230 states and 1461 transitions. [2023-12-02 12:39:22,986 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 12:39:22,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 1461 transitions. [2023-12-02 12:39:22,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-02 12:39:22,988 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:39:22,988 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 12:39:22,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-02 12:39:23,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 12:39:23,194 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:39:23,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:39:23,195 INFO L85 PathProgramCache]: Analyzing trace with hash 824757323, now seen corresponding path program 2 times [2023-12-02 12:39:23,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:39:23,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088298963] [2023-12-02 12:39:23,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:23,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:39:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:23,236 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 12:39:23,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:39:23,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088298963] [2023-12-02 12:39:23,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088298963] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:39:23,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:39:23,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:39:23,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114266477] [2023-12-02 12:39:23,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:39:23,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:39:23,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:39:23,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:39:23,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:39:23,238 INFO L87 Difference]: Start difference. First operand 1230 states and 1461 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 12:39:23,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:39:23,519 INFO L93 Difference]: Finished difference Result 1982 states and 2317 transitions. [2023-12-02 12:39:23,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:39:23,520 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 12:39:23,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:39:23,527 INFO L225 Difference]: With dead ends: 1982 [2023-12-02 12:39:23,527 INFO L226 Difference]: Without dead ends: 1226 [2023-12-02 12:39:23,530 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 12:39:23,530 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 343 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:39:23,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 418 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:39:23,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2023-12-02 12:39:23,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 1215. [2023-12-02 12:39:23,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 870 states have (on average 1.206896551724138) internal successors, (1050), 873 states have internal predecessors, (1050), 191 states have call successors, (191), 153 states have call predecessors, (191), 152 states have return successors, (190), 190 states have call predecessors, (190), 190 states have call successors, (190) [2023-12-02 12:39:23,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 1431 transitions. [2023-12-02 12:39:23,724 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 1431 transitions. Word has length 67 [2023-12-02 12:39:23,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:39:23,725 INFO L495 AbstractCegarLoop]: Abstraction has 1215 states and 1431 transitions. [2023-12-02 12:39:23,725 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 12:39:23,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 1431 transitions. [2023-12-02 12:39:23,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-02 12:39:23,727 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:39:23,727 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:39:23,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 12:39:23,727 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:39:23,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:39:23,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1614794937, now seen corresponding path program 1 times [2023-12-02 12:39:23,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:39:23,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579617976] [2023-12-02 12:39:23,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:23,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:39:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:23,840 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 12:39:23,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:39:23,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579617976] [2023-12-02 12:39:23,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579617976] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:39:23,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:39:23,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:39:23,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141945208] [2023-12-02 12:39:23,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:39:23,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:39:23,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:39:23,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:39:23,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:39:23,842 INFO L87 Difference]: Start difference. First operand 1215 states and 1431 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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 12:39:24,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:39:24,805 INFO L93 Difference]: Finished difference Result 2098 states and 2853 transitions. [2023-12-02 12:39:24,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:39:24,805 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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 64 [2023-12-02 12:39:24,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:39:24,817 INFO L225 Difference]: With dead ends: 2098 [2023-12-02 12:39:24,817 INFO L226 Difference]: Without dead ends: 1916 [2023-12-02 12:39:24,820 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 12:39:24,820 INFO L413 NwaCegarLoop]: 513 mSDtfsCounter, 1415 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1415 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 12:39:24,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1415 Valid, 1329 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 12:39:24,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2023-12-02 12:39:25,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1905. [2023-12-02 12:39:25,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 1455 states have (on average 1.3168384879725086) internal successors, (1916), 1461 states have internal predecessors, (1916), 272 states have call successors, (272), 177 states have call predecessors, (272), 176 states have return successors, (329), 268 states have call predecessors, (329), 271 states have call successors, (329) [2023-12-02 12:39:25,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 2517 transitions. [2023-12-02 12:39:25,117 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 2517 transitions. Word has length 64 [2023-12-02 12:39:25,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:39:25,117 INFO L495 AbstractCegarLoop]: Abstraction has 1905 states and 2517 transitions. [2023-12-02 12:39:25,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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 12:39:25,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 2517 transitions. [2023-12-02 12:39:25,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-02 12:39:25,119 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:39:25,119 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 12:39:25,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 12:39:25,120 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:39:25,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:39:25,120 INFO L85 PathProgramCache]: Analyzing trace with hash 395639425, now seen corresponding path program 1 times [2023-12-02 12:39:25,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:39:25,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857400283] [2023-12-02 12:39:25,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:25,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:39:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:25,176 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 12:39:25,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:39:25,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857400283] [2023-12-02 12:39:25,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857400283] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:39:25,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:39:25,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:39:25,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122146798] [2023-12-02 12:39:25,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:39:25,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:39:25,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:39:25,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:39:25,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:39:25,178 INFO L87 Difference]: Start difference. First operand 1905 states and 2517 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 12:39:25,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:39:25,544 INFO L93 Difference]: Finished difference Result 2871 states and 3611 transitions. [2023-12-02 12:39:25,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:39:25,545 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 12:39:25,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:39:25,557 INFO L225 Difference]: With dead ends: 2871 [2023-12-02 12:39:25,557 INFO L226 Difference]: Without dead ends: 2081 [2023-12-02 12:39:25,569 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 12:39:25,570 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 37 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:39:25,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 644 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:39:25,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2081 states. [2023-12-02 12:39:25,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2081 to 1952. [2023-12-02 12:39:25,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1952 states, 1494 states have (on average 1.3132530120481927) internal successors, (1962), 1500 states have internal predecessors, (1962), 276 states have call successors, (276), 181 states have call predecessors, (276), 180 states have return successors, (333), 272 states have call predecessors, (333), 275 states have call successors, (333) [2023-12-02 12:39:25,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 2571 transitions. [2023-12-02 12:39:25,875 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 2571 transitions. Word has length 71 [2023-12-02 12:39:25,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:39:25,875 INFO L495 AbstractCegarLoop]: Abstraction has 1952 states and 2571 transitions. [2023-12-02 12:39:25,875 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 12:39:25,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 2571 transitions. [2023-12-02 12:39:25,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-02 12:39:25,878 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:39:25,878 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 12:39:25,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 12:39:25,879 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:39:25,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:39:25,879 INFO L85 PathProgramCache]: Analyzing trace with hash 443676719, now seen corresponding path program 1 times [2023-12-02 12:39:25,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:39:25,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122182648] [2023-12-02 12:39:25,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:25,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:39:25,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:26,222 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 12:39:26,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:39:26,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122182648] [2023-12-02 12:39:26,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122182648] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:39:26,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660274909] [2023-12-02 12:39:26,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:26,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:39:26,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:39:26,224 