./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/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_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/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_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/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 4ea93d7c6d06d46004840cc5fcb436c7c307334e6ee754b8ee507b78f644445d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:03:05,954 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:03:06,021 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 13:03:06,025 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:03:06,026 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:03:06,050 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:03:06,051 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:03:06,051 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:03:06,052 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:03:06,052 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:03:06,053 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:03:06,053 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:03:06,054 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:03:06,054 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 13:03:06,055 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:03:06,055 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:03:06,056 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 13:03:06,057 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 13:03:06,057 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:03:06,058 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 13:03:06,058 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 13:03:06,060 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 13:03:06,061 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:03:06,062 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 13:03:06,062 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 13:03:06,063 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:03:06,064 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 13:03:06,064 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:03:06,064 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 13:03:06,065 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:03:06,065 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 13:03:06,065 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 13:03:06,066 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 13:03:06,066 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:03:06,066 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:03:06,066 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:03:06,067 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:03:06,067 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:03:06,067 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:03:06,067 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:03:06,067 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 13:03:06,068 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 13:03:06,068 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 13:03:06,068 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:03:06,068 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 13:03:06,068 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:03:06,069 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:03:06,069 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_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ea93d7c6d06d46004840cc5fcb436c7c307334e6ee754b8ee507b78f644445d [2023-12-02 13:03:06,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:03:06,337 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:03:06,340 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:03:06,342 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:03:06,342 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:03:06,344 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c [2023-12-02 13:03:09,230 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:03:09,444 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:03:09,444 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c [2023-12-02 13:03:09,459 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/data/7a3e4b6cb/832d6030685b42cc9ca29c2573ddad0e/FLAGfa82f68b1 [2023-12-02 13:03:09,474 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/data/7a3e4b6cb/832d6030685b42cc9ca29c2573ddad0e [2023-12-02 13:03:09,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:03:09,479 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:03:09,481 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:03:09,481 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:03:09,487 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:03:09,488 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:03:09" (1/1) ... [2023-12-02 13:03:09,490 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@702e460b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:09, skipping insertion in model container [2023-12-02 13:03:09,490 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:03:09" (1/1) ... [2023-12-02 13:03:09,546 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:03:09,715 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_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c[914,927] [2023-12-02 13:03:09,774 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_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c[7115,7128] [2023-12-02 13:03:09,820 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:03:09,834 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:03:09,848 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_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c[914,927] [2023-12-02 13:03:09,871 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_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c[7115,7128] [2023-12-02 13:03:09,897 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:03:09,921 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:03:09,921 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:09 WrapperNode [2023-12-02 13:03:09,921 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:03:09,923 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:03:09,923 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:03:09,923 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:03:09,932 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:09" (1/1) ... [2023-12-02 13:03:09,945 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:09" (1/1) ... [2023-12-02 13:03:09,982 INFO L138 Inliner]: procedures = 57, calls = 64, calls flagged for inlining = 25, calls inlined = 25, statements flattened = 476 [2023-12-02 13:03:09,982 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:03:09,983 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:03:09,983 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:03:09,983 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:03:09,994 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:09" (1/1) ... [2023-12-02 13:03:09,994 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:09" (1/1) ... [2023-12-02 13:03:09,998 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:09" (1/1) ... [2023-12-02 13:03:09,999 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:09" (1/1) ... [2023-12-02 13:03:10,011 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:09" (1/1) ... [2023-12-02 13:03:10,021 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:09" (1/1) ... [2023-12-02 13:03:10,024 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:09" (1/1) ... [2023-12-02 13:03:10,027 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:09" (1/1) ... [2023-12-02 13:03:10,031 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:03:10,033 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:03:10,033 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:03:10,033 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:03:10,034 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:09" (1/1) ... [2023-12-02 13:03:10,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:03:10,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:03:10,065 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:03:10,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:03:10,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:03:10,104 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 13:03:10,104 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 13:03:10,104 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-12-02 13:03:10,104 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-12-02 13:03:10,105 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-12-02 13:03:10,105 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-12-02 13:03:10,105 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-12-02 13:03:10,105 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-12-02 13:03:10,105 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-12-02 13:03:10,106 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-12-02 13:03:10,106 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-12-02 13:03:10,106 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-12-02 13:03:10,106 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-12-02 13:03:10,106 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-12-02 13:03:10,106 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-12-02 13:03:10,107 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-12-02 13:03:10,107 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-12-02 13:03:10,107 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-12-02 13:03:10,107 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-12-02 13:03:10,107 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-12-02 13:03:10,107 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-12-02 13:03:10,108 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-12-02 13:03:10,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 13:03:10,108 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-12-02 13:03:10,108 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-12-02 13:03:10,108 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-12-02 13:03:10,108 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-12-02 13:03:10,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:03:10,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:03:10,109 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-12-02 13:03:10,109 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-12-02 13:03:10,109 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2023-12-02 13:03:10,109 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2023-12-02 13:03:10,219 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:03:10,221 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:03:10,755 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:03:10,946 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:03:10,946 INFO L309 CfgBuilder]: Removed 9 assume(true) statements. [2023-12-02 13:03:10,948 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:03:10 BoogieIcfgContainer [2023-12-02 13:03:10,948 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:03:10,951 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:03:10,951 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:03:10,954 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:03:10,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:03:09" (1/3) ... [2023-12-02 13:03:10,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20876c42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:03:10, skipping insertion in model container [2023-12-02 13:03:10,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:09" (2/3) ... [2023-12-02 13:03:10,956 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20876c42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:03:10, skipping insertion in model container [2023-12-02 13:03:10,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:03:10" (3/3) ... [2023-12-02 13:03:10,958 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.02.cil-2.c [2023-12-02 13:03:10,977 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:03:10,977 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 13:03:11,030 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:03:11,037 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;@457819a6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:03:11,037 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 13:03:11,041 INFO L276 IsEmpty]: Start isEmpty. Operand has 159 states, 109 states have (on average 1.4862385321100917) internal successors, (162), 117 states have internal predecessors, (162), 32 states have call successors, (32), 15 states have call predecessors, (32), 15 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2023-12-02 13:03:11,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 13:03:11,052 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:03:11,052 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] [2023-12-02 13:03:11,053 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:03:11,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:03:11,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1598548224, now seen corresponding path program 1 times [2023-12-02 13:03:11,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:03:11,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206787197] [2023-12-02 13:03:11,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:03:11,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:03:11,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:03:11,432 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 13:03:11,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:03:11,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206787197] [2023-12-02 13:03:11,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206787197] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:03:11,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:03:11,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 13:03:11,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323162290] [2023-12-02 13:03:11,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:03:11,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:03:11,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:03:11,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:03:11,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:03:11,471 INFO L87 Difference]: Start difference. First operand has 159 states, 109 states have (on average 1.4862385321100917) internal successors, (162), 117 states have internal predecessors, (162), 32 states have call successors, (32), 15 states have call predecessors, (32), 15 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 13:03:12,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:03:12,175 INFO L93 Difference]: Finished difference Result 591 states and 871 transitions. [2023-12-02 13:03:12,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:03:12,178 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2023-12-02 13:03:12,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:03:12,194 INFO L225 Difference]: With dead ends: 591 [2023-12-02 13:03:12,194 INFO L226 Difference]: Without dead ends: 427 [2023-12-02 13:03:12,199 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 13:03:12,203 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 558 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:03:12,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 571 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:03:12,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2023-12-02 13:03:12,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 414. [2023-12-02 13:03:12,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 298 states have (on average 1.3691275167785235) internal successors, (408), 306 states have internal predecessors, (408), 77 states have call successors, (77), 39 states have call predecessors, (77), 37 states have return successors, (95), 70 states have call predecessors, (95), 73 states have call successors, (95) [2023-12-02 13:03:12,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 580 transitions. [2023-12-02 13:03:12,316 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 580 transitions. Word has length 38 [2023-12-02 13:03:12,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:03:12,317 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 580 transitions. [2023-12-02 13:03:12,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 13:03:12,318 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 580 transitions. [2023-12-02 13:03:12,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 13:03:12,322 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:03:12,322 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 13:03:12,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 13:03:12,323 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:03:12,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:03:12,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1564230520, now seen corresponding path program 1 times [2023-12-02 13:03:12,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:03:12,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717544431] [2023-12-02 13:03:12,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:03:12,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:03:12,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:03:12,459 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 13:03:12,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:03:12,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717544431] [2023-12-02 13:03:12,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717544431] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:03:12,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:03:12,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 13:03:12,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334106934] [2023-12-02 13:03:12,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:03:12,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:03:12,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:03:12,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:03:12,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:03:12,464 INFO L87 Difference]: Start difference. First operand 414 states and 580 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 13:03:13,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:03:13,267 INFO L93 Difference]: Finished difference Result 889 states and 1210 transitions. [2023-12-02 13:03:13,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 13:03:13,268 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 13:03:13,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:03:13,277 INFO L225 Difference]: With dead ends: 889 [2023-12-02 13:03:13,277 INFO L226 Difference]: Without dead ends: 825 [2023-12-02 13:03:13,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-12-02 13:03:13,281 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 735 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 13:03:13,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 742 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 13:03:13,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2023-12-02 13:03:13,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 754. [2023-12-02 13:03:13,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 535 states have (on average 1.3214953271028038) internal successors, (707), 543 states have internal predecessors, (707), 132 states have call successors, (132), 87 states have call predecessors, (132), 85 states have return successors, (165), 125 states have call predecessors, (165), 128 states have call successors, (165) [2023-12-02 13:03:13,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1004 transitions. [2023-12-02 13:03:13,397 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1004 transitions. Word has length 45 [2023-12-02 13:03:13,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:03:13,397 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 1004 transitions. [2023-12-02 13:03:13,397 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 13:03:13,398 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1004 transitions. [2023-12-02 13:03:13,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 13:03:13,400 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:03:13,400 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 13:03:13,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 13:03:13,401 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:03:13,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:03:13,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1341051880, now seen corresponding path program 1 times [2023-12-02 13:03:13,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:03:13,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659053574] [2023-12-02 13:03:13,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:03:13,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:03:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:03:13,608 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 13:03:13,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:03:13,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659053574] [2023-12-02 13:03:13,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659053574] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:03:13,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:03:13,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 13:03:13,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468692155] [2023-12-02 13:03:13,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:03:13,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 13:03:13,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:03:13,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 13:03:13,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:03:13,612 INFO L87 Difference]: Start difference. First operand 754 states and 1004 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 13:03:14,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:03:14,323 INFO L93 Difference]: Finished difference Result 1515 states and 1951 transitions. [2023-12-02 13:03:14,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 13:03:14,324 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 13:03:14,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:03:14,331 INFO L225 Difference]: With dead ends: 1515 [2023-12-02 13:03:14,332 INFO L226 Difference]: Without dead ends: 1112 [2023-12-02 13:03:14,334 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 13:03:14,335 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 323 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:03:14,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 639 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:03:14,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2023-12-02 13:03:14,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1083. [2023-12-02 13:03:14,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 758 states have (on average 1.2902374670184698) internal successors, (978), 767 states have internal predecessors, (978), 188 states have call successors, (188), 135 states have call predecessors, (188), 135 states have return successors, (239), 182 states have call predecessors, (239), 184 states have call successors, (239) [2023-12-02 13:03:14,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 1405 transitions. [2023-12-02 13:03:14,418 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 1405 transitions. Word has length 46 [2023-12-02 13:03:14,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:03:14,418 INFO L495 AbstractCegarLoop]: Abstraction has 1083 states and 1405 transitions. [2023-12-02 13:03:14,418 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 13:03:14,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 1405 transitions. [2023-12-02 13:03:14,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 13:03:14,421 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:03:14,421 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 13:03:14,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 13:03:14,421 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:03:14,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:03:14,422 INFO L85 PathProgramCache]: Analyzing trace with hash -693829468, now seen corresponding path program 1 times [2023-12-02 13:03:14,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:03:14,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010527076] [2023-12-02 13:03:14,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:03:14,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:03:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:03:14,469 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 13:03:14,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:03:14,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010527076] [2023-12-02 13:03:14,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010527076] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:03:14,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:03:14,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:03:14,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695103401] [2023-12-02 13:03:14,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:03:14,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:03:14,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:03:14,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:03:14,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:03:14,472 INFO L87 Difference]: Start difference. First operand 1083 states and 1405 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 13:03:14,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:03:14,649 INFO L93 Difference]: Finished difference Result 2024 states and 2564 transitions. [2023-12-02 13:03:14,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:03:14,650 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 13:03:14,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:03:14,658 INFO L225 Difference]: With dead ends: 2024 [2023-12-02 13:03:14,658 INFO L226 Difference]: Without dead ends: 1342 [2023-12-02 13:03:14,660 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 13:03:14,661 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 68 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:03:14,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 336 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:03:14,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2023-12-02 13:03:14,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1320. [2023-12-02 13:03:14,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 919 states have (on average 1.2752992383025028) internal successors, (1172), 928 states have internal predecessors, (1172), 230 states have call successors, (230), 173 states have call predecessors, (230), 169 states have return successors, (285), 220 states have call predecessors, (285), 226 states have call successors, (285) [2023-12-02 13:03:14,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1687 transitions. [2023-12-02 13:03:14,747 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1687 transitions. Word has length 47 [2023-12-02 13:03:14,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:03:14,748 INFO L495 AbstractCegarLoop]: Abstraction has 1320 states and 1687 transitions. [2023-12-02 13:03:14,748 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 13:03:14,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1687 transitions. [2023-12-02 13:03:14,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-02 13:03:14,751 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:03:14,752 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 13:03:14,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 13:03:14,752 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:03:14,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:03:14,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1638488101, now seen corresponding path program 1 times [2023-12-02 13:03:14,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:03:14,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119851874] [2023-12-02 13:03:14,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:03:14,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:03:14,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:03:14,797 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 13:03:14,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:03:14,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119851874] [2023-12-02 13:03:14,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119851874] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:03:14,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:03:14,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:03:14,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858934154] [2023-12-02 13:03:14,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:03:14,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:03:14,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:03:14,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:03:14,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:03:14,800 INFO L87 Difference]: Start difference. First operand 1320 states and 1687 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 13:03:14,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:03:14,965 INFO L93 Difference]: Finished difference Result 1726 states and 2177 transitions. [2023-12-02 13:03:14,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:03:14,966 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 13:03:14,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:03:14,973 INFO L225 Difference]: With dead ends: 1726 [2023-12-02 13:03:14,973 INFO L226 Difference]: Without dead ends: 1171 [2023-12-02 13:03:14,975 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 13:03:14,976 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 178 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:03:14,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 245 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:03:14,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2023-12-02 13:03:15,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 965. [2023-12-02 13:03:15,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 683 states have (on average 1.2723279648609078) internal successors, (869), 691 states have internal predecessors, (869), 167 states have call successors, (167), 119 states have call predecessors, (167), 113 states have return successors, (193), 156 states have call predecessors, (193), 163 states have call successors, (193) [2023-12-02 13:03:15,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1229 transitions. [2023-12-02 13:03:15,052 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1229 transitions. Word has length 53 [2023-12-02 13:03:15,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:03:15,052 INFO L495 AbstractCegarLoop]: Abstraction has 965 states and 1229 transitions. [2023-12-02 13:03:15,053 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 13:03:15,053 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1229 transitions. [2023-12-02 13:03:15,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-02 13:03:15,055 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:03:15,055 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 13:03:15,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 13:03:15,055 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:03:15,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:03:15,056 INFO L85 PathProgramCache]: Analyzing trace with hash 202237958, now seen corresponding path program 1 times [2023-12-02 13:03:15,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:03:15,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859319074] [2023-12-02 13:03:15,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:03:15,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:03:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:03:15,144 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 13:03:15,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:03:15,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859319074] [2023-12-02 13:03:15,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859319074] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:03:15,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:03:15,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:03:15,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140116560] [2023-12-02 13:03:15,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:03:15,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:03:15,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:03:15,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:03:15,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:03:15,147 INFO L87 Difference]: Start difference. First operand 965 states and 1229 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 13:03:15,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:03:15,432 INFO L93 Difference]: Finished difference Result 1220 states and 1530 transitions. [2023-12-02 13:03:15,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:03:15,432 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 13:03:15,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:03:15,440 INFO L225 Difference]: With dead ends: 1220 [2023-12-02 13:03:15,440 INFO L226 Difference]: Without dead ends: 1217 [2023-12-02 13:03:15,441 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 13:03:15,442 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 331 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:03:15,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 221 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:03:15,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2023-12-02 13:03:15,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 964. [2023-12-02 13:03:15,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 683 states have (on average 1.2635431918008784) internal successors, (863), 690 states have internal predecessors, (863), 166 states have call successors, (166), 119 states have call predecessors, (166), 113 states have return successors, (193), 156 states have call predecessors, (193), 163 states have call successors, (193) [2023-12-02 13:03:15,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1222 transitions. [2023-12-02 13:03:15,514 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1222 transitions. Word has length 54 [2023-12-02 13:03:15,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:03:15,515 INFO L495 AbstractCegarLoop]: Abstraction has 964 states and 1222 transitions. [2023-12-02 13:03:15,515 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 13:03:15,515 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1222 transitions. [2023-12-02 13:03:15,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 13:03:15,517 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:03:15,517 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 13:03:15,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 13:03:15,517 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:03:15,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:03:15,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1973678733, now seen corresponding path program 1 times [2023-12-02 13:03:15,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:03:15,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785213735] [2023-12-02 13:03:15,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:03:15,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:03:15,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:03:15,634 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 13:03:15,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:03:15,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785213735] [2023-12-02 13:03:15,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785213735] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:03:15,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906588913] [2023-12-02 13:03:15,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:03:15,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:03:15,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:03:15,640 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:03:15,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 13:03:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:03:15,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 13:03:15,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:03:16,029 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 13:03:16,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:03:16,121 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 13:03:16,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906588913] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:03:16,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1709536993] [2023-12-02 13:03:16,143 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-12-02 13:03:16,144 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:03:16,147 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:03:16,152 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:03:16,153 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:03:18,652 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 111 for LOIs [2023-12-02 13:03:18,696 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 107 for LOIs [2023-12-02 13:03:18,742 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 115 for LOIs [2023-12-02 13:03:19,300 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 111 for LOIs [2023-12-02 13:03:19,432 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 111 for LOIs [2023-12-02 13:03:19,523 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 111 for LOIs [2023-12-02 13:03:19,576 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 118 for LOIs [2023-12-02 13:03:19,624 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:03:27,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1709536993] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:03:27,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:03:27,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [5, 5, 4] total 41 [2023-12-02 13:03:27,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051234629] [2023-12-02 13:03:27,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:03:27,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-02 13:03:27,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:03:27,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-02 13:03:27,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 13:03:27,795 INFO L87 Difference]: Start difference. First operand 964 states and 1222 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 13:03:41,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:03:41,654 INFO L93 Difference]: Finished difference Result 1625 states and 1996 transitions. [2023-12-02 13:03:41,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-02 13:03:41,655 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 13:03:41,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:03:41,663 INFO L225 Difference]: With dead ends: 1625 [2023-12-02 13:03:41,664 INFO L226 Difference]: Without dead ends: 1012 [2023-12-02 13:03:41,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=601, Invalid=4091, Unknown=0, NotChecked=0, Total=4692 [2023-12-02 13:03:41,669 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 150 mSDsluCounter, 1897 mSDsCounter, 0 mSdLazyCounter, 3470 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 2047 SdHoareTripleChecker+Invalid, 3586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 3470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:03:41,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 2047 Invalid, 3586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 3470 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-12-02 13:03:41,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2023-12-02 13:03:41,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 997. [2023-12-02 13:03:41,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 708 states have (on average 1.2556497175141244) internal successors, (889), 715 states have internal predecessors, (889), 168 states have call successors, (168), 125 states have call predecessors, (168), 119 states have return successors, (195), 158 states have call predecessors, (195), 165 states have call successors, (195) [2023-12-02 13:03:41,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1252 transitions. [2023-12-02 13:03:41,821 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1252 transitions. Word has length 55 [2023-12-02 13:03:41,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:03:41,821 INFO L495 AbstractCegarLoop]: Abstraction has 997 states and 1252 transitions. [2023-12-02 13:03:41,822 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 13:03:41,822 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1252 transitions. [2023-12-02 13:03:41,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-02 13:03:41,824 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:03:41,824 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 13:03:41,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 13:03:42,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:03:42,025 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:03:42,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:03:42,026 INFO L85 PathProgramCache]: Analyzing trace with hash 954353659, now seen corresponding path program 1 times [2023-12-02 13:03:42,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:03:42,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877447912] [2023-12-02 13:03:42,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:03:42,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:03:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:03:42,102 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 13:03:42,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:03:42,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877447912] [2023-12-02 13:03:42,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877447912] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:03:42,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:03:42,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:03:42,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663507846] [2023-12-02 13:03:42,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:03:42,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:03:42,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:03:42,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:03:42,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:03:42,106 INFO L87 Difference]: Start difference. First operand 997 states and 1252 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 13:03:42,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:03:42,334 INFO L93 Difference]: Finished difference Result 1579 states and 1935 transitions. [2023-12-02 13:03:42,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:03:42,335 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 13:03:42,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:03:42,343 INFO L225 Difference]: With dead ends: 1579 [2023-12-02 13:03:42,344 INFO L226 Difference]: Without dead ends: 1206 [2023-12-02 13:03:42,345 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 13:03:42,346 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 43 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:03:42,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 380 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:03:42,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2023-12-02 13:03:42,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1118. [2023-12-02 13:03:42,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 789 states have (on average 1.244613434727503) internal successors, (982), 800 states have internal predecessors, (982), 190 states have call successors, (190), 147 states have call predecessors, (190), 137 states have return successors, (217), 172 states have call predecessors, (217), 187 states have call successors, (217) [2023-12-02 13:03:42,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1389 transitions. [2023-12-02 13:03:42,515 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1389 transitions. Word has length 61 [2023-12-02 13:03:42,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:03:42,515 INFO L495 AbstractCegarLoop]: Abstraction has 1118 states and 1389 transitions. [2023-12-02 13:03:42,515 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 13:03:42,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1389 transitions. [2023-12-02 13:03:42,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-02 13:03:42,517 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:03:42,517 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 13:03:42,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 13:03:42,517 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:03:42,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:03:42,518 INFO L85 PathProgramCache]: Analyzing trace with hash 2049353480, now seen corresponding path program 1 times [2023-12-02 13:03:42,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:03:42,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287705682] [2023-12-02 13:03:42,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:03:42,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:03:42,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:03:42,696 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 13:03:42,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:03:42,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287705682] [2023-12-02 13:03:42,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287705682] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:03:42,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:03:42,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 13:03:42,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113404669] [2023-12-02 13:03:42,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:03:42,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 13:03:42,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:03:42,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 13:03:42,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:03:42,698 INFO L87 Difference]: Start difference. First operand 1118 states and 1389 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 13:03:43,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:03:43,409 INFO L93 Difference]: Finished difference Result 2115 states and 2549 transitions. [2023-12-02 13:03:43,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 13:03:43,410 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 13:03:43,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:03:43,438 INFO L225 Difference]: With dead ends: 2115 [2023-12-02 13:03:43,438 INFO L226 Difference]: Without dead ends: 1429 [2023-12-02 13:03:43,440 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 13:03:43,441 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 301 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:03:43,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 526 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:03:43,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1429 states. [2023-12-02 13:03:43,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1429 to 1298. [2023-12-02 13:03:43,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 909 states have (on average 1.2222222222222223) internal successors, (1111), 920 states have internal predecessors, (1111), 222 states have call successors, (222), 175 states have call predecessors, (222), 165 states have return successors, (249), 204 states have call predecessors, (249), 219 states have call successors, (249) [2023-12-02 13:03:43,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 1582 transitions. [2023-12-02 13:03:43,657 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 1582 transitions. Word has length 63 [2023-12-02 13:03:43,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:03:43,657 INFO L495 AbstractCegarLoop]: Abstraction has 1298 states and 1582 transitions. [2023-12-02 13:03:43,657 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 13:03:43,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 1582 transitions. [2023-12-02 13:03:43,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-02 13:03:43,659 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:03:43,660 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 13:03:43,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 13:03:43,660 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:03:43,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:03:43,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1851769321, now seen corresponding path program 1 times [2023-12-02 13:03:43,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:03:43,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438874673] [2023-12-02 13:03:43,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:03:43,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:03:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:03:43,786 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 13:03:43,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:03:43,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438874673] [2023-12-02 13:03:43,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438874673] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:03:43,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710993023] [2023-12-02 13:03:43,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:03:43,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:03:43,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:03:43,789 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:03:43,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 13:03:43,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:03:43,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 