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:39:26,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 12:39:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:26,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 12:39:26,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:39:26,423 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 12:39:26,424 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:39:26,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660274909] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:39:26,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:39:26,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2023-12-02 12:39:26,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042684269] [2023-12-02 12:39:26,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:39:26,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:39:26,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:39:26,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:39:26,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-12-02 12:39:26,426 INFO L87 Difference]: Start difference. First operand 1952 states and 2571 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 12:39:26,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:39:26,900 INFO L93 Difference]: Finished difference Result 2814 states and 3575 transitions. [2023-12-02 12:39:26,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:39:26,901 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 12:39:26,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:39:26,912 INFO L225 Difference]: With dead ends: 2814 [2023-12-02 12:39:26,912 INFO L226 Difference]: Without dead ends: 1767 [2023-12-02 12:39:26,915 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 12:39:26,916 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 337 mSDsluCounter, 1052 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 1406 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:39:26,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 1406 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:39:26,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2023-12-02 12:39:27,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1582. [2023-12-02 12:39:27,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1256 states have (on average 1.3463375796178343) internal successors, (1691), 1262 states have internal predecessors, (1691), 205 states have call successors, (205), 120 states have call predecessors, (205), 119 states have return successors, (262), 201 states have call predecessors, (262), 204 states have call successors, (262) [2023-12-02 12:39:27,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 2158 transitions. [2023-12-02 12:39:27,187 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 2158 transitions. Word has length 102 [2023-12-02 12:39:27,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:39:27,188 INFO L495 AbstractCegarLoop]: Abstraction has 1582 states and 2158 transitions. [2023-12-02 12:39:27,188 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 12:39:27,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 2158 transitions. [2023-12-02 12:39:27,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-02 12:39:27,191 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:39:27,191 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 12:39:27,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 12:39:27,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 12:39:27,397 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:39:27,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:39:27,397 INFO L85 PathProgramCache]: Analyzing trace with hash -603329385, now seen corresponding path program 1 times [2023-12-02 12:39:27,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:39:27,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789258431] [2023-12-02 12:39:27,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:27,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:39:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:27,589 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 12:39:27,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:39:27,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789258431] [2023-12-02 12:39:27,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789258431] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:39:27,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136602228] [2023-12-02 12:39:27,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:27,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:39:27,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:39:27,591 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:39:27,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 12:39:27,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:27,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 12:39:27,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:39:27,825 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 12:39:27,825 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:39:27,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136602228] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:39:27,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:39:27,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-12-02 12:39:27,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977178480] [2023-12-02 12:39:27,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:39:27,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 12:39:27,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:39:27,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 12:39:27,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-12-02 12:39:27,828 INFO L87 Difference]: Start difference. First operand 1582 states and 2158 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 12:39:28,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:39:28,269 INFO L93 Difference]: Finished difference Result 2131 states and 2783 transitions. [2023-12-02 12:39:28,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:39:28,285 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 12:39:28,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:39:28,291 INFO L225 Difference]: With dead ends: 2131 [2023-12-02 12:39:28,292 INFO L226 Difference]: Without dead ends: 1538 [2023-12-02 12:39:28,293 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 12:39:28,294 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 62 mSDsluCounter, 1318 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1670 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:39:28,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1670 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:39:28,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2023-12-02 12:39:28,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1446. [2023-12-02 12:39:28,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1156 states have (on average 1.3615916955017302) internal successors, (1574), 1162 states have internal predecessors, (1574), 186 states have call successors, (186), 103 states have call predecessors, (186), 102 states have return successors, (243), 182 states have call predecessors, (243), 185 states have call successors, (243) [2023-12-02 12:39:28,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 2003 transitions. [2023-12-02 12:39:28,440 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 2003 transitions. Word has length 112 [2023-12-02 12:39:28,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:39:28,440 INFO L495 AbstractCegarLoop]: Abstraction has 1446 states and 2003 transitions. [2023-12-02 12:39:28,440 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 12:39:28,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 2003 transitions. [2023-12-02 12:39:28,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 12:39:28,442 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:39:28,443 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 12:39:28,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 12:39:28,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 12:39:28,644 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:39:28,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:39:28,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1837454866, now seen corresponding path program 1 times [2023-12-02 12:39:28,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:39:28,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514555979] [2023-12-02 12:39:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:28,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:39:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:28,802 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 12:39:28,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:39:28,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514555979] [2023-12-02 12:39:28,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514555979] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:39:28,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187109213] [2023-12-02 12:39:28,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:28,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:39:28,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:39:28,804 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:39:28,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 12:39:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:28,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 12:39:28,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:39:29,020 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 12:39:29,020 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:39:29,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187109213] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:39:29,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:39:29,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2023-12-02 12:39:29,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89168166] [2023-12-02 12:39:29,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:39:29,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:39:29,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:39:29,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:39:29,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 12:39:29,022 INFO L87 Difference]: Start difference. First operand 1446 states and 2003 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 12:39:29,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:39:29,395 INFO L93 Difference]: Finished difference Result 2195 states and 2848 transitions. [2023-12-02 12:39:29,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:39:29,396 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 12:39:29,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:39:29,403 INFO L225 Difference]: With dead ends: 2195 [2023-12-02 12:39:29,403 INFO L226 Difference]: Without dead ends: 1738 [2023-12-02 12:39:29,405 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 12:39:29,405 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 323 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1436 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:39:29,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 1436 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:39:29,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2023-12-02 12:39:29,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1704. [2023-12-02 12:39:29,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1704 states, 1318 states have (on average 1.330804248861912) internal successors, (1754), 1330 states have internal predecessors, (1754), 234 states have call successors, (234), 145 states have call predecessors, (234), 150 states have return successors, (303), 230 states have call predecessors, (303), 233 states have call successors, (303) [2023-12-02 12:39:29,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2291 transitions. [2023-12-02 12:39:29,575 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2291 transitions. Word has length 113 [2023-12-02 12:39:29,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:39:29,576 INFO L495 AbstractCegarLoop]: Abstraction has 1704 states and 2291 transitions. [2023-12-02 12:39:29,576 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 12:39:29,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2291 transitions. [2023-12-02 12:39:29,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-02 12:39:29,578 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:39:29,578 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 12:39:29,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-02 12:39:29,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:39:29,779 