13:03:43,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:03:44,096 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 13:03:44,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:03:44,168 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 13:03:44,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710993023] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:03:44,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [670591804] [2023-12-02 13:03:44,173 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-12-02 13:03:44,173 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:03:44,173 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:03:44,174 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:03:44,174 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:03:48,599 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 111 for LOIs [2023-12-02 13:03:48,633 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 110 for LOIs [2023-12-02 13:03:48,767 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 78 for LOIs [2023-12-02 13:03:48,866 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 115 for LOIs [2023-12-02 13:03:49,299 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 111 for LOIs [2023-12-02 13:03:49,389 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 111 for LOIs [2023-12-02 13:03:49,528 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 111 for LOIs [2023-12-02 13:03:49,587 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 118 for LOIs [2023-12-02 13:03:49,646 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:03:59,497 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31141#(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)) (= ~c_last_read~0 ~q_buf_0~0) (= ~c_dr_pc~0 0) (= ~c_last_read~0 ~p_last_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 (not (= ~p_dw_st~0 0)) (<= 1 |#StackHeapBarrier|) (= v_~c_last_read~0_10 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) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~t2_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~m_i~0 0) (= ~E_2~0 2) (not (= v_~q_free~0_42 1)) (= ~local~0 0) (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_1| 0)) (= ~token~0 0) (= ~m_pc~0 0) (= ~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) (<= v_~q_free~0_42 1) (= ~E_1~0 2) (= ~M_E~0 2) (= ~t1_i~0 0))) (= ~c_dr_st~0 1))' at error location [2023-12-02 13:03:59,498 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:03:59,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:03:59,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-12-02 13:03:59,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206921422] [2023-12-02 13:03:59,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:03:59,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:03:59,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:03:59,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:03:59,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1938, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 13:03:59,500 INFO L87 Difference]: Start difference. First operand 1298 states and 1582 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 13:04:00,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:04:00,233 INFO L93 Difference]: Finished difference Result 3505 states and 4111 transitions. [2023-12-02 13:04:00,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 13:04:00,234 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 13:04:00,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:04:00,249 INFO L225 Difference]: With dead ends: 3505 [2023-12-02 13:04:00,249 INFO L226 Difference]: Without dead ends: 3502 [2023-12-02 13:04:00,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 148 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=224, Invalid=1938, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 13:04:00,252 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 374 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:04:00,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 889 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:04:00,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3502 states. [2023-12-02 13:04:00,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3502 to 2613. [2023-12-02 13:04:00,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2613 states, 1801 states have (on average 1.195446973903387) internal successors, (2153), 1820 states have internal predecessors, (2153), 449 states have call successors, (449), 379 states have call predecessors, (449), 361 states have return successors, (488), 415 states have call predecessors, (488), 446 states have call successors, (488) [2023-12-02 13:04:00,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2613 states to 2613 states and 3090 transitions. [2023-12-02 13:04:00,580 INFO L78 Accepts]: Start accepts. Automaton has 2613 states and 3090 transitions. Word has length 64 [2023-12-02 13:04:00,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:04:00,581 INFO L495 AbstractCegarLoop]: Abstraction has 2613 states and 3090 transitions. [2023-12-02 13:04:00,581 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 13:04:00,581 INFO L276 IsEmpty]: Start isEmpty. Operand 2613 states and 3090 transitions. [2023-12-02 13:04:00,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-02 13:04:00,583 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:04:00,583 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 13:04:00,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 13:04:00,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 13:04:00,784 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:04:00,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:04:00,785 INFO L85 PathProgramCache]: Analyzing trace with hash -374044592, now seen corresponding path program 2 times [2023-12-02 13:04:00,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:04:00,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704502440] [2023-12-02 13:04:00,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:00,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:04:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:00,815 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 13:04:00,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:04:00,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704502440] [2023-12-02 13:04:00,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704502440] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:04:00,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:04:00,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:04:00,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600905719] [2023-12-02 13:04:00,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:04:00,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:04:00,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:04:00,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:04:00,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:04:00,817 INFO L87 Difference]: Start difference. First operand 2613 states and 3090 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 13:04:01,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:04:01,182 INFO L93 Difference]: Finished difference Result 3809 states and 4462 transitions. [2023-12-02 13:04:01,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:04:01,182 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 13:04:01,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:04:01,196 INFO L225 Difference]: With dead ends: 3809 [2023-12-02 13:04:01,196 INFO L226 Difference]: Without dead ends: 1871 [2023-12-02 13:04:01,201 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 13:04:01,202 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 183 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:04:01,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 287 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:04:01,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2023-12-02 13:04:01,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1855. [2023-12-02 13:04:01,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1295 states have (on average 1.1938223938223937) internal successors, (1546), 1306 states have internal predecessors, (1546), 313 states have call successors, (313), 255 states have call predecessors, (313), 245 states have return successors, (344), 295 states have call predecessors, (344), 310 states have call successors, (344) [2023-12-02 13:04:01,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 2203 transitions. [2023-12-02 13:04:01,526 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 2203 transitions. Word has length 67 [2023-12-02 13:04:01,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:04:01,526 INFO L495 AbstractCegarLoop]: Abstraction has 1855 states and 2203 transitions. [2023-12-02 13:04:01,526 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 13:04:01,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 2203 transitions. [2023-12-02 13:04:01,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-02 13:04:01,529 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:04:01,529 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 13:04:01,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 13:04:01,529 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:04:01,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:04:01,530 INFO L85 PathProgramCache]: Analyzing trace with hash 945596385, now seen corresponding path program 1 times [2023-12-02 13:04:01,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:04:01,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644042192] [2023-12-02 13:04:01,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:01,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:04:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:01,822 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 13:04:01,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:04:01,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644042192] [2023-12-02 13:04:01,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644042192] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:04:01,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:04:01,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 13:04:01,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917743275] [2023-12-02 13:04:01,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:04:01,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:04:01,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:04:01,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:04:01,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:04:01,824 INFO L87 Difference]: Start difference. First operand 1855 states and 2203 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 13:04:02,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:04:02,487 INFO L93 Difference]: Finished difference Result 2404 states and 2992 transitions. [2023-12-02 13:04:02,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 13:04:02,487 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 68 [2023-12-02 13:04:02,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:04:02,500 INFO L225 Difference]: With dead ends: 2404 [2023-12-02 13:04:02,500 INFO L226 Difference]: Without dead ends: 2065 [2023-12-02 13:04:02,502 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 13:04:02,503 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 323 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:04:02,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 524 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:04:02,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2065 states. [2023-12-02 13:04:02,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2065 to 2043. [2023-12-02 13:04:02,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2043 states, 1432 states have (on average 1.2053072625698324) internal successors, (1726), 1445 states have internal predecessors, (1726), 346 states have call successors, (346), 273 states have call predecessors, (346), 263 states have return successors, (392), 326 states have call predecessors, (392), 343 states have call successors, (392) [2023-12-02 13:04:02,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2043 states to 2043 states and 2464 transitions. [2023-12-02 13:04:02,870 INFO L78 Accepts]: Start accepts. Automaton has 2043 states and 2464 transitions. Word has length 68 [2023-12-02 13:04:02,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:04:02,871 INFO L495 AbstractCegarLoop]: Abstraction has 2043 states and 2464 transitions. [2023-12-02 13:04:02,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 13:04:02,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2043 states and 2464 transitions. [2023-12-02 13:04:02,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-02 13:04:02,874 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:04:02,874 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:04:02,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 13:04:02,874 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:04:02,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:04:02,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1804733308, now seen corresponding path program 1 times [2023-12-02 13:04:02,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:04:02,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547507376] [2023-12-02 13:04:02,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:02,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:04:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:03,148 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 13:04:03,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:04:03,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547507376] [2023-12-02 13:04:03,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547507376] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:04:03,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:04:03,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 13:04:03,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259791601] [2023-12-02 13:04:03,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:04:03,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:04:03,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:04:03,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:04:03,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:04:03,150 INFO L87 Difference]: Start difference. First operand 2043 states and 2464 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 13:04:03,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:04:03,774 INFO L93 Difference]: Finished difference Result 3089 states and 3960 transitions. [2023-12-02 13:04:03,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 13:04:03,775 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 70 [2023-12-02 13:04:03,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:04:03,787 INFO L225 Difference]: With dead ends: 3089 [2023-12-02 13:04:03,787 INFO L226 Difference]: Without dead ends: 2562 [2023-12-02 13:04:03,789 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 13:04:03,790 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 331 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:04:03,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 468 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:04:03,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2023-12-02 13:04:04,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 2518. [2023-12-02 13:04:04,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2518 states, 1777 states have (on average 1.2234102419808666) internal successors, (2174), 1795 states have internal predecessors, (2174), 428 states have call successors, (428), 321 states have call predecessors, (428), 311 states have return successors, (504), 403 states have call predecessors, (504), 425 states have call successors, (504) [2023-12-02 13:04:04,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2518 states to 2518 states and 3106 transitions. [2023-12-02 13:04:04,267 INFO L78 Accepts]: Start accepts. Automaton has 2518 states and 3106 transitions. Word has length 70 [2023-12-02 13:04:04,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:04:04,267 INFO L495 AbstractCegarLoop]: Abstraction has 2518 states and 3106 transitions. [2023-12-02 13:04:04,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 13:04:04,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2518 states and 3106 transitions. [2023-12-02 13:04:04,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-02 13:04:04,271 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:04:04,272 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 13:04:04,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 13:04:04,272 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:04:04,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:04:04,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1202800530, now seen corresponding path program 1 times [2023-12-02 13:04:04,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:04:04,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571578534] [2023-12-02 13:04:04,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:04,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:04:04,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:04,334 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 13:04:04,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:04:04,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571578534] [2023-12-02 13:04:04,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571578534] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:04:04,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:04:04,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:04:04,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082051630] [2023-12-02 13:04:04,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:04:04,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:04:04,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:04:04,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:04:04,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:04:04,336 INFO L87 Difference]: Start difference. First operand 2518 states and 3106 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 13:04:04,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:04:04,773 INFO L93 Difference]: Finished difference Result 4115 states and 4934 transitions. [2023-12-02 13:04:04,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:04:04,773 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 13:04:04,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:04:04,790 INFO L225 Difference]: With dead ends: 4115 [2023-12-02 13:04:04,790 INFO L226 Difference]: Without dead ends: 2736 [2023-12-02 13:04:04,793 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 13:04:04,794 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 38 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:04:04,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 373 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:04:04,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2023-12-02 13:04:05,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2655. [2023-12-02 13:04:05,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2655 states, 1874 states have (on average 1.2198505869797225) internal successors, (2286), 1898 states have internal predecessors, (2286), 449 states have call successors, (449), 342 states have call predecessors, (449), 330 states have return successors, (531), 416 states have call predecessors, (531), 446 states have call successors, (531) [2023-12-02 13:04:05,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2655 states to 2655 states and 3266 transitions. [2023-12-02 13:04:05,268 INFO L78 Accepts]: Start accepts. Automaton has 2655 states and 3266 transitions. Word has length 71 [2023-12-02 13:04:05,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:04:05,269 INFO L495 AbstractCegarLoop]: Abstraction has 2655 states and 3266 transitions. [2023-12-02 13:04:05,269 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 13:04:05,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2655 states and 3266 transitions. [2023-12-02 13:04:05,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 13:04:05,273 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:04:05,273 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:04:05,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 13:04:05,273 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:04:05,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:04:05,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1646975327, now seen corresponding path program 1 times [2023-12-02 13:04:05,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:04:05,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275238519] [2023-12-02 13:04:05,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:05,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:04:05,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 13:04:05,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:04:05,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275238519] [2023-12-02 13:04:05,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275238519] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:04:05,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:04:05,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:04:05,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697864874] [2023-12-02 13:04:05,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:04:05,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:04:05,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:04:05,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:04:05,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:04:05,337 INFO L87 Difference]: Start difference. First operand 2655 states and 3266 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 13:04:05,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:04:05,810 INFO L93 Difference]: Finished difference Result 3748 states and 4803 transitions. [2023-12-02 13:04:05,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:04:05,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 72 [2023-12-02 13:04:05,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:04:05,827 INFO L225 Difference]: With dead ends: 3748 [2023-12-02 13:04:05,828 INFO L226 Difference]: Without dead ends: 2870 [2023-12-02 13:04:05,832 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 13:04:05,833 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 36 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:04:05,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 384 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:04:05,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2023-12-02 13:04:06,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 2753. [2023-12-02 13:04:06,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 1960 states have (on average 1.226530612244898) internal successors, (2404), 1984 states have internal predecessors, (2404), 455 states have call successors, (455), 348 states have call predecessors, (455), 336 states have return successors, (537), 422 states have call predecessors, (537), 452 states have call successors, (537) [2023-12-02 13:04:06,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 3396 transitions. [2023-12-02 13:04:06,292 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 3396 transitions. Word has length 72 [2023-12-02 13:04:06,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:04:06,292 INFO L495 AbstractCegarLoop]: Abstraction has 2753 states and 3396 transitions. [2023-12-02 13:04:06,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 13:04:06,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 3396 transitions. [2023-12-02 13:04:06,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-12-02 13:04:06,299 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:04:06,299 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:04:06,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 13:04:06,300 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:04:06,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:04:06,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1919711292, now seen corresponding path program 1 times [2023-12-02 13:04:06,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:04:06,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349749909] [2023-12-02 13:04:06,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:06,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:04:06,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 13:04:06,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:04:06,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349749909] [2023-12-02 13:04:06,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349749909] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:04:06,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:04:06,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:04:06,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222704235] [2023-12-02 13:04:06,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:04:06,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:04:06,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:04:06,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:04:06,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:04:06,362 INFO L87 Difference]: Start difference. First operand 2753 states and 3396 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 13:04:06,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:04:06,813 INFO L93 Difference]: Finished difference Result 4401 states and 5712 transitions. [2023-12-02 13:04:06,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:04:06,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 91 [2023-12-02 13:04:06,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:04:06,832 INFO L225 Difference]: With dead ends: 4401 [2023-12-02 13:04:06,832 INFO L226 Difference]: Without dead ends: 3300 [2023-12-02 13:04:06,835 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 13:04:06,836 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 169 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:04:06,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 270 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:04:06,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3300 states. [2023-12-02 13:04:07,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3300 to 3285. [2023-12-02 13:04:07,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3285 states, 2356 states have (on average 1.234295415959253) internal successors, (2908), 2385 states have internal predecessors, (2908), 540 states have call successors, (540), 399 states have call predecessors, (540), 387 states have return successors, (652), 502 states have call predecessors, (652), 537 states have call successors, (652) [2023-12-02 13:04:07,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3285 states to 3285 states and 4100 transitions. [2023-12-02 13:04:07,216 INFO L78 Accepts]: Start accepts. Automaton has 3285 states and 4100 transitions. Word has length 91 [2023-12-02 13:04:07,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:04:07,217 INFO L495 AbstractCegarLoop]: Abstraction has 3285 states and 4100 transitions. [2023-12-02 13:04:07,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 13:04:07,217 INFO L276 IsEmpty]: Start isEmpty. Operand 3285 states and 4100 transitions. [2023-12-02 13:04:07,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-02 13:04:07,223 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:04:07,224 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 13:04:07,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-02 13:04:07,224 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:04:07,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:04:07,224 INFO L85 PathProgramCache]: Analyzing trace with hash -918586966, now seen corresponding path program 1 times [2023-12-02 13:04:07,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:04:07,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257993622] [2023-12-02 13:04:07,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:07,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:04:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:07,585 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 13:04:07,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:04:07,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257993622] [2023-12-02 13:04:07,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257993622] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:04:07,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951251601] [2023-12-02 13:04:07,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:07,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:04:07,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:04:07,587 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:04:07,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 13:04:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:07,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 13:04:07,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:04:07,762 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 13:04:07,762 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:04:07,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951251601] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:04:07,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:04:07,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2023-12-02 13:04:07,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260381233] [2023-12-02 13:04:07,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:04:07,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:04:07,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:04:07,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:04:07,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-12-02 13:04:07,764 INFO L87 Difference]: Start difference. First operand 3285 states and 4100 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 13:04:08,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:04:08,316 INFO L93 Difference]: Finished difference Result 4685 states and 5756 transitions. [2023-12-02 13:04:08,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:04:08,317 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 13:04:08,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:04:08,336 INFO L225 Difference]: With dead ends: 4685 [2023-12-02 13:04:08,337 INFO L226 Difference]: Without dead ends: 3066 [2023-12-02 13:04:08,342 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 13:04:08,343 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 175 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:04:08,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 875 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:04:08,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3066 states. [2023-12-02 13:04:08,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3066 to 2778. [2023-12-02 13:04:08,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2778 states, 2040 states have (on average 1.2504901960784314) internal successors, (2551), 2067 states have internal predecessors, (2551), 436 states have call successors, (436), 308 states have call predecessors, (436), 300 states have return successors, (542), 404 states have call predecessors, (542), 433 states have call successors, (542) [2023-12-02 13:04:08,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2778 states to 2778 states and 3529 transitions. [2023-12-02 13:04:08,696 INFO L78 Accepts]: Start accepts. Automaton has 2778 states and 3529 transitions. Word has length 102 [2023-12-02 13:04:08,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:04:08,697 INFO L495 AbstractCegarLoop]: Abstraction has 2778 states and 3529 transitions. [2023-12-02 13:04:08,697 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 13:04:08,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2778 states and 3529 transitions. [2023-12-02 13:04:08,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-12-02 13:04:08,705 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:04:08,706 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:04:08,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 13:04:08,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 13:04:08,906 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:04:08,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:04:08,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1825943802, now seen corresponding path program 1 times [2023-12-02 13:04:08,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:04:08,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100926059] [2023-12-02 13:04:08,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:08,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:04:08,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-02 13:04:09,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:04:09,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100926059] [2023-12-02 13:04:09,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100926059] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:04:09,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868900151] [2023-12-02 13:04:09,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:09,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:04:09,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:04:09,013 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:04:09,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 13:04:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:09,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:04:09,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:04:09,207 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 13:04:09,208 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:04:09,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868900151] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:04:09,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:04:09,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 13:04:09,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615486891] [2023-12-02 13:04:09,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:04:09,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:04:09,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:04:09,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:04:09,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:04:09,210 INFO L87 Difference]: Start difference. First operand 2778 states and 3529 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 13:04:09,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:04:09,572 INFO L93 Difference]: Finished difference Result 4323 states and 5670 transitions. [2023-12-02 13:04:09,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:04:09,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 106 [2023-12-02 13:04:09,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:04:09,584 INFO L225 Difference]: With dead ends: 4323 [2023-12-02 13:04:09,584 INFO L226 Difference]: Without dead ends: 3119 [2023-12-02 13:04:09,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 106 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 13:04:09,603 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 167 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:04:09,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 199 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:04:09,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3119 states. [2023-12-02 13:04:09,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3119 to 3063. [2023-12-02 13:04:09,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 2287 states have (on average 1.25010931351115) internal successors, (2859), 2311 states have internal predecessors, (2859), 442 states have call successors, (442), 338 states have call predecessors, (442), 332 states have return successors, (547), 415 states have call predecessors, (547), 439 states have call successors, (547) [2023-12-02 13:04:09,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 3848 transitions. [2023-12-02 13:04:09,948 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 3848 transitions. Word has length 106 [2023-12-02 13:04:09,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:04:09,948 INFO L495 AbstractCegarLoop]: Abstraction has 3063 states and 3848 transitions. [2023-12-02 13:04:09,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 13:04:09,949 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 3848 transitions. [2023-12-02 13:04:09,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-12-02 13:04:09,957 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:04:09,958 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:04:09,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 13:04:10,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 13:04:10,160 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:04:10,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:04:10,161 INFO L85 PathProgramCache]: Analyzing trace with hash -231660229, now seen corresponding path program 1 times [2023-12-02 13:04:10,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:04:10,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589509164] [2023-12-02 13:04:10,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:10,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:04:10,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 13:04:10,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:04:10,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589509164] [2023-12-02 13:04:10,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589509164] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:04:10,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692687204] [2023-12-02 13:04:10,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:10,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:04:10,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:04:10,260 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:04:10,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 13:04:10,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:10,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:04:10,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:04:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 13:04:10,424 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:04:10,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692687204] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:04:10,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:04:10,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 13:04:10,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488604602] [2023-12-02 13:04:10,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:04:10,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:04:10,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:04:10,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:04:10,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:04:10,426 INFO L87 Difference]: Start difference. First operand 3063 states and 3848 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 13:04:10,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:04:10,909 INFO L93 Difference]: Finished difference Result 4816 states and 6234 transitions. [2023-12-02 13:04:10,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:04:10,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 106 [2023-12-02 13:04:10,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:04:10,920 INFO L225 Difference]: With dead ends: 4816 [2023-12-02 13:04:10,921 INFO L226 Difference]: Without dead ends: 3516 [2023-12-02 13:04:10,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:04:10,924 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 61 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:04:10,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 395 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:04:10,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3516 states. [2023-12-02 13:04:11,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3516 to 3210. [2023-12-02 13:04:11,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3210 states, 2412 states have (on average 1.257462686567164) internal successors, (3033), 2436 states have internal predecessors, (3033), 453 states have call successors, (453), 349 states have call predecessors, (453), 343 states have return successors, (558), 426 states have call predecessors, (558), 450 states have call successors, (558) [2023-12-02 13:04:11,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3210 states to 3210 states and 4044 transitions. [2023-12-02 13:04:11,232 INFO L78 Accepts]: Start accepts. Automaton has 3210 states and 4044 transitions. Word has length 106 [2023-12-02 13:04:11,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:04:11,232 INFO L495 AbstractCegarLoop]: Abstraction has 3210 states and 4044 transitions. [2023-12-02 13:04:11,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 13:04:11,232 INFO L276 IsEmpty]: Start isEmpty. Operand 3210 states and 4044 transitions. [2023-12-02 13:04:11,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-12-02 13:04:11,237 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:04:11,237 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:04:11,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-02 13:04:11,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:04:11,438 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:04:11,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:04:11,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1783264900, now seen corresponding path program 2 times [2023-12-02 13:04:11,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:04:11,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829893616] [2023-12-02 13:04:11,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:11,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:04:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 13:04:11,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:04:11,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829893616] [2023-12-02 13:04:11,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829893616] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:04:11,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982288843] [2023-12-02 13:04:11,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:04:11,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:04:11,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:04:11,629 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:04:11,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 13:04:11,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 13:04:11,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:04:11,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 13:04:11,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:04:11,784 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 13:04:11,784 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:04:11,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982288843] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:04:11,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:04:11,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-12-02 13:04:11,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524409501] [2023-12-02 13:04:11,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:04:11,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:04:11,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:04:11,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:04:11,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:04:11,786 INFO L87 Difference]: Start difference. First operand 3210 states and 4044 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 13:04:12,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:04:12,451 INFO L93 Difference]: Finished difference Result 4857 states and 6212 transitions. [2023-12-02 13:04:12,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:04:12,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 106 [2023-12-02 13:04:12,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:04:12,460 INFO L225 Difference]: With dead ends: 4857 [2023-12-02 13:04:12,460 INFO L226 Difference]: Without dead ends: 3343 [2023-12-02 13:04:12,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-02 13:04:12,465 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 176 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:04:12,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 551 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:04:12,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3343 states. [2023-12-02 13:04:12,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3343 to 3295. [2023-12-02 13:04:12,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3295 states, 2472 states have (on average 1.2552588996763754) internal successors, (3103), 2502 states have internal predecessors, (3103), 461 states have call successors, (461), 354 states have call predecessors, (461), 360 states have return successors, (584), 440 states have call predecessors, (584), 458 states have call successors, (584) [2023-12-02 13:04:12,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3295 states to 3295 states and 4148 transitions. [2023-12-02 13:04:12,926 INFO L78 Accepts]: Start accepts. Automaton has 3295 states and 4148 transitions. Word has length 106 [2023-12-02 13:04:12,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:04:12,927 INFO L495 AbstractCegarLoop]: Abstraction has 3295 states and 4148 transitions. [2023-12-02 13:04:12,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 13:04:12,927 INFO L276 IsEmpty]: Start isEmpty. Operand 3295 states and 4148 transitions. [2023-12-02 13:04:12,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-12-02 13:04:12,935 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:04:12,935 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:04:12,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-02 13:04:13,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:04:13,136 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:04:13,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:04:13,136 INFO L85 PathProgramCache]: Analyzing trace with hash -350430181, now seen corresponding path program 2 times [2023-12-02 13:04:13,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:04:13,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627239934] [2023-12-02 13:04:13,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:13,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:04:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:13,311 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 13:04:13,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:04:13,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627239934] [2023-12-02 13:04:13,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627239934] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:04:13,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903678481] [2023-12-02 13:04:13,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:04:13,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:04:13,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:04:13,313 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:04:13,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 13:04:13,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 13:04:13,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:04:13,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:04:13,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:04:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 13:04:13,451 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:04:13,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903678481] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:04:13,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:04:13,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 13:04:13,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517805754] [2023-12-02 13:04:13,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:04:13,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:04:13,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:04:13,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:04:13,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:04:13,453 INFO L87 Difference]: Start difference. First operand 3295 states and 4148 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 13:04:13,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:04:13,905 INFO L93 Difference]: Finished difference Result 4786 states and 6307 transitions. [2023-12-02 13:04:13,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:04:13,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 106 [2023-12-02 13:04:13,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:04:13,913 INFO L225 Difference]: With dead ends: 4786 [2023-12-02 13:04:13,913 INFO L226 Difference]: Without dead ends: 3307 [2023-12-02 13:04:13,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:04:13,917 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 93 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:04:13,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 388 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:04:13,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3307 states. [2023-12-02 13:04:14,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3307 to 3289. [2023-12-02 13:04:14,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3289 states, 2466 states have (on average 1.2331711273317112) internal successors, (3041), 2496 states have internal predecessors, (3041), 461 states have call successors, (461), 354 states have call predecessors, (461), 360 states have return successors, (584), 440 states have call predecessors, (584), 458 states have call successors, (584) [2023-12-02 13:04:14,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3289 states to 3289 states and 4086 transitions. [2023-12-02 13:04:14,281 INFO L78 Accepts]: Start accepts. Automaton has 3289 states and 4086 transitions. Word has length 106 [2023-12-02 