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:39:29,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:39:29,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1526177609, now seen corresponding path program 1 times [2023-12-02 12:39:29,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:39:29,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298641470] [2023-12-02 12:39:29,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:29,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:39:29,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 12:39:30,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:39:30,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298641470] [2023-12-02 12:39:30,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298641470] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:39:30,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669503510] [2023-12-02 12:39:30,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:30,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:39:30,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:39:30,728 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:39:30,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 12:39:30,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:30,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 59 conjunts are in the unsatisfiable core [2023-12-02 12:39:30,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:39:31,608 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 12:39:31,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:39:33,193 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 12:39:33,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669503510] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:39:33,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1204560911] [2023-12-02 12:39:33,196 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2023-12-02 12:39:33,196 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:39:33,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:39:33,197 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:39:33,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:40:33,424 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 161 for LOIs [2023-12-02 12:40:33,478 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 226 for LOIs [2023-12-02 12:40:33,646 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 161 for LOIs [2023-12-02 12:40:33,713 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 229 for LOIs [2023-12-02 12:40:37,931 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 230 for LOIs [2023-12-02 12:40:42,183 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 170 for LOIs [2023-12-02 12:40:43,185 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 223 for LOIs [2023-12-02 12:40:43,729 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 234 for LOIs [2023-12-02 12:40:44,345 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:41:48,973 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '55172#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (<= 1 |#StackHeapBarrier|) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~T11_E~0 2) (exists ((|v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_14| Int) (|v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_14| Int) (|v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_19| Int) (|v_ULTIMATE.start_do_read_c_~a~0#1_BEFORE_CALL_2| Int)) (and (or (and (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_14| 1) (= |v_ULTIMATE.start_do_read_c_~a~0#1_BEFORE_CALL_2| ~q_buf_0~0) (= ~c_num_read~0 1) (= |v_ULTIMATE.start_do_read_c_~a~0#1_BEFORE_CALL_2| ~c_last_read~0) (exists ((v_~q_free~0_57 Int)) (and (= ~p_dw_pc~0 0) (= ~q_buf_0~0 0) (= v_~q_free~0_57 1) (= ~c_dr_pc~0 1) (= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_14| 0) (= ~p_dw_st~0 0)))) (and (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_14| 0)) (<= 0 (+ ~a_t~0 2147483648)) (= 2 ~c_num_read~0) (= |v_ULTIMATE.start_do_read_c_~a~0#1_BEFORE_CALL_2| ~q_buf_0~0) (= ~c_dr_pc~0 1) (= |v_ULTIMATE.start_do_read_c_~a~0#1_BEFORE_CALL_2| ~c_last_read~0) (= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_14| 0) (= ~p_dw_pc~0 1) (= ~p_dw_st~0 0) (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_14|) (= ~p_num_write~0 1) (<= ~a_t~0 2147483647) (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_19| 0)))) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_19| 2147483648)) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_14| 1) (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_19| 2147483647))) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (<= ~c_last_read~0 2147483647) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~T7_E~0 2) (<= ~p_num_write~0 1) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~t11_pc~0 0) (<= 0 (+ ~q_buf_0~0 2147483648)) (= ~t11_i~0 0) (= ~E_2~0 2) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~t11_st~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (= ~E_9~0 2) (= ~c_dr_st~0 1) (= ~t1_i~0 0))' at error location [2023-12-02 12:41:48,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:41:48,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:41:48,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 17, 16] total 55 [2023-12-02 12:41:48,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414848266] [2023-12-02 12:41:48,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:41:48,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-12-02 12:41:48,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:48,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-12-02 12:41:48,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=836, Invalid=11374, Unknown=0, NotChecked=0, Total=12210 [2023-12-02 12:41:48,979 INFO L87 Difference]: Start difference. First operand 1704 states and 2291 transitions. Second operand has 55 states, 35 states have (on average 5.6) internal successors, (196), 39 states have internal predecessors, (196), 20 states have call successors, (44), 16 states have call predecessors, (44), 23 states have return successors, (46), 20 states have call predecessors, (46), 20 states have call successors, (46) [2023-12-02 12:42:12,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:42:12,230 INFO L93 Difference]: Finished difference Result 4609 states and 5840 transitions. [2023-12-02 12:42:12,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 283 states. [2023-12-02 12:42:12,231 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 35 states have (on average 5.6) internal successors, (196), 39 states have internal predecessors, (196), 20 states have call successors, (44), 16 states have call predecessors, (44), 23 states have return successors, (46), 20 states have call predecessors, (46), 20 states have call successors, (46) Word has length 114 [2023-12-02 12:42:12,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:42:12,247 INFO L225 Difference]: With dead ends: 4609 [2023-12-02 12:42:12,247 INFO L226 Difference]: Without dead ends: 3894 [2023-12-02 12:42:12,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 681 GetRequests, 291 SyntacticMatches, 3 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 62327 ImplicationChecksByTransitivity, 82.8s TimeCoverageRelationStatistics Valid=13447, Invalid=137485, Unknown=0, NotChecked=0, Total=150932 [2023-12-02 12:42:12,266 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 5125 mSDsluCounter, 5275 mSDsCounter, 0 mSdLazyCounter, 8237 mSolverCounterSat, 2220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5126 SdHoareTripleChecker+Valid, 5567 SdHoareTripleChecker+Invalid, 10457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2220 IncrementalHoareTripleChecker+Valid, 8237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-12-02 12:42:12,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5126 Valid, 5567 Invalid, 10457 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2220 Valid, 8237 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-12-02 12:42:12,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3894 states. [2023-12-02 12:42:12,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3894 to 1980. [2023-12-02 12:42:12,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1502 states have (on average 1.3082556591211718) internal successors, (1965), 1516 states have internal predecessors, (1965), 279 states have call successors, (279), 182 states have call predecessors, (279), 197 states have return successors, (360), 283 states have call predecessors, (360), 278 states have call successors, (360) [2023-12-02 12:42:12,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 2604 transitions. [2023-12-02 12:42:12,662 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 2604 transitions. Word has length 114 [2023-12-02 12:42:12,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:42:12,662 INFO L495 AbstractCegarLoop]: Abstraction has 1980 states and 2604 transitions. [2023-12-02 12:42:12,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 35 states have (on average 5.6) internal successors, (196), 39 states have internal predecessors, (196), 20 states have call successors, (44), 16 states have call predecessors, (44), 23 states have return successors, (46), 20 states have call predecessors, (46), 20 states have call successors, (46) [2023-12-02 12:42:12,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 2604 transitions. [2023-12-02 12:42:12,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-12-02 12:42:12,665 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:42:12,665 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 12:42:12,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 12:42:12,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 12:42:12,866 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:42:12,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:42:12,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1825211579, now seen corresponding path program 1 times [2023-12-02 12:42:12,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:42:12,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614423890] [2023-12-02 12:42:12,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:12,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:42:12,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:13,224 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 12:42:13,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:42:13,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614423890] [2023-12-02 12:42:13,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614423890] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:42:13,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80330706] [2023-12-02 12:42:13,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:13,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:42:13,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:42:13,226 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:42:13,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 12:42:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:13,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 12:42:13,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:42:13,466 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 12:42:13,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:42:13,652 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 12:42:13,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80330706] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 12:42:13,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:42:13,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2023-12-02 12:42:13,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434424611] [2023-12-02 12:42:13,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:42:13,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 12:42:13,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:42:13,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 12:42:13,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2023-12-02 12:42:13,654 INFO L87 Difference]: Start difference. First operand 1980 states and 2604 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 12:42:14,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:42:14,640 INFO L93 Difference]: Finished difference Result 3304 states and 4152 transitions. [2023-12-02 12:42:14,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 12:42:14,640 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 12:42:14,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:42:14,653 INFO L225 Difference]: With dead ends: 3304 [2023-12-02 12:42:14,654 INFO L226 Difference]: Without dead ends: 2313 [2023-12-02 12:42:14,657 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 12:42:14,658 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 522 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:42:14,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 603 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 12:42:14,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2023-12-02 12:42:14,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2060. [2023-12-02 12:42:14,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 1547 states have (on average 1.3031674208144797) internal successors, (2016), 1564 states have internal predecessors, (2016), 298 states have call successors, (298), 191 states have call predecessors, (298), 213 states have return successors, (400), 306 states have call predecessors, (400), 297 states have call successors, (400) [2023-12-02 12:42:14,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 2714 transitions. [2023-12-02 12:42:14,997 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 2714 transitions. Word has length 115 [2023-12-02 12:42:14,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:42:14,997 INFO L495 AbstractCegarLoop]: Abstraction has 2060 states and 2714 transitions. [2023-12-02 12:42:14,997 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 12:42:14,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 2714 transitions. [2023-12-02 12:42:15,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-02 12:42:15,001 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:42:15,001 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 12:42:15,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 12:42:15,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 12:42:15,202 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:42:15,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:42:15,202 INFO L85 PathProgramCache]: Analyzing trace with hash -717561748, now seen corresponding path program 1 times [2023-12-02 12:42:15,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:42:15,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107106022] [2023-12-02 12:42:15,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:15,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:42:15,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:15,868 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 12:42:15,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:42:15,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107106022] [2023-12-02 12:42:15,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107106022] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:42:15,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036540964] [2023-12-02 12:42:15,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:15,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:42:15,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:42:15,869 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:42:15,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 12:42:16,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:16,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 62 conjunts are in the unsatisfiable core [2023-12-02 12:42:16,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:42:16,772 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 12:42:16,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:42:18,358 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 12:42:18,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036540964] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:42:18,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [450967199] [2023-12-02 12:42:18,361 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2023-12-02 12:42:18,361 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:42:18,362 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:42:18,362 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:42:18,362 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:42:43,629 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 7 for LOIs [2023-12-02 12:42:43,631 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 81 for LOIs [2023-12-02 12:42:43,676 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2023-12-02 12:42:43,679 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 215 for LOIs [2023-12-02 12:42:45,668 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 216 for LOIs [2023-12-02 12:42:47,406 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 16 for LOIs [2023-12-02 12:42:47,426 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 209 for LOIs [2023-12-02 12:42:47,730 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 220 for LOIs [2023-12-02 12:42:48,071 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:43:04,158 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '73102#(and (= ~q_req_up~0 1) (= ~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) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_24| Int)) (and (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_24| 2147483648)) (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_24| 2147483647) (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_24| 0)))) (= ~c_last_read~0 ~p_last_write~0) (exists ((v_~q_req_up~0_90 Int) (v_~q_free~0_81 Int) (|v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_19| Int) (|v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_19| Int)) (and (or (and (<= v_~q_free~0_81 1) (<= 0 ~p_dw_pc~0) (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_19|) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_19| 1) (= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_19| 0)) (and (= v_~q_free~0_81 0) (= ~p_dw_pc~0 1) (= 2 ~p_dw_st~0))) (or (exists ((v_~p_dw_st~0_118 Int) (v_~p_dw_pc~0_36 Int)) (and (or (and (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_19| 2147483648)) (<= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_19| 2147483647) (= v_~p_dw_pc~0_36 0) (= v_~p_dw_st~0_118 1) (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_19|) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_19| 1)) (and (<= ~q_buf_0~0 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_19| 2147483648)) (<= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_19| 2147483647) (= v_~p_dw_st~0_118 1) (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_19|) (<= 0 (+ ~q_buf_0~0 2147483648)) (= v_~q_req_up~0_90 1) (= v_~p_dw_pc~0_36 1) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_19| 1))) (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_19| 0)) (not (= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_19| 0)))) (and (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_19| 0)) (= ~p_dw_st~0 0))))) (= ~c_dr_st~0 1))' at error location [2023-12-02 12:43:04,158 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:43:04,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:43:04,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 51 [2023-12-02 12:43:04,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198402402] [2023-12-02 12:43:04,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:43:04,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-02 12:43:04,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:04,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-02 12:43:04,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=954, Invalid=10602, Unknown=0, NotChecked=0, Total=11556 [2023-12-02 12:43:04,163 INFO L87 Difference]: Start difference. First operand 2060 states and 2714 transitions. Second operand has 51 states, 34 states have (on average 6.264705882352941) internal successors, (213), 39 states have internal predecessors, (213), 24 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 23 states have call predecessors, (51), 24 states have call successors, (51) [2023-12-02 12:43:12,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:12,684 INFO L93 Difference]: Finished difference Result 4265 states and 5293 transitions. [2023-12-02 12:43:12,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2023-12-02 12:43:12,685 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 34 states have (on average 6.264705882352941) internal successors, (213), 39 states have internal predecessors, (213), 24 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 23 states have call predecessors, (51), 24 states have call successors, (51) Word has length 124 [2023-12-02 12:43:12,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:12,698 INFO L225 Difference]: With dead ends: 4265 [2023-12-02 12:43:12,698 INFO L226 Difference]: Without dead ends: 3194 [2023-12-02 12:43:12,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 310 SyntacticMatches, 9 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 17925 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=4299, Invalid=39173, Unknown=0, NotChecked=0, Total=43472 [2023-12-02 12:43:12,704 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 4876 mSDsluCounter, 3335 mSDsCounter, 0 mSdLazyCounter, 6373 mSolverCounterSat, 2324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4876 SdHoareTripleChecker+Valid, 3588 SdHoareTripleChecker+Invalid, 8697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2324 IncrementalHoareTripleChecker+Valid, 6373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:12,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4876 Valid, 3588 Invalid, 8697 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2324 Valid, 6373 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-12-02 12:43:12,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3194 states. [2023-12-02 12:43:13,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3194 to 1876. [2023-12-02 12:43:13,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1435 states have (on average 1.3156794425087108) internal successors, (1888), 1451 states have internal predecessors, (1888), 258 states have call successors, (258), 159 states have call predecessors, (258), 181 states have return successors, (350), 267 states have call predecessors, (350), 257 states have call successors, (350) [2023-12-02 12:43:13,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 2496 transitions. [2023-12-02 12:43:13,023 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 2496 transitions. Word has length 124 [2023-12-02 12:43:13,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:13,023 INFO L495 AbstractCegarLoop]: Abstraction has 1876 states and 2496 transitions. [2023-12-02 12:43:13,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 34 states have (on average 6.264705882352941) internal successors, (213), 39 states have internal predecessors, (213), 24 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 23 states have call predecessors, (51), 24 states have call successors, (51) [2023-12-02 12:43:13,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 2496 transitions. [2023-12-02 12:43:13,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-02 12:43:13,027 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:13,027 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 12:43:13,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 12:43:13,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:43:13,228 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:43:13,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:13,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1455298258, now seen corresponding path program 1 times [2023-12-02 12:43:13,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:13,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747249492] [2023-12-02 12:43:13,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:13,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:13,380 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 12:43:13,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:13,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747249492] [2023-12-02 12:43:13,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747249492] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:43:13,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243710609] [2023-12-02 12:43:13,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:13,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:43:13,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:43:13,382 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:43:13,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 12:43:13,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:13,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 12:43:13,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:43:13,601 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 12:43:13,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:43:13,762 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 12:43:13,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243710609] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 12:43:13,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:43:13,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2023-12-02 12:43:13,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981245841] [2023-12-02 12:43:13,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:13,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 