13:04:14,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:04:14,281 INFO L495 AbstractCegarLoop]: Abstraction has 3289 states and 4086 transitions. [2023-12-02 13:04:14,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 13:04:14,282 INFO L276 IsEmpty]: Start isEmpty. Operand 3289 states and 4086 transitions. [2023-12-02 13:04:14,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-12-02 13:04:14,287 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:04:14,287 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:04:14,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-02 13:04:14,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:04:14,488 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:04:14,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:04:14,489 INFO L85 PathProgramCache]: Analyzing trace with hash 636434171, now seen corresponding path program 1 times [2023-12-02 13:04:14,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:04:14,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136173306] [2023-12-02 13:04:14,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:14,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:04:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:14,642 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 13:04:14,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:04:14,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136173306] [2023-12-02 13:04:14,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136173306] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:04:14,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61659562] [2023-12-02 13:04:14,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:14,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:04:14,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:04:14,644 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:04:14,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 13:04:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:14,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:04:14,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:04:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 13:04:14,814 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:04:14,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61659562] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:04:14,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:04:14,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 13:04:14,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299361463] [2023-12-02 13:04:14,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:04:14,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:04:14,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:04:14,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:04:14,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:04:14,817 INFO L87 Difference]: Start difference. First operand 3289 states and 4086 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 13:04:15,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:04:15,282 INFO L93 Difference]: Finished difference Result 5282 states and 6819 transitions. [2023-12-02 13:04:15,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:04:15,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 106 [2023-12-02 13:04:15,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:04:15,292 INFO L225 Difference]: With dead ends: 5282 [2023-12-02 13:04:15,292 INFO L226 Difference]: Without dead ends: 3726 [2023-12-02 13:04:15,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:04:15,297 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 84 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:04:15,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 393 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:04:15,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3726 states. [2023-12-02 13:04:15,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3726 to 3662. [2023-12-02 13:04:15,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3662 states, 2765 states have (on average 1.2285714285714286) internal successors, (3397), 2798 states have internal predecessors, (3397), 504 states have call successors, (504), 387 states have call predecessors, (504), 391 states have return successors, (662), 478 states have call predecessors, (662), 501 states have call successors, (662) [2023-12-02 13:04:15,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3662 states to 3662 states and 4563 transitions. [2023-12-02 13:04:15,688 INFO L78 Accepts]: Start accepts. Automaton has 3662 states and 4563 transitions. Word has length 106 [2023-12-02 13:04:15,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:04:15,688 INFO L495 AbstractCegarLoop]: Abstraction has 3662 states and 4563 transitions. [2023-12-02 13:04:15,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 13:04:15,689 INFO L276 IsEmpty]: Start isEmpty. Operand 3662 states and 4563 transitions. [2023-12-02 13:04:15,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-12-02 13:04:15,693 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:04:15,693 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:04:15,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 13:04:15,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:04:15,895 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:04:15,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:04:15,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1378513573, now seen corresponding path program 1 times [2023-12-02 13:04:15,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:04:15,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848758062] [2023-12-02 13:04:15,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:15,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:04:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 13:04:16,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:04:16,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848758062] [2023-12-02 13:04:16,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848758062] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:04:16,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282539669] [2023-12-02 13:04:16,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:16,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:04:16,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:04:16,077 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:04:16,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 13:04:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:16,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:04:16,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:04:16,237 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 13:04:16,237 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:04:16,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282539669] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:04:16,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:04:16,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 13:04:16,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311449769] [2023-12-02 13:04:16,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:04:16,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:04:16,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:04:16,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:04:16,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:04:16,240 INFO L87 Difference]: Start difference. First operand 3662 states and 4563 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 13:04:16,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:04:16,642 INFO L93 Difference]: Finished difference Result 4741 states and 5990 transitions. [2023-12-02 13:04:16,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:04:16,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 108 [2023-12-02 13:04:16,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:04:16,654 INFO L225 Difference]: With dead ends: 4741 [2023-12-02 13:04:16,654 INFO L226 Difference]: Without dead ends: 3595 [2023-12-02 13:04:16,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:04:16,660 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 16 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:04:16,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 348 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:04:16,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3595 states. [2023-12-02 13:04:17,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3595 to 3595. [2023-12-02 13:04:17,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3595 states, 2710 states have (on average 1.2273062730627307) internal successors, (3326), 2740 states have internal predecessors, (3326), 504 states have call successors, (504), 387 states have call predecessors, (504), 379 states have return successors, (644), 469 states have call predecessors, (644), 501 states have call successors, (644) [2023-12-02 13:04:17,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3595 states to 3595 states and 4474 transitions. [2023-12-02 13:04:17,341 INFO L78 Accepts]: Start accepts. Automaton has 3595 states and 4474 transitions. Word has length 108 [2023-12-02 13:04:17,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:04:17,341 INFO L495 AbstractCegarLoop]: Abstraction has 3595 states and 4474 transitions. [2023-12-02 13:04:17,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 13:04:17,342 INFO L276 IsEmpty]: Start isEmpty. Operand 3595 states and 4474 transitions. [2023-12-02 13:04:17,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-02 13:04:17,347 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:04:17,347 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:04:17,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 13:04:17,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-02 13:04:17,548 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:04:17,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:04:17,548 INFO L85 PathProgramCache]: Analyzing trace with hash -701311050, now seen corresponding path program 1 times [2023-12-02 13:04:17,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:04:17,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047044359] [2023-12-02 13:04:17,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:17,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:04:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:17,741 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-02 13:04:17,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:04:17,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047044359] [2023-12-02 13:04:17,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047044359] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:04:17,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315926890] [2023-12-02 13:04:17,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:17,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:04:17,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:04:17,743 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:04:17,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 13:04:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:17,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:04:17,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:04:17,914 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 13:04:17,914 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:04:17,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315926890] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:04:17,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:04:17,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 13:04:17,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268014594] [2023-12-02 13:04:17,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:04:17,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:04:17,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:04:17,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:04:17,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:04:17,917 INFO L87 Difference]: Start difference. First operand 3595 states and 4474 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 13:04:18,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:04:18,421 INFO L93 Difference]: Finished difference Result 6917 states and 8795 transitions. [2023-12-02 13:04:18,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:04:18,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 109 [2023-12-02 13:04:18,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:04:18,433 INFO L225 Difference]: With dead ends: 6917 [2023-12-02 13:04:18,433 INFO L226 Difference]: Without dead ends: 4507 [2023-12-02 13:04:18,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:04:18,438 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 49 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:04:18,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 342 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:04:18,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4507 states. [2023-12-02 13:04:18,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4507 to 3870. [2023-12-02 13:04:18,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3870 states, 2943 states have (on average 1.2320761128100577) internal successors, (3626), 2974 states have internal predecessors, (3626), 525 states have call successors, (525), 408 states have call predecessors, (525), 400 states have return successors, (665), 489 states have call predecessors, (665), 522 states have call successors, (665) [2023-12-02 13:04:18,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 4816 transitions. [2023-12-02 13:04:18,840 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 4816 transitions. Word has length 109 [2023-12-02 13:04:18,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:04:18,840 INFO L495 AbstractCegarLoop]: Abstraction has 3870 states and 4816 transitions. [2023-12-02 13:04:18,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 13:04:18,841 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 4816 transitions. [2023-12-02 13:04:18,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-12-02 13:04:18,845 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:04:18,845 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:04:18,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-02 13:04:19,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-02 13:04:19,046 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:04:19,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:04:19,046 INFO L85 PathProgramCache]: Analyzing trace with hash 530459455, now seen corresponding path program 1 times [2023-12-02 13:04:19,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:04:19,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374546221] [2023-12-02 13:04:19,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:19,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:04:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 26 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 13:04:19,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:04:19,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374546221] [2023-12-02 13:04:19,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374546221] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:04:19,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998223888] [2023-12-02 13:04:19,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:19,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:04:19,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:04:19,184 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:04:19,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 13:04:19,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:19,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 13:04:19,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:04:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 13:04:19,370 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:04:19,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998223888] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:04:19,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:04:19,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2023-12-02 13:04:19,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764962273] [2023-12-02 13:04:19,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:04:19,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:04:19,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:04:19,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:04:19,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:04:19,372 INFO L87 Difference]: Start difference. First operand 3870 states and 4816 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 13:04:19,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:04:19,815 INFO L93 Difference]: Finished difference Result 6119 states and 7859 transitions. [2023-12-02 13:04:19,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:04:19,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 111 [2023-12-02 13:04:19,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:04:19,823 INFO L225 Difference]: With dead ends: 6119 [2023-12-02 13:04:19,823 INFO L226 Difference]: Without dead ends: 4252 [2023-12-02 13:04:19,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 113 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 13:04:19,827 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 159 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:04:19,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 214 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:04:19,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4252 states. [2023-12-02 13:04:20,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4252 to 4208. [2023-12-02 13:04:20,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4208 states, 3249 states have (on average 1.2157586949830717) internal successors, (3950), 3280 states have internal predecessors, (3950), 527 states have call successors, (527), 438 states have call predecessors, (527), 430 states have return successors, (713), 491 states have call predecessors, (713), 524 states have call successors, (713) [2023-12-02 13:04:20,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4208 states to 4208 states and 5190 transitions. [2023-12-02 13:04:20,286 INFO L78 Accepts]: Start accepts. Automaton has 4208 states and 5190 transitions. Word has length 111 [2023-12-02 13:04:20,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:04:20,286 INFO L495 AbstractCegarLoop]: Abstraction has 4208 states and 5190 transitions. [2023-12-02 13:04:20,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 13:04:20,286 INFO L276 IsEmpty]: Start isEmpty. Operand 4208 states and 5190 transitions. [2023-12-02 13:04:20,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-02 13:04:20,291 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:04:20,291 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 13:04:20,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 13:04:20,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-02 13:04:20,492 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:04:20,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:04:20,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1820342989, now seen corresponding path program 1 times [2023-12-02 13:04:20,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:04:20,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141640568] [2023-12-02 13:04:20,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:20,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:04:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:20,641 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 13:04:20,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:04:20,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141640568] [2023-12-02 13:04:20,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141640568] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:04:20,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422947333] [2023-12-02 13:04:20,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:20,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:04:20,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:04:20,643 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:04:20,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 13:04:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:20,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 13:04:20,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:04:20,849 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 13:04:20,849 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:04:20,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422947333] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:04:20,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:04:20,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-12-02 13:04:20,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238933035] [2023-12-02 13:04:20,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:04:20,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:04:20,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:04:20,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:04:20,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-12-02 13:04:20,852 INFO L87 Difference]: Start difference. First operand 4208 states and 5190 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 13:04:21,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:04:21,532 INFO L93 Difference]: Finished difference Result 4994 states and 6085 transitions. [2023-12-02 13:04:21,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 13:04:21,533 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 13:04:21,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:04:21,539 INFO L225 Difference]: With dead ends: 4994 [2023-12-02 13:04:21,539 INFO L226 Difference]: Without dead ends: 3936 [2023-12-02 13:04:21,542 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 13:04:21,542 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 63 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:04:21,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 1176 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:04:21,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3936 states. [2023-12-02 13:04:21,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3936 to 3818. [2023-12-02 13:04:21,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3818 states, 2969 states have (on average 1.219602559784439) internal successors, (3621), 2994 states have internal predecessors, (3621), 468 states have call successors, (468), 383 states have call predecessors, (468), 379 states have return successors, (644), 442 states have call predecessors, (644), 465 states have call successors, (644) [2023-12-02 13:04:21,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3818 states to 3818 states and 4733 transitions. [2023-12-02 13:04:21,922 INFO L78 Accepts]: Start accepts. Automaton has 3818 states and 4733 transitions. Word has length 112 [2023-12-02 13:04:21,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:04:21,922 INFO L495 AbstractCegarLoop]: Abstraction has 3818 states and 4733 transitions. [2023-12-02 13:04:21,923 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 13:04:21,923 INFO L276 IsEmpty]: Start isEmpty. Operand 3818 states and 4733 transitions. [2023-12-02 13:04:21,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-12-02 13:04:21,927 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:04:21,927 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:04:21,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-02 13:04:22,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-02 13:04:22,128 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:04:22,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:04:22,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1127049777, now seen corresponding path program 1 times [2023-12-02 13:04:22,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:04:22,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556234239] [2023-12-02 13:04:22,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:22,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:04:22,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-02 13:04:22,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:04:22,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556234239] [2023-12-02 13:04:22,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556234239] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:04:22,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778220660] [2023-12-02 13:04:22,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:22,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:04:22,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:04:22,217 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:04:22,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 13:04:22,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:22,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:04:22,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:04:22,366 