12:43:13,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:13,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 12:43:13,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-12-02 12:43:13,765 INFO L87 Difference]: Start difference. First operand 1876 states and 2496 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 12:43:14,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:14,838 INFO L93 Difference]: Finished difference Result 2531 states and 3237 transitions. [2023-12-02 12:43:14,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 12:43:14,839 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 12:43:14,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:14,848 INFO L225 Difference]: With dead ends: 2531 [2023-12-02 12:43:14,849 INFO L226 Difference]: Without dead ends: 1644 [2023-12-02 12:43:14,851 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 12:43:14,852 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 761 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:14,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [762 Valid, 851 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1058 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 12:43:14,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2023-12-02 12:43:15,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1607. [2023-12-02 12:43:15,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1236 states have (on average 1.3292880258899675) internal successors, (1643), 1252 states have internal predecessors, (1643), 222 states have call successors, (222), 129 states have call predecessors, (222), 147 states have return successors, (309), 227 states have call predecessors, (309), 221 states have call successors, (309) [2023-12-02 12:43:15,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 2174 transitions. [2023-12-02 12:43:15,106 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 2174 transitions. Word has length 125 [2023-12-02 12:43:15,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:15,107 INFO L495 AbstractCegarLoop]: Abstraction has 1607 states and 2174 transitions. [2023-12-02 12:43:15,107 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 12:43:15,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 2174 transitions. [2023-12-02 12:43:15,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-02 12:43:15,110 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:15,111 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:43:15,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 12:43:15,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:43:15,311 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:43:15,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:15,312 INFO L85 PathProgramCache]: Analyzing trace with hash 675376159, now seen corresponding path program 1 times [2023-12-02 12:43:15,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:15,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790052308] [2023-12-02 12:43:15,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:15,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:15,434 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 12:43:15,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:15,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790052308] [2023-12-02 12:43:15,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790052308] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:43:15,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000309068] [2023-12-02 12:43:15,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:15,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:43:15,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:43:15,437 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:43:15,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 12:43:15,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:15,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:43:15,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:43:15,708 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 12:43:15,708 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:43:15,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000309068] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:15,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:43:15,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 12:43:15,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781707744] [2023-12-02 12:43:15,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:15,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:43:15,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:15,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:43:15,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:43:15,710 INFO L87 Difference]: Start difference. First operand 1607 states and 2174 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 12:43:16,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:16,222 INFO L93 Difference]: Finished difference Result 3335 states and 4981 transitions. [2023-12-02 12:43:16,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:43:16,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 130 [2023-12-02 12:43:16,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:16,237 INFO L225 Difference]: With dead ends: 3335 [2023-12-02 12:43:16,237 INFO L226 Difference]: Without dead ends: 2463 [2023-12-02 12:43:16,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 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 12:43:16,241 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 336 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:16,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 528 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:16,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2023-12-02 12:43:16,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 2456. [2023-12-02 12:43:16,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2456 states, 1958 states have (on average 1.3820224719101124) internal successors, (2706), 1977 states have internal predecessors, (2706), 319 states have call successors, (319), 159 states have call predecessors, (319), 177 states have return successors, (460), 321 states have call predecessors, (460), 318 states have call successors, (460) [2023-12-02 12:43:16,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 3485 transitions. [2023-12-02 12:43:16,598 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 3485 transitions. Word has length 130 [2023-12-02 12:43:16,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:16,598 INFO L495 AbstractCegarLoop]: Abstraction has 2456 states and 3485 transitions. [2023-12-02 12:43:16,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 12:43:16,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 3485 transitions. [2023-12-02 12:43:16,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-02 12:43:16,602 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:16,603 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:43:16,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-02 12:43:16,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:43:16,804 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:43:16,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:16,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1772659425, now seen corresponding path program 1 times [2023-12-02 12:43:16,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:16,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068402122] [2023-12-02 12:43:16,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:16,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:16,907 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 12:43:16,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:16,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068402122] [2023-12-02 12:43:16,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068402122] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:43:16,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553739991] [2023-12-02 12:43:16,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:16,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:43:16,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:43:16,909 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:43:16,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 12:43:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:17,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:43:17,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:43:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 12:43:17,134 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:43:17,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553739991] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:17,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:43:17,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 12:43:17,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015733194] [2023-12-02 12:43:17,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:17,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:43:17,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:17,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:43:17,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:43:17,136 INFO L87 Difference]: Start difference. First operand 2456 states and 3485 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 12:43:17,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:17,803 INFO L93 Difference]: Finished difference Result 5867 states and 8997 transitions. [2023-12-02 12:43:17,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:43:17,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 130 [2023-12-02 12:43:17,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:17,822 INFO L225 Difference]: With dead ends: 5867 [2023-12-02 12:43:17,822 INFO L226 Difference]: Without dead ends: 4146 [2023-12-02 12:43:17,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 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 12:43:17,831 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 339 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:17,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 528 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:17,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4146 states. [2023-12-02 12:43:18,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4146 to 4134. [2023-12-02 12:43:18,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4134 states, 3387 states have (on average 1.4177738411573664) internal successors, (4802), 3412 states have internal predecessors, (4802), 508 states have call successors, (508), 219 states have call predecessors, (508), 237 states have return successors, (753), 504 states have call predecessors, (753), 507 states have call successors, (753) [2023-12-02 12:43:18,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4134 states to 4134 states and 6063 transitions. [2023-12-02 12:43:18,390 INFO L78 Accepts]: Start accepts. Automaton has 4134 states and 6063 transitions. Word has length 130 [2023-12-02 12:43:18,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:18,390 INFO L495 AbstractCegarLoop]: Abstraction has 4134 states and 6063 transitions. [2023-12-02 12:43:18,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 12:43:18,391 INFO L276 IsEmpty]: Start isEmpty. Operand 4134 states and 6063 transitions. [2023-12-02 12:43:18,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-02 12:43:18,400 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:18,400 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:43:18,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 12:43:18,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-02 12:43:18,601 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:43:18,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:18,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1942346975, now seen corresponding path program 1 times [2023-12-02 12:43:18,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:18,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75086334] [2023-12-02 12:43:18,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:18,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 12:43:18,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:18,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75086334] [2023-12-02 12:43:18,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75086334] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:43:18,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62897633] [2023-12-02 12:43:18,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:18,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:43:18,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:43:18,749 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:43:18,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 12:43:18,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:19,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:43:19,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:43:19,064 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 12:43:19,064 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:43:19,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62897633] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:19,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:43:19,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 12:43:19,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340006348] [2023-12-02 12:43:19,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:19,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:43:19,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:19,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:43:19,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:43:19,066 INFO L87 Difference]: Start difference. First operand 4134 states and 6063 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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 12:43:19,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:19,983 INFO L93 Difference]: Finished difference Result 10871 states and 16888 transitions. [2023-12-02 12:43:19,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:43:19,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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 130 [2023-12-02 12:43:19,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:20,006 INFO L225 Difference]: With dead ends: 10871 [2023-12-02 12:43:20,007 INFO L226 Difference]: Without dead ends: 7472 [2023-12-02 12:43:20,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 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 12:43:20,025 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 318 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:20,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 528 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:20,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7472 states. [2023-12-02 12:43:20,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7472 to 7450. [2023-12-02 12:43:20,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7450 states, 6215 states have (on average 1.437489943684634) internal successors, (8934), 6252 states have internal predecessors, (8934), 876 states have call successors, (876), 339 states have call predecessors, (876), 357 states have return successors, (1321), 860 states have call predecessors, (1321), 875 states have call successors, (1321) [2023-12-02 12:43:20,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7450 states to 7450 states and 11131 transitions. [2023-12-02 12:43:20,966 INFO L78 Accepts]: Start accepts. Automaton has 7450 states and 11131 transitions. Word has length 130 [2023-12-02 12:43:20,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:20,966 INFO L495 AbstractCegarLoop]: Abstraction has 7450 states and 11131 transitions. [2023-12-02 12:43:20,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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 12:43:20,966 INFO L276 IsEmpty]: Start isEmpty. Operand 7450 states and 11131 transitions. [2023-12-02 12:43:20,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-02 12:43:20,979 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:20,980 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:43:20,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 12:43:21,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:43:21,181 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:43:21,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:21,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1607114785, now seen corresponding path program 1 times [2023-12-02 12:43:21,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:21,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142267740] [2023-12-02 12:43:21,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:21,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 12:43:21,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:21,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142267740] [2023-12-02 12:43:21,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142267740] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:43:21,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574849780] [2023-12-02 12:43:21,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:21,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:43:21,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:43:21,316 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:43:21,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 12:43:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:21,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 957 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:43:21,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:43:21,578 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 12:43:21,578 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:43:21,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574849780] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:21,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:43:21,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 12:43:21,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022640945] [2023-12-02 12:43:21,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:21,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:43:21,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:21,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:43:21,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:43:21,580 INFO L87 Difference]: Start difference. First operand 7450 states and 11131 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 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 12:43:23,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:23,097 INFO L93 Difference]: Finished difference Result 20759 states and 32388 transitions. [2023-12-02 12:43:23,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:43:23,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 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 130 [2023-12-02 12:43:23,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:23,152 INFO L225 Difference]: With dead ends: 20759 [2023-12-02 12:43:23,153 INFO L226 Difference]: Without dead ends: 14044 [2023-12-02 12:43:23,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 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 12:43:23,189 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 324 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:23,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 528 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:23,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14044 states. [2023-12-02 12:43:24,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14044 to 14002. [2023-12-02 12:43:24,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14002 states, 11811 states have (on average 1.4459402252137838) internal successors, (17078), 11872 states have internal predecessors, (17078), 1592 states have call successors, (1592), 579 states have call predecessors, (1592), 597 states have return successors, (2421), 1552 states have call predecessors, (2421), 1591 states have call successors, (2421) [2023-12-02 12:43:24,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14002 states to 14002 states and 21091 transitions. [2023-12-02 12:43:24,721 INFO L78 Accepts]: Start accepts. Automaton has 14002 states and 21091 transitions. Word has length 130 [2023-12-02 12:43:24,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:24,721 INFO L495 AbstractCegarLoop]: Abstraction has 14002 states and 21091 transitions. [2023-12-02 12:43:24,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 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 12:43:24,722 INFO L276 IsEmpty]: Start isEmpty. Operand 14002 states and 21091 transitions. [2023-12-02 12:43:24,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-02 12:43:24,743 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:24,743 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:43:24,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 12:43:24,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:43:24,944 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:43:24,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:24,944 INFO L85 PathProgramCache]: Analyzing trace with hash 994863587, now seen corresponding path program 1 times [2023-12-02 12:43:24,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:24,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769701401] [2023-12-02 12:43:24,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:24,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:25,081 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 12:43:25,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:25,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769701401] [2023-12-02 12:43:25,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769701401] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:43:25,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448538058] [2023-12-02 12:43:25,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:25,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:43:25,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:43:25,084 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:43:25,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 12:43:25,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:25,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 951 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:43:25,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:43:25,369 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:43:25,369 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:43:25,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448538058] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:25,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:43:25,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 12:43:25,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283990673] [2023-12-02 12:43:25,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:25,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:43:25,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:25,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:43:25,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:43:25,371 INFO L87 Difference]: Start difference. First operand 14002 states and 21091 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 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 12:43:27,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:27,772 INFO L93 Difference]: Finished difference Result 40295 states and 62824 transitions. [2023-12-02 12:43:27,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:43:27,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 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 130 [2023-12-02 12:43:27,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:27,849 INFO L225 Difference]: With dead ends: 40295 [2023-12-02 12:43:27,849 INFO L226 Difference]: Without dead ends: 27028 [2023-12-02 12:43:27,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 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 12:43:27,882 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 315 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:27,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 528 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:27,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27028 states. [2023-12-02 12:43:30,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27028 to 26946. [2023-12-02 12:43:30,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26946 states, 22883 states have (on average 1.4476248743608793) internal successors, (33126), 22992 states have internal predecessors, (33126), 2984 states have call successors, (2984), 1059 states have call predecessors, (2984), 1077 states have return successors, (4549), 2896 states have call predecessors, (4549), 2983 states have call successors, (4549) [2023-12-02 12:43:30,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26946 states to 26946 states and 40659 transitions. [2023-12-02 12:43:30,685 INFO L78 Accepts]: Start accepts. Automaton has 26946 states and 40659 transitions. Word has length 130 [2023-12-02 12:43:30,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:30,686 INFO L495 AbstractCegarLoop]: Abstraction has 26946 states and 40659 transitions. [2023-12-02 12:43:30,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 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 12:43:30,686 INFO L276 IsEmpty]: Start isEmpty. Operand 26946 states and 40659 transitions. [2023-12-02 12:43:30,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-02 12:43:30,709 