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 13:04:22,366 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:04:22,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778220660] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:04:22,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:04:22,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 13:04:22,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126139692] [2023-12-02 13:04:22,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:04:22,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:04:22,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:04:22,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:04:22,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:04:22,369 INFO L87 Difference]: Start difference. First operand 3818 states and 4733 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 13:04:22,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:04:22,884 INFO L93 Difference]: Finished difference Result 5556 states and 6910 transitions. [2023-12-02 13:04:22,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:04:22,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 107 [2023-12-02 13:04:22,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:04:22,892 INFO L225 Difference]: With dead ends: 5556 [2023-12-02 13:04:22,892 INFO L226 Difference]: Without dead ends: 4227 [2023-12-02 13:04:22,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:04:22,896 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 49 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:04:22,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 387 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:04:22,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4227 states. [2023-12-02 13:04:23,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4227 to 4006. [2023-12-02 13:04:23,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4006 states, 3125 states have (on average 1.22272) internal successors, (3821), 3150 states have internal predecessors, (3821), 484 states have call successors, (484), 399 states have call predecessors, (484), 395 states have return successors, (660), 458 states have call predecessors, (660), 481 states have call successors, (660) [2023-12-02 13:04:23,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4006 states to 4006 states and 4965 transitions. [2023-12-02 13:04:23,277 INFO L78 Accepts]: Start accepts. Automaton has 4006 states and 4965 transitions. Word has length 107 [2023-12-02 13:04:23,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:04:23,277 INFO L495 AbstractCegarLoop]: Abstraction has 4006 states and 4965 transitions. [2023-12-02 13:04:23,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 13:04:23,277 INFO L276 IsEmpty]: Start isEmpty. Operand 4006 states and 4965 transitions. [2023-12-02 13:04:23,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 13:04:23,282 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:04:23,282 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] [2023-12-02 13:04:23,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 13:04:23,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 13:04:23,482 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:04:23,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:04:23,483 INFO L85 PathProgramCache]: Analyzing trace with hash 2066368575, now seen corresponding path program 1 times [2023-12-02 13:04:23,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:04:23,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624331809] [2023-12-02 13:04:23,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:23,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:04:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:23,536 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 13:04:23,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:04:23,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624331809] [2023-12-02 13:04:23,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624331809] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:04:23,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:04:23,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:04:23,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664163121] [2023-12-02 13:04:23,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:04:23,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:04:23,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:04:23,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:04:23,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:04:23,538 INFO L87 Difference]: Start difference. First operand 4006 states and 4965 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-12-02 13:04:24,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:04:24,146 INFO L93 Difference]: Finished difference Result 4499 states and 5523 transitions. [2023-12-02 13:04:24,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:04:24,147 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 113 [2023-12-02 13:04:24,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:04:24,153 INFO L225 Difference]: With dead ends: 4499 [2023-12-02 13:04:24,153 INFO L226 Difference]: Without dead ends: 3873 [2023-12-02 13:04:24,154 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 13:04:24,155 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 228 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:04:24,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 341 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:04:24,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3873 states. [2023-12-02 13:04:24,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3873 to 3826. [2023-12-02 13:04:24,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3826 states, 2997 states have (on average 1.2252252252252251) internal successors, (3672), 3020 states have internal predecessors, (3672), 456 states have call successors, (456), 373 states have call predecessors, (456), 371 states have return successors, (630), 434 states have call predecessors, (630), 453 states have call successors, (630) [2023-12-02 13:04:24,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3826 states to 3826 states and 4758 transitions. [2023-12-02 13:04:24,530 INFO L78 Accepts]: Start accepts. Automaton has 3826 states and 4758 transitions. Word has length 113 [2023-12-02 13:04:24,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:04:24,530 INFO L495 AbstractCegarLoop]: Abstraction has 3826 states and 4758 transitions. [2023-12-02 13:04:24,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-12-02 13:04:24,530 INFO L276 IsEmpty]: Start isEmpty. Operand 3826 states and 4758 transitions. [2023-12-02 13:04:24,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 13:04:24,534 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:04:24,535 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 13:04:24,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-12-02 13:04:24,535 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:04:24,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:04:24,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1271670338, now seen corresponding path program 1 times [2023-12-02 13:04:24,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:04:24,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28890794] [2023-12-02 13:04:24,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:24,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:04:24,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:24,668 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 13:04:24,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:04:24,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28890794] [2023-12-02 13:04:24,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28890794] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:04:24,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171232196] [2023-12-02 13:04:24,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:24,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:04:24,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:04:24,670 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:04:24,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 13:04:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:24,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 13:04:24,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:04:24,852 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 13:04:24,852 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:04:24,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171232196] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:04:24,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:04:24,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2023-12-02 13:04:24,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065051151] [2023-12-02 13:04:24,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:04:24,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:04:24,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:04:24,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:04:24,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 13:04:24,854 INFO L87 Difference]: Start difference. First operand 3826 states and 4758 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 13:04:25,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:04:25,412 INFO L93 Difference]: Finished difference Result 4575 states and 5603 transitions. [2023-12-02 13:04:25,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 13:04:25,412 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 13:04:25,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:04:25,418 INFO L225 Difference]: With dead ends: 4575 [2023-12-02 13:04:25,419 INFO L226 Difference]: Without dead ends: 4118 [2023-12-02 13:04:25,420 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 13:04:25,421 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 159 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:04:25,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 889 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:04:25,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4118 states. [2023-12-02 13:04:25,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4118 to 4084. [2023-12-02 13:04:25,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4084 states, 3159 states have (on average 1.2193732193732194) internal successors, (3852), 3188 states have internal predecessors, (3852), 504 states have call successors, (504), 415 states have call predecessors, (504), 419 states have return successors, (690), 482 states have call predecessors, (690), 501 states have call successors, (690) [2023-12-02 13:04:25,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4084 states to 4084 states and 5046 transitions. [2023-12-02 13:04:25,826 INFO L78 Accepts]: Start accepts. Automaton has 4084 states and 5046 transitions. Word has length 113 [2023-12-02 13:04:25,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:04:25,826 INFO L495 AbstractCegarLoop]: Abstraction has 4084 states and 5046 transitions. [2023-12-02 13:04:25,826 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 13:04:25,826 INFO L276 IsEmpty]: Start isEmpty. Operand 4084 states and 5046 transitions. [2023-12-02 13:04:25,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-02 13:04:25,831 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:04:25,831 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 13:04:25,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 13:04:26,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-02 13:04:26,032 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:04:26,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:04:26,032 INFO L85 PathProgramCache]: Analyzing trace with hash 790795762, now seen corresponding path program 1 times [2023-12-02 13:04:26,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:04:26,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622599568] [2023-12-02 13:04:26,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:26,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:04:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 13:04:26,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:04:26,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622599568] [2023-12-02 13:04:26,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622599568] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:04:26,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357963162] [2023-12-02 13:04:26,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:26,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:04:26,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:04:26,852 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:04:26,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 13:04:26,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:26,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 59 conjunts are in the unsatisfiable core [2023-12-02 13:04:26,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:04:27,800 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 13:04:27,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:04:29,362 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 13:04:29,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357963162] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:04:29,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [233337609] [2023-12-02 13:04:29,366 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2023-12-02 13:04:29,366 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:04:29,367 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:04:29,367 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:04:29,367 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:04:45,939 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 7 for LOIs [2023-12-02 13:04:45,942 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 13 for LOIs [2023-12-02 13:04:45,943 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2023-12-02 13:04:45,948 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 124 for LOIs [2023-12-02 13:04:46,461 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 125 for LOIs [2023-12-02 13:04:46,963 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 16 for LOIs [2023-12-02 13:04:46,986 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 118 for LOIs [2023-12-02 13:04:47,070 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 129 for LOIs [2023-12-02 13:04:47,173 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:04:54,551 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '239251#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~p_last_write~0))' at error location [2023-12-02 13:04:54,551 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:04:54,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:04:54,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 16] total 49 [2023-12-02 13:04:54,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399383787] [2023-12-02 13:04:54,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:04:54,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-02 13:04:54,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:04:54,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-02 13:04:54,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=797, Invalid=9915, Unknown=0, NotChecked=0, Total=10712 [2023-12-02 13:04:54,558 INFO L87 Difference]: Start difference. First operand 4084 states and 5046 transitions. Second operand has 49 states, 32 states have (on average 6.125) internal successors, (196), 37 states have internal predecessors, (196), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2023-12-02 13:05:09,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:05:09,238 INFO L93 Difference]: Finished difference Result 6751 states and 8276 transitions. [2023-12-02 13:05:09,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 238 states. [2023-12-02 13:05:09,238 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 32 states have (on average 6.125) internal successors, (196), 37 states have internal predecessors, (196), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) Word has length 114 [2023-12-02 13:05:09,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:05:09,247 INFO L225 Difference]: With dead ends: 6751 [2023-12-02 13:05:09,248 INFO L226 Difference]: Without dead ends: 5951 [2023-12-02 13:05:09,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 631 GetRequests, 294 SyntacticMatches, 3 SemanticMatches, 334 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 46681 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=10057, Invalid=102503, Unknown=0, NotChecked=0, Total=112560 [2023-12-02 13:05:09,274 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 3332 mSDsluCounter, 2854 mSDsCounter, 0 mSdLazyCounter, 5474 mSolverCounterSat, 1639 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3333 SdHoareTripleChecker+Valid, 3042 SdHoareTripleChecker+Invalid, 7113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1639 IncrementalHoareTripleChecker+Valid, 5474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:05:09,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3333 Valid, 3042 Invalid, 7113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1639 Valid, 5474 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-12-02 13:05:09,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5951 states. [2023-12-02 13:05:09,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5951 to 4321. [2023-12-02 13:05:09,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4321 states, 3319 states have (on average 1.2163302199457668) internal successors, (4037), 3349 states have internal predecessors, (4037), 541 states have call successors, (541), 445 states have call predecessors, (541), 459 states have return successors, (739), 527 states have call predecessors, (739), 538 states have call successors, (739) [2023-12-02 13:05:09,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4321 states to 4321 states and 5317 transitions. [2023-12-02 13:05:09,823 INFO L78 Accepts]: Start accepts. Automaton has 4321 states and 5317 transitions. Word has length 114 [2023-12-02 13:05:09,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:05:09,823 INFO L495 AbstractCegarLoop]: Abstraction has 4321 states and 5317 transitions. [2023-12-02 13:05:09,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 32 states have (on average 6.125) internal successors, (196), 37 states have internal predecessors, (196), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2023-12-02 13:05:09,823 INFO L276 IsEmpty]: Start isEmpty. Operand 4321 states and 5317 transitions. [2023-12-02 13:05:09,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 13:05:09,828 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:05:09,828 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:05:09,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 13:05:10,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:05:10,028 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:05:10,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:05:10,029 INFO L85 PathProgramCache]: Analyzing trace with hash 455121227, now seen corresponding path program 1 times [2023-12-02 13:05:10,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:05:10,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153417139] [2023-12-02 13:05:10,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:05:10,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:05:10,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:05:10,370 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 13:05:10,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:05:10,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153417139] [2023-12-02 13:05:10,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153417139] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:05:10,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97916438] [2023-12-02 13:05:10,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:05:10,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:05:10,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:05:10,372 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:05:10,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 13:05:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:05:10,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 13:05:10,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:05:10,585 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 13:05:10,585 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:05:10,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97916438] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:05:10,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:05:10,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [13] total 18 [2023-12-02 13:05:10,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305349812] [2023-12-02 13:05:10,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:05:10,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:05:10,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:05:10,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:05:10,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-12-02 13:05:10,587 INFO L87 Difference]: Start difference. First operand 4321 states and 5317 transitions. Second operand has 7 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 13:05:11,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:05:11,411 INFO L93 Difference]: Finished difference Result 7340 states and 9225 transitions. [2023-12-02 13:05:11,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 13:05:11,411 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 113 [2023-12-02 13:05:11,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:05:11,418 INFO L225 Difference]: With dead ends: 7340 [2023-12-02 13:05:11,419 INFO L226 Difference]: Without dead ends: 4476 [2023-12-02 13:05:11,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-12-02 13:05:11,425 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 107 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:05:11,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1265 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:05:11,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4476 states. [2023-12-02 13:05:11,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4476 to 4003. [2023-12-02 13:05:11,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 3069 states have (on average 1.2095144998370806) internal successors, (3712), 3094 states have internal predecessors, (3712), 503 states have call successors, (503), 415 states have call predecessors, (503), 429 states have return successors, (671), 494 states have call predecessors, (671), 500 states have call successors, (671) [2023-12-02 13:05:11,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 4886 transitions. [2023-12-02 13:05:11,965 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 4886 transitions. Word has length 113 [2023-12-02 13:05:11,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:05:11,965 INFO L495 AbstractCegarLoop]: Abstraction has 4003 states and 4886 transitions. [2023-12-02 13:05:11,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 13:05:11,965 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 4886 transitions. [2023-12-02 13:05:11,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-02 13:05:11,968 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:05:11,969 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:05:11,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 13:05:12,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-12-02 13:05:12,169 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:05:12,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:05:12,170 INFO L85 PathProgramCache]: Analyzing trace with hash 436600609, now seen corresponding path program 1 times [2023-12-02 13:05:12,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:05:12,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732823352] [2023-12-02 13:05:12,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:05:12,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:05:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:05:12,257 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 36 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 13:05:12,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:05:12,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732823352] [2023-12-02 13:05:12,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732823352] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:05:12,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41235657] [2023-12-02 13:05:12,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:05:12,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:05:12,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:05:12,259 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:05:12,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 13:05:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:05:12,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 13:05:12,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:05:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 13:05:12,490 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:05:12,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41235657] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:05:12,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:05:12,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2023-12-02 13:05:12,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543793084] [2023-12-02 13:05:12,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:05:12,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:05:12,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:05:12,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:05:12,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:05:12,491 INFO L87 Difference]: Start difference. First operand 4003 states and 4886 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-02 13:05:13,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:05:13,224 INFO L93 Difference]: Finished difference Result 7249 states and 9011 transitions. [2023-12-02 13:05:13,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:05:13,225 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 109 [2023-12-02 13:05:13,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:05:13,232 INFO L225 Difference]: With dead ends: 7249 [2023-12-02 13:05:13,232 INFO L226 Difference]: Without dead ends: 4760 [2023-12-02 13:05:13,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:05:13,238 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 214 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:05:13,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 335 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:05:13,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2023-12-02 13:05:13,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 4369. [2023-12-02 13:05:13,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4369 states, 3393 states have (on average 1.198054818744474) internal successors, (4065), 3425 states have internal predecessors, (4065), 514 states have call successors, (514), 442 states have call predecessors, (514), 460 states have return successors, (693), 502 states have call predecessors, (693), 511 states have call successors, (693) [2023-12-02 13:05:13,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4369 states to 4369 states and 5272 transitions. [2023-12-02 13:05:13,819 INFO L78 Accepts]: Start accepts. Automaton has 4369 states and 5272 transitions. Word has length 109 [2023-12-02 13:05:13,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:05:13,819 INFO L495 AbstractCegarLoop]: Abstraction has 4369 states and 5272 transitions. [2023-12-02 13:05:13,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-02 13:05:13,820 INFO L276 IsEmpty]: Start isEmpty. Operand 4369 states and 5272 transitions. [2023-12-02 13:05:13,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-12-02 13:05:13,824 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:05:13,824 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 13:05:13,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 13:05:14,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-12-02 13:05:14,024 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:05:14,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:05:14,025 INFO L85 PathProgramCache]: Analyzing trace with hash -924744191, now seen corresponding path program 1 times [2023-12-02 13:05:14,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:05:14,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284804325] [2023-12-02 13:05:14,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:05:14,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:05:14,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:05:14,300 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 13:05:14,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:05:14,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284804325] [2023-12-02 13:05:14,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284804325] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:05:14,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850436118] [2023-12-02 13:05:14,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:05:14,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:05:14,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:05:14,302 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:05:14,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 13:05:14,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:05:14,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 13:05:14,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:05:14,500 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 13:05:14,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:05:14,698 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 13:05:14,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850436118] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 13:05:14,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:05:14,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2023-12-02 13:05:14,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278926623] [2023-12-02 13:05:14,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:05:14,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:05:14,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:05:14,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:05:14,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2023-12-02 13:05:14,700 INFO L87 Difference]: Start difference. First operand 4369 states and 5272 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 13:05:15,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:05:15,811 INFO L93 Difference]: Finished difference Result 5697 states and 6825 transitions. [2023-12-02 13:05:15,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 13:05:15,812 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 13:05:15,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:05:15,819 INFO L225 Difference]: With dead ends: 5697 [2023-12-02 13:05:15,819 INFO L226 Difference]: Without dead ends: 4706 [2023-12-02 13:05:15,822 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 13:05:15,823 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 279 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:05:15,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 409 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:05:15,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4706 states. [2023-12-02 13:05:16,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4706 to 4449. [2023-12-02 13:05:16,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4449 states, 3438 states have (on average 1.1972076788830714) internal successors, (4116), 3473 states have internal predecessors, (4116), 533 states have call successors, (533), 451 states have call predecessors, (533), 476 states have return successors, (733), 525 states have call predecessors, (733), 530 states have call successors, (733) [2023-12-02 13:05:16,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4449 states to 4449 states and 5382 transitions. [2023-12-02 13:05:16,442 INFO L78 Accepts]: Start accepts. Automaton has 4449 states and 5382 transitions. Word has length 115 [2023-12-02 13:05:16,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:05:16,443 INFO L495 AbstractCegarLoop]: Abstraction has 4449 states and 5382 transitions. [2023-12-02 13:05:16,443 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 13:05:16,443 INFO L276 IsEmpty]: Start isEmpty. Operand 4449 states and 5382 transitions. [2023-12-02 13:05:16,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-12-02 13:05:16,447 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:05:16,447 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:05:16,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 13:05:16,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-12-02 13:05:16,648 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:05:16,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:05:16,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1052284863, now seen corresponding path program 1 times [2023-12-02 13:05:16,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:05:16,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984322104] [2023-12-02 13:05:16,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:05:16,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:05:16,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:05:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 13:05:16,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:05:16,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984322104] [2023-12-02 13:05:16,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984322104] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:05:16,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:05:16,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 13:05:16,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288145647] [2023-12-02 13:05:16,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:05:16,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:05:16,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:05:16,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:05:16,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:05:16,760 INFO L87 Difference]: Start difference. First operand 4449 states and 5382 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 13:05:17,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:05:17,966 INFO L93 Difference]: Finished difference Result 9250 states and 11338 transitions. [2023-12-02 13:05:17,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 13:05:17,967 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 110 [2023-12-02 13:05:17,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:05:17,975 INFO L225 Difference]: With dead ends: 9250 [2023-12-02 13:05:17,975 INFO L226 Difference]: Without dead ends: 5390 [2023-12-02 13:05:17,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:05:17,983 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 92 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:05:17,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 552 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:05:17,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5390 states. [2023-12-02 13:05:18,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5390 to 5264. [2023-12-02 13:05:18,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5264 states, 4054 states have (on average 1.1869758263443513) internal successors, (4812), 4099 states have internal predecessors, (4812), 639 states have call successors, (639), 537 states have call predecessors, (639), 569 states have return successors, (902), 628 states have call predecessors, (902), 636 states have call successors, (902) [2023-12-02 13:05:18,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5264 states to 5264 states and 6353 transitions. [2023-12-02 13:05:18,723 INFO L78 Accepts]: Start accepts. Automaton has 5264 states and 6353 transitions. Word has length 110 [2023-12-02 13:05:18,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:05:18,723 INFO L495 AbstractCegarLoop]: Abstraction has 5264 states and 6353 transitions. [2023-12-02 13:05:18,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 13:05:18,723 INFO L276 IsEmpty]: Start isEmpty. Operand 5264 states and 6353 transitions. [2023-12-02 13:05:18,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-12-02 13:05:18,727 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:05:18,727 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:05:18,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-12-02 13:05:18,727 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:05:18,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:05:18,728 INFO L85 PathProgramCache]: Analyzing trace with hash 218439173, now seen corresponding path program 1 times [2023-12-02 13:05:18,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:05:18,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318947002] [2023-12-02 13:05:18,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:05:18,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:05:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:05:18,845 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 13:05:18,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:05:18,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318947002] [2023-12-02 13:05:18,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318947002] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:05:18,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147659794] [2023-12-02 13:05:18,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:05:18,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:05:18,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:05:18,846 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:05:18,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 13:05:18,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:05:18,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 13:05:18,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:05:18,995 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:05:18,995 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:05:18,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147659794] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:05:18,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:05:18,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2023-12-02 13:05:18,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334027108] [2023-12-02 13:05:18,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:05:18,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:05:18,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:05:18,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:05:18,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:05:18,997 INFO L87 Difference]: Start difference. First operand 5264 states and 6353 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 13:05:20,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:05:20,228 INFO L93 Difference]: Finished difference Result 9879 states and 12137 transitions. [2023-12-02 13:05:20,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 13:05:20,228 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 110 [2023-12-02 13:05:20,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:05:20,239 INFO L225 Difference]: With dead ends: 9879 [2023-12-02 13:05:20,239 INFO L226 Difference]: Without dead ends: 6615 [2023-12-02 13:05:20,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 13:05:20,246 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 213 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:05:20,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 503 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:05:20,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6615 states. [2023-12-02 13:05:21,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6615 to 6322. [2023-12-02 13:05:21,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6322 states, 4879 states have (on average 1.1838491494158638) internal successors, (5776), 4930 states have internal predecessors, (5776), 770 states have call successors, (770), 642 states have call predecessors, (770), 671 states have return successors, (1136), 750 states have call predecessors, (1136), 767 states have call successors, (1136) [2023-12-02 13:05:21,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6322 states to 6322 states and 7682 transitions. [2023-12-02 13:05:21,115 INFO L78 Accepts]: Start accepts. Automaton has 6322 states and 7682 transitions. Word has length 110 [2023-12-02 13:05:21,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:05:21,115 INFO L495 AbstractCegarLoop]: Abstraction has 6322 states and 7682 transitions. [2023-12-02 13:05:21,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 13:05:21,116 INFO L276 IsEmpty]: Start isEmpty. Operand 6322 states and 7682 transitions. [2023-12-02 13:05:21,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-02 13:05:21,119 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:05:21,119 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:05:21,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-02 13:05:21,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-12-02 13:05:21,320 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:05:21,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:05:21,320 INFO L85 PathProgramCache]: Analyzing trace with hash 483010917, now seen corresponding path program 1 times [2023-12-02 13:05:21,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:05:21,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320250896] [2023-12-02 13:05:21,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:05:21,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:05:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:05:21,636 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 13:05:21,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:05:21,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320250896] [2023-12-02 13:05:21,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320250896] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:05:21,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592313465] [2023-12-02 13:05:21,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:05:21,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:05:21,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:05:21,637 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:05:21,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 13:05:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:05:21,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 13:05:21,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:05:21,861 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 13:05:21,861 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:05:21,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592313465] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:05:21,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:05:21,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2023-12-02 13:05:21,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089157014] [2023-12-02 13:05:21,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:05:21,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 13:05:21,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:05:21,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 13:05:21,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-12-02 13:05:21,863 INFO L87 Difference]: Start difference. First operand 6322 states and 7682 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 13:05:23,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:05:23,037 INFO L93 Difference]: Finished difference Result 9254 states and 11204 transitions. [2023-12-02 13:05:23,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 13:05:23,037 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), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 116 [2023-12-02 13:05:23,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:05:23,047 INFO L225 Difference]: With dead ends: 9254 [2023-12-02 13:05:23,047 INFO L226 Difference]: Without dead ends: 6482 [2023-12-02 13:05:23,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-12-02 13:05:23,051 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 87 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:05:23,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 1274 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:05:23,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6482 states. [2023-12-02 13:05:23,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6482 to 6363. [2023-12-02 13:05:23,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6363 states, 4914 states have (on average 1.1837606837606838) internal successors, (5817), 4965 states have internal predecessors, (5817), 773 states have call successors, (773), 645 states have call predecessors, (773), 674 states have return successors, (1139), 753 states have call predecessors, (1139), 770 states have call successors, (1139) [2023-12-02 13:05:23,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6363 states to 6363 states and 7729 transitions. [2023-12-02 13:05:23,906 INFO L78 Accepts]: Start accepts. Automaton has 6363 states and 7729 transitions. Word has length 116 [2023-12-02 13:05:23,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:05:23,907 INFO L495 AbstractCegarLoop]: Abstraction has 6363 states and 7729 transitions. [2023-12-02 13:05:23,907 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), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 13:05:23,907 INFO L276 IsEmpty]: Start isEmpty. Operand 6363 states and 7729 transitions. [2023-12-02 13:05:23,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-12-02 13:05:23,911 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:05:23,911 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:05:23,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 13:05:24,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-12-02 13:05:24,112 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:05:24,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:05:24,112 INFO L85 PathProgramCache]: Analyzing trace with hash -2015167230, now seen corresponding path program 1 times [2023-12-02 13:05:24,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:05:24,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717759234] [2023-12-02 13:05:24,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:05:24,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:05:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:05:24,595 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 13:05:24,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:05:24,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717759234] [2023-12-02 13:05:24,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717759234] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:05:24,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644010806] [2023-12-02 13:05:24,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:05:24,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:05:24,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:05:24,597 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:05:24,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 13:05:24,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:05:24,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 13:05:24,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:05:25,179 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 63 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 13:05:25,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:05:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 13:05:25,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644010806] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:05:25,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [861423659] [2023-12-02 13:05:25,954 INFO L159 IcfgInterpreter]: Started Sifa with 73 locations of interest [2023-12-02 13:05:25,954 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:05:25,954 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:05:25,955 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:05:25,955 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:05:39,476 INFO L197 IcfgInterpreter]: Interpreting procedure error2 with input of size 30 for LOIs [2023-12-02 13:05:39,479 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 1 for LOIs [2023-12-02 13:05:39,484 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 1 for LOIs [2023-12-02 13:05:39,488 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 1 for LOIs [2023-12-02 13:05:39,489 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 40 for LOIs [2023-12-02 13:05:39,659 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 1 for LOIs [2023-12-02 13:05:39,711 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 120 for LOIs [2023-12-02 13:05:39,781 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:05:55,345 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '357653#(and (not (= ~token~0 (+ 2 ~local~0))) (exists ((|v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_BEFORE_CALL_7| Int)) (and (<= 0 (+ |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_BEFORE_CALL_7| 2147483648)) (not (= |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_BEFORE_CALL_7| 0)) (<= |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_BEFORE_CALL_7| 2147483647))) (= ~m_pc~0 1) (exists ((|v_ULTIMATE.start_eval2_~tmp~5#1_BEFORE_CALL_17| Int)) (and (<= 0 |v_ULTIMATE.start_eval2_~tmp~5#1_BEFORE_CALL_17|) (<= |v_ULTIMATE.start_eval2_~tmp~5#1_BEFORE_CALL_17| 1) (not (= |v_ULTIMATE.start_eval2_~tmp~5#1_BEFORE_CALL_17| 0)))) (= ~m_st~0 1))' at error location [2023-12-02 13:05:55,345 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:05:55,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:05:55,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 