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:30,710 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:43:30,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 12:43:30,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:43:30,910 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:43:30,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:30,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1459208735, now seen corresponding path program 1 times [2023-12-02 12:43:30,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:30,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198401387] [2023-12-02 12:43:30,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:30,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:31,024 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 12:43:31,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:31,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198401387] [2023-12-02 12:43:31,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198401387] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:43:31,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566281879] [2023-12-02 12:43:31,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:31,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:43:31,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:43:31,026 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:43:31,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 12:43:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:31,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 945 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:43:31,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:43:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 12:43:31,241 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:43:31,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566281879] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:31,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:43:31,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 12:43:31,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850360758] [2023-12-02 12:43:31,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:31,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:43:31,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:31,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:43:31,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:43:31,243 INFO L87 Difference]: Start difference. First operand 26946 states and 40659 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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 12:43:36,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:36,436 INFO L93 Difference]: Finished difference Result 78887 states and 122568 transitions. [2023-12-02 12:43:36,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:43:36,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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 130 [2023-12-02 12:43:36,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:36,635 INFO L225 Difference]: With dead ends: 78887 [2023-12-02 12:43:36,635 INFO L226 Difference]: Without dead ends: 52676 [2023-12-02 12:43:36,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 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 12:43:36,713 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 330 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:36,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 528 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:36,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52676 states. [2023-12-02 12:43:41,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52676 to 52514. [2023-12-02 12:43:41,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52514 states, 44787 states have (on average 1.4455533971911492) internal successors, (64742), 44992 states have internal predecessors, (64742), 5688 states have call successors, (5688), 2019 states have call predecessors, (5688), 2037 states have return successors, (8661), 5504 states have call predecessors, (8661), 5687 states have call successors, (8661) [2023-12-02 12:43:41,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52514 states to 52514 states and 79091 transitions. [2023-12-02 12:43:41,767 INFO L78 Accepts]: Start accepts. Automaton has 52514 states and 79091 transitions. Word has length 130 [2023-12-02 12:43:41,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:41,768 INFO L495 AbstractCegarLoop]: Abstraction has 52514 states and 79091 transitions. [2023-12-02 12:43:41,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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 12:43:41,768 INFO L276 IsEmpty]: Start isEmpty. Operand 52514 states and 79091 transitions. [2023-12-02 12:43:41,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-02 12:43:41,814 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:41,814 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:43:41,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-02 12:43:42,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fa18d9-2292-4f81-b29b-89a7a65f8d44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-02 12:43:42,016 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:43:42,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:42,016 INFO L85 PathProgramCache]: Analyzing trace with hash -87675357, now seen corresponding path program 1 times [2023-12-02 12:43:42,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:42,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464265845] [2023-12-02 12:43:42,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:42,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:42,328 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 12:43:42,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:42,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464265845] [2023-12-02 12:43:42,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464265845] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:42,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:43:42,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 12:43:42,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716566167] [2023-12-02 12:43:42,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:42,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:43:42,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:42,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:43:42,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:43:42,330 INFO L87 Difference]: Start difference. First operand 52514 states and 79091 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 12:43:52,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:52,903 INFO L93 Difference]: Finished difference Result 166310 states and 254133 transitions. [2023-12-02 12:43:52,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 12:43:52,904 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 130 [2023-12-02 12:43:52,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:53,251 INFO L225 Difference]: With dead ends: 166310 [2023-12-02 12:43:53,251 INFO L226 Difference]: Without dead ends: 114532 [2023-12-02 12:43:53,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-12-02 12:43:53,360 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 885 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:53,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [915 Valid, 998 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 12:43:53,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114532 states. [2023-12-02 12:44:03,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114532 to 102370. [2023-12-02 12:44:03,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102370 states, 87475 states have (on average 1.4410288653901115) internal successors, (126054), 87872 states have internal predecessors, (126054), 10936 states have call successors, (10936), 3939 states have call predecessors, (10936), 3957 states have return successors, (16597), 10560 states have call predecessors, (16597), 10935 states have call successors, (16597) [2023-12-02 12:44:04,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102370 states to 102370 states and 153587 transitions. [2023-12-02 12:44:04,025 INFO L78 Accepts]: Start accepts. Automaton has 102370 states and 153587 transitions. Word has length 130 [2023-12-02 12:44:04,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:04,026 INFO L495 AbstractCegarLoop]: Abstraction has 102370 states and 153587 transitions. [2023-12-02 12:44:04,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 12:44:04,026 INFO L276 IsEmpty]: Start isEmpty. Operand 102370 states and 153587 transitions. [2023-12-02 12:44:04,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-12-02 12:44:04,094 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:04,094 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:44:04,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-12-02 12:44:04,094 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:44:04,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:04,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1834181208, now seen corresponding path program 1 times [2023-12-02 12:44:04,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:04,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412634646] [2023-12-02 12:44:04,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:04,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:04,451 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 12:44:04,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:04,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412634646] [2023-12-02 12:44:04,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412634646] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:04,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:44:04,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 12:44:04,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243124768] [2023-12-02 12:44:04,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:04,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:44:04,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:04,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:44:04,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:44:04,453 INFO L87 Difference]: Start difference. First operand 102370 states and 153587 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 12:44:19,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:19,878 INFO L93 Difference]: Finished difference Result 264582 states and 401205 transitions. [2023-12-02 12:44:19,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 12:44:19,878 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 132 [2023-12-02 12:44:19,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:20,450 INFO L225 Difference]: With dead ends: 264582 [2023-12-02 12:44:20,450 INFO L226 Difference]: Without dead ends: 162948 [2023-12-02 12:44:20,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-12-02 12:44:20,694 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 851 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:20,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [867 Valid, 978 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 12:44:20,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162948 states. [2023-12-02 12:44:35,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162948 to 151906. [2023-12-02 12:44:36,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151906 states, 129843 states have (on average 1.4368583597113438) internal successors, (186566), 130432 states have internal predecessors, (186566), 16184 states have call successors, (16184), 5859 states have call predecessors, (16184), 5877 states have return successors, (24533), 15616 states have call predecessors, (24533), 16183 states have call successors, (24533) [2023-12-02 12:44:36,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151906 states to 151906 states and 227283 transitions. [2023-12-02 12:44:36,866 INFO L78 Accepts]: Start accepts. Automaton has 151906 states and 227283 transitions. Word has length 132 [2023-12-02 12:44:36,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:36,866 INFO L495 AbstractCegarLoop]: Abstraction has 151906 states and 227283 transitions. [2023-12-02 12:44:36,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 12:44:36,867 INFO L276 IsEmpty]: Start isEmpty. Operand 151906 states and 227283 transitions. [2023-12-02 12:44:37,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-12-02 12:44:37,001 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:37,001 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:44:37,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-12-02 12:44:37,002 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:44:37,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:37,002 INFO L85 PathProgramCache]: Analyzing trace with hash -222837149, now seen corresponding path program 1 times [2023-12-02 12:44:37,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:37,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744798568] [2023-12-02 12:44:37,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:37,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:37,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:37,334 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 12:44:37,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:37,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744798568] [2023-12-02 12:44:37,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744798568] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:37,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:44:37,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 12:44:37,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033825719] [2023-12-02 12:44:37,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:37,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:44:37,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:37,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:44:37,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:44:37,336 INFO L87 Difference]: Start difference. First operand 151906 states and 227283 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 12:45:02,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:45:02,017 INFO L93 Difference]: Finished difference Result 391398 states and 586709 transitions. [2023-12-02 12:45:02,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:45:02,018 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 134 [2023-12-02 12:45:02,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:45:02,866 INFO L225 Difference]: With dead ends: 391398 [2023-12-02 12:45:02,866 INFO L226 Difference]: Without dead ends: 240228 [2023-12-02 12:45:03,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-12-02 12:45:03,349 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 860 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:45:03,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [890 Valid, 857 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:45:03,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240228 states. [2023-12-02 12:45:28,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240228 to 240226. [2023-12-02 12:45:28,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240226 states, 205299 states have (on average 1.4310737022586568) internal successors, (293798), 206272 states have internal predecessors, (293798), 25592 states have call successors, (25592), 9315 states have call predecessors, (25592), 9333 states have return successors, (39893), 24640 states have call predecessors, (39893), 25591 states have call successors, (39893) [2023-12-02 12:45:30,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240226 states to 240226 states and 359283 transitions. [2023-12-02 12:45:30,243 INFO L78 Accepts]: Start accepts. Automaton has 240226 states and 359283 transitions. Word has length 134 [2023-12-02 12:45:30,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:45:30,244 INFO L495 AbstractCegarLoop]: Abstraction has 240226 states and 359283 transitions. [2023-12-02 12:45:30,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 12:45:30,244 INFO L276 IsEmpty]: Start isEmpty. Operand 240226 states and 359283 transitions. [2023-12-02 12:45:30,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-12-02 12:45:30,401 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:45:30,401 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:45:30,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-12-02 12:45:30,401 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:45:30,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:45:30,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1327749150, now seen corresponding path program 1 times [2023-12-02 12:45:30,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:45:30,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030132643] [2023-12-02 12:45:30,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:45:30,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:45:30,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:45:30,886 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 12:45:30,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:45:30,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030132643] [2023-12-02 12:45:30,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030132643] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:45:30,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:45:30,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 12:45:30,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246520923] [2023-12-02 12:45:30,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:45:30,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:45:30,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:45:30,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:45:30,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:45:30,889 INFO L87 Difference]: Start difference. First operand 240226 states and 359283 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 12:46:10,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:46:10,153 INFO L93 Difference]: Finished difference Result 614438 states and 929909 transitions. [2023-12-02 12:46:10,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 12:46:10,154 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 136 [2023-12-02 12:46:10,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:46:11,743 INFO L225 Difference]: With dead ends: 614438 [2023-12-02 12:46:11,744 INFO L226 Difference]: Without dead ends: 374948 [2023-12-02 12:46:12,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-12-02 12:46:12,338 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 846 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:46:12,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [862 Valid, 946 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 12:46:12,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374948 states. [2023-12-02 12:46:52,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374948 to 356898. [2023-12-02 12:46:52,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356898 states, 305011 states have (on average 1.4263288864991754) internal successors, (435046), 306464 states have internal predecessors, (435046), 37944 states have call successors, (37944), 13923 states have call predecessors, (37944), 13941 states have return successors, (59045), 36512 states have call predecessors, (59045), 37943 states have call successors, (59045) [2023-12-02 12:46:54,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356898 states to 356898 states and 532035 transitions. [2023-12-02 12:46:54,726 INFO L78 Accepts]: Start accepts. Automaton has 356898 states and 532035 transitions. Word has length 136 [2023-12-02 12:46:54,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:46:54,726 INFO L495 AbstractCegarLoop]: Abstraction has 356898 states and 532035 transitions. [2023-12-02 12:46:54,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 12:46:54,726 INFO L276 IsEmpty]: Start isEmpty. Operand 356898 states and 532035 transitions. [2023-12-02 12:46:54,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-12-02 12:46:54,947 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:46:54,947 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:46:54,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-12-02 12:46:54,948 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:46:54,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:46:54,948 INFO L85 PathProgramCache]: Analyzing trace with hash 360822627, now seen corresponding path program 1 times [2023-12-02 12:46:54,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:46:54,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877945879] [2023-12-02 12:46:54,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:46:54,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:46:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:46:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 12:46:55,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:46:55,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877945879] [2023-12-02 12:46:55,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877945879] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:46:55,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:46:55,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 12:46:55,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145541797] [2023-12-02 12:46:55,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:46:55,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:46:55,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:46:55,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:46:55,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:46:55,592 INFO L87 Difference]: Start difference. First operand 356898 states and 532035 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 12:47:55,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:47:55,179 INFO L93 Difference]: Finished difference Result 904966 states and 1365797 transitions. [2023-12-02 12:47:55,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 12:47:55,180 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 138 [2023-12-02 12:47:55,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:47:57,445 INFO L225 Difference]: With dead ends: 904966 [2023-12-02 12:47:57,445 INFO L226 Difference]: Without dead ends: 548804 [2023-12-02 12:47:58,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-12-02 12:47:58,489 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 843 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:47:58,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [859 Valid, 770 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:47:58,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548804 states. [2023-12-02 12:48:59,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548804 to 530370. [2023-12-02 12:48:59,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530370 states, 453235 states have (on average 1.4214039074652223) internal successors, (644230), 455408 states have internal predecessors, (644230), 56280 states have call successors, (56280), 20835 states have call predecessors, (56280), 20853 states have return successors, (87413), 54128 states have call predecessors, (87413), 56279 states have call successors, (87413) [2023-12-02 12:49:02,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530370 states to 530370 states and 787923 transitions. [2023-12-02 12:49:02,802 INFO L78 Accepts]: Start accepts. Automaton has 530370 states and 787923 transitions. Word has length 138 [2023-12-02 12:49:02,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:49:02,803 INFO L495 AbstractCegarLoop]: Abstraction has 530370 states and 787923 transitions. [2023-12-02 12:49:02,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 12:49:02,803 INFO L276 IsEmpty]: Start isEmpty. Operand 530370 states and 787923 transitions. [2023-12-02 12:49:03,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-12-02 12:49:03,148 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:49:03,148 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:49:03,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-12-02 12:49:03,149 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:49:03,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:49:03,149 INFO L85 PathProgramCache]: Analyzing trace with hash -293743960, now seen corresponding path program 1 times [2023-12-02 12:49:03,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:49:03,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086991341] [2023-12-02 12:49:03,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:49:03,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:49:03,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:49:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 12:49:03,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:49:03,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086991341] [2023-12-02 12:49:03,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086991341] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:49:03,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:49:03,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 12:49:03,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599815611] [2023-12-02 12:49:03,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:49:03,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:49:03,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:49:03,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:49:03,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:49:03,460 INFO L87 Difference]: Start difference. First operand 530370 states and 787923 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)