14] total 39 [2023-12-02 13:05:55,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400736368] [2023-12-02 13:05:55,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:05:55,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-02 13:05:55,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:05:55,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-02 13:05:55,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=8183, Unknown=0, NotChecked=0, Total=8742 [2023-12-02 13:05:55,348 INFO L87 Difference]: Start difference. First operand 6363 states and 7729 transitions. Second operand has 39 states, 27 states have (on average 7.592592592592593) internal successors, (205), 30 states have internal predecessors, (205), 17 states have call successors, (45), 12 states have call predecessors, (45), 19 states have return successors, (44), 17 states have call predecessors, (44), 17 states have call successors, (44) [2023-12-02 13:06:10,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:06:10,850 INFO L93 Difference]: Finished difference Result 14857 states and 18250 transitions. [2023-12-02 13:06:10,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2023-12-02 13:06:10,850 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 27 states have (on average 7.592592592592593) internal successors, (205), 30 states have internal predecessors, (205), 17 states have call successors, (45), 12 states have call predecessors, (45), 19 states have return successors, (44), 17 states have call predecessors, (44), 17 states have call successors, (44) Word has length 118 [2023-12-02 13:06:10,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:06:10,866 INFO L225 Difference]: With dead ends: 14857 [2023-12-02 13:06:10,866 INFO L226 Difference]: Without dead ends: 9780 [2023-12-02 13:06:10,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30936 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=8617, Invalid=72323, Unknown=0, NotChecked=0, Total=80940 [2023-12-02 13:06:10,879 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 4409 mSDsluCounter, 3458 mSDsCounter, 0 mSdLazyCounter, 6602 mSolverCounterSat, 1975 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4409 SdHoareTripleChecker+Valid, 3705 SdHoareTripleChecker+Invalid, 8577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1975 IncrementalHoareTripleChecker+Valid, 6602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:06:10,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4409 Valid, 3705 Invalid, 8577 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1975 Valid, 6602 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-12-02 13:06:10,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9780 states. [2023-12-02 13:06:11,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9780 to 5742. [2023-12-02 13:06:11,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5742 states, 4341 states have (on average 1.1446671273900022) internal successors, (4969), 4401 states have internal predecessors, (4969), 744 states have call successors, (744), 628 states have call predecessors, (744), 655 states have return successors, (864), 713 states have call predecessors, (864), 741 states have call successors, (864) [2023-12-02 13:06:11,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5742 states to 5742 states and 6577 transitions. [2023-12-02 13:06:11,977 INFO L78 Accepts]: Start accepts. Automaton has 5742 states and 6577 transitions. Word has length 118 [2023-12-02 13:06:11,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:06:11,977 INFO L495 AbstractCegarLoop]: Abstraction has 5742 states and 6577 transitions. [2023-12-02 13:06:11,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 27 states have (on average 7.592592592592593) internal successors, (205), 30 states have internal predecessors, (205), 17 states have call successors, (45), 12 states have call predecessors, (45), 19 states have return successors, (44), 17 states have call predecessors, (44), 17 states have call successors, (44) [2023-12-02 13:06:11,977 INFO L276 IsEmpty]: Start isEmpty. Operand 5742 states and 6577 transitions. [2023-12-02 13:06:11,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-02 13:06:11,980 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:06:11,980 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 13:06:11,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-02 13:06:12,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-12-02 13:06:12,181 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:06:12,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:06:12,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1678632397, now seen corresponding path program 1 times [2023-12-02 13:06:12,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:06:12,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645253854] [2023-12-02 13:06:12,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:06:12,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:06:12,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:06:12,654 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 13:06:12,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:06:12,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645253854] [2023-12-02 13:06:12,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645253854] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:06:12,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098190069] [2023-12-02 13:06:12,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:06:12,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:06:12,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:06:12,656 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:06:12,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 13:06:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:06:12,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 62 conjunts are in the unsatisfiable core [2023-12-02 13:06:12,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:06:13,488 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 13:06:13,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:06:15,014 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 13:06:15,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098190069] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:06:15,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1008891823] [2023-12-02 13:06:15,016 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2023-12-02 13:06:15,017 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:06:15,017 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:06:15,017 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:06:15,017 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:06:22,003 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 7 for LOIs [2023-12-02 13:06:22,005 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 81 for LOIs [2023-12-02 13:06:22,056 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2023-12-02 13:06:22,059 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 125 for LOIs [2023-12-02 13:06:22,578 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 126 for LOIs [2023-12-02 13:06:23,082 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 16 for LOIs [2023-12-02 13:06:23,101 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 119 for LOIs [2023-12-02 13:06:23,186 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 130 for LOIs [2023-12-02 13:06:23,289 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:06:33,102 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '385306#(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) (= ~c_last_read~0 ~p_last_write~0) (exists ((|v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10| Int) (v_~q_req_up~0_103 Int) (|v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| Int) (v_~q_free~0_104 Int)) (and (or (and (<= v_~q_free~0_104 1) (<= 0 ~p_dw_pc~0) (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10|) (= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 0) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10| 1)) (and (= v_~q_free~0_104 0) (= ~p_dw_pc~0 1) (= 2 ~p_dw_st~0))) (or (exists ((v_~p_dw_pc~0_47 Int) (v_~p_dw_st~0_133 Int)) (and (or (and (<= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 2147483647) (= v_~p_dw_st~0_133 1) (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10|) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 2147483648)) (= v_~p_dw_pc~0_47 0) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10| 1)) (and (<= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 2147483647) (= v_~p_dw_pc~0_47 1) (<= 0 (+ ~p_last_write~0 2147483648)) (= v_~p_dw_st~0_133 1) (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10|) (<= ~p_last_write~0 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 2147483648)) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10| 1) (= v_~q_req_up~0_103 1))) (not (= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 0)) (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10| 0)))) (and (= ~p_dw_st~0 0) (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10| 0)))))) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_15| Int)) (and (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_15| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_15| 2147483648)) (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_15| 0)))) (= ~c_dr_st~0 1))' at error location [2023-12-02 13:06:33,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:06:33,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:06:33,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 49 [2023-12-02 13:06:33,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815651937] [2023-12-02 13:06:33,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:06:33,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-02 13:06:33,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:06:33,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-02 13:06:33,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=917, Invalid=10213, Unknown=0, NotChecked=0, Total=11130 [2023-12-02 13:06:33,105 INFO L87 Difference]: Start difference. First operand 5742 states and 6577 transitions. Second operand has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2023-12-02 13:06:39,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:06:39,603 INFO L93 Difference]: Finished difference Result 8591 states and 9919 transitions. [2023-12-02 13:06:39,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-12-02 13:06:39,603 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) Word has length 124 [2023-12-02 13:06:39,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:06:39,613 INFO L225 Difference]: With dead ends: 8591 [2023-12-02 13:06:39,613 INFO L226 Difference]: Without dead ends: 7520 [2023-12-02 13:06:39,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 307 SyntacticMatches, 9 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 14581 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=3470, Invalid=30202, Unknown=0, NotChecked=0, Total=33672 [2023-12-02 13:06:39,618 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 2580 mSDsluCounter, 2081 mSDsCounter, 0 mSdLazyCounter, 3662 mSolverCounterSat, 1488 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2582 SdHoareTripleChecker+Valid, 2234 SdHoareTripleChecker+Invalid, 5150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1488 IncrementalHoareTripleChecker+Valid, 3662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:06:39,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2582 Valid, 2234 Invalid, 5150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1488 Valid, 3662 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-12-02 13:06:39,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7520 states. [2023-12-02 13:06:40,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7520 to 6279. [2023-12-02 13:06:40,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6279 states, 4727 states have (on average 1.146181510471758) internal successors, (5418), 4787 states have internal predecessors, (5418), 818 states have call successors, (818), 687 states have call predecessors, (818), 732 states have return successors, (956), 805 states have call predecessors, (956), 815 states have call successors, (956) [2023-12-02 13:06:40,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6279 states to 6279 states and 7192 transitions. [2023-12-02 13:06:40,922 INFO L78 Accepts]: Start accepts. Automaton has 6279 states and 7192 transitions. Word has length 124 [2023-12-02 13:06:40,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:06:40,922 INFO L495 AbstractCegarLoop]: Abstraction has 6279 states and 7192 transitions. [2023-12-02 13:06:40,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2023-12-02 13:06:40,922 INFO L276 IsEmpty]: Start isEmpty. Operand 6279 states and 7192 transitions. [2023-12-02 13:06:40,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-02 13:06:40,925 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:06:40,925 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 13:06:40,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-02 13:06:41,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-12-02 13:06:41,125 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:06:41,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:06:41,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1704401071, now seen corresponding path program 1 times [2023-12-02 13:06:41,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:06:41,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176153791] [2023-12-02 13:06:41,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:06:41,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:06:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:06:41,268 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 13:06:41,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:06:41,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176153791] [2023-12-02 13:06:41,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176153791] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:06:41,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136917588] [2023-12-02 13:06:41,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:06:41,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:06:41,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:06:41,270 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:06:41,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-02 13:06:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:06:41,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 13:06:41,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:06:41,484 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 13:06:41,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:06:41,660 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 13:06:41,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136917588] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 13:06:41,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:06:41,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2023-12-02 13:06:41,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627225690] [2023-12-02 13:06:41,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:06:41,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 13:06:41,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:06:41,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 13:06:41,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-12-02 13:06:41,662 INFO L87 Difference]: Start difference. First operand 6279 states and 7192 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 13:06:43,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:06:43,312 INFO L93 Difference]: Finished difference Result 7244 states and 8289 transitions. [2023-12-02 13:06:43,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 13:06:43,313 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 13:06:43,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:06:43,320 INFO L225 Difference]: With dead ends: 7244 [2023-12-02 13:06:43,320 INFO L226 Difference]: Without dead ends: 5636 [2023-12-02 13:06:43,323 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 13:06:43,323 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 396 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:06:43,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 388 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:06:43,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5636 states. [2023-12-02 13:06:44,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5636 to 5289. [2023-12-02 13:06:44,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5289 states, 4030 states have (on average 1.1404466501240695) internal successors, (4596), 4089 states have internal predecessors, (4596), 668 states have call successors, (668), 566 states have call predecessors, (668), 589 states have return successors, (773), 634 states have call predecessors, (773), 665 states have call successors, (773) [2023-12-02 13:06:44,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5289 states to 5289 states and 6037 transitions. [2023-12-02 13:06:44,410 INFO L78 Accepts]: Start accepts. Automaton has 5289 states and 6037 transitions. Word has length 125 [2023-12-02 13:06:44,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:06:44,410 INFO L495 AbstractCegarLoop]: Abstraction has 5289 states and 6037 transitions. [2023-12-02 13:06:44,410 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 13:06:44,410 INFO L276 IsEmpty]: Start isEmpty. Operand 5289 states and 6037 transitions. [2023-12-02 13:06:44,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-12-02 13:06:44,413 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:06:44,413 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:06:44,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-02 13:06:44,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-12-02 13:06:44,614 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:06:44,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:06:44,614 INFO L85 PathProgramCache]: Analyzing trace with hash -2095898223, now seen corresponding path program 1 times [2023-12-02 13:06:44,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:06:44,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126084603] [2023-12-02 13:06:44,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:06:44,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:06:44,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:06:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-12-02 13:06:44,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:06:44,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126084603] [2023-12-02 13:06:44,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126084603] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:06:44,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:06:44,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 13:06:44,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58790479] [2023-12-02 13:06:44,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:06:44,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:06:44,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:06:44,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:06:44,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:06:44,727 INFO L87 Difference]: Start difference. First operand 5289 states and 6037 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-02 13:06:47,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:06:47,148 INFO L93 Difference]: Finished difference Result 12665 states and 14518 transitions. [2023-12-02 13:06:47,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:06:47,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 134 [2023-12-02 13:06:47,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:06:47,162 INFO L225 Difference]: With dead ends: 12665 [2023-12-02 13:06:47,163 INFO L226 Difference]: Without dead ends: 9942 [2023-12-02 13:06:47,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:06:47,167 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 331 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:06:47,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 733 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:06:47,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9942 states. [2023-12-02 13:06:48,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9942 to 7856. [2023-12-02 13:06:48,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7856 states, 5992 states have (on average 1.1505340453938584) internal successors, (6894), 6072 states have internal predecessors, (6894), 993 states have call successors, (993), 843 states have call predecessors, (993), 869 states have return successors, (1137), 941 states have call predecessors, (1137), 990 states have call successors, (1137) [2023-12-02 13:06:48,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7856 states to 7856 states and 9024 transitions. [2023-12-02 13:06:48,825 INFO L78 Accepts]: Start accepts. Automaton has 7856 states and 9024 transitions. Word has length 134 [2023-12-02 13:06:48,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:06:48,825 INFO L495 AbstractCegarLoop]: Abstraction has 7856 states and 9024 transitions. [2023-12-02 13:06:48,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-02 13:06:48,826 INFO L276 IsEmpty]: Start isEmpty. Operand 7856 states and 9024 transitions. [2023-12-02 13:06:48,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 13:06:48,829 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:06:48,829 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:06:48,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-12-02 13:06:48,830 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:06:48,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:06:48,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1436048907, now seen corresponding path program 1 times [2023-12-02 13:06:48,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:06:48,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249602228] [2023-12-02 13:06:48,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:06:48,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:06:48,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 13:06:48,853 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 13:06:48,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 13:06:48,957 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 13:06:48,957 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 13:06:48,958 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location error2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-12-02 13:06:48,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location error1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-12-02 13:06:48,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-12-02 13:06:48,962 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:06:48,965 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 13:06:49,048 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated [2023-12-02 13:06:49,053 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated [2023-12-02 13:06:49,069 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated [2023-12-02 13:06:49,101 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 01:06:49 BoogieIcfgContainer [2023-12-02 13:06:49,101 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 13:06:49,102 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 13:06:49,102 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 13:06:49,103 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 13:06:49,103 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:03:10" (3/4) ... [2023-12-02 13:06:49,104 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-12-02 13:06:49,132 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated [2023-12-02 13:06:49,134 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated [2023-12-02 13:06:49,142 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated [2023-12-02 13:06:49,226 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 13:06:49,227 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 13:06:49,227 INFO L158 Benchmark]: Toolchain (without parser) took 219748.44ms. Allocated memory was 140.5MB in the beginning and 2.2GB in the end (delta: 2.0GB). Free memory was 97.3MB in the beginning and 1.4GB in the end (delta: -1.3GB). Peak memory consumption was 783.1MB. Max. memory is 16.1GB. [2023-12-02 13:06:49,227 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 140.5MB. Free memory is still 112.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 13:06:49,227 INFO L158 Benchmark]: CACSL2BoogieTranslator took 440.95ms. Allocated memory is still 140.5MB. Free memory was 96.8MB in the beginning and 79.0MB in the end (delta: 17.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-12-02 13:06:49,228 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.93ms. Allocated memory is still 140.5MB. Free memory was 79.0MB in the beginning and 76.4MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-12-02 13:06:49,228 INFO L158 Benchmark]: Boogie Preprocessor took 48.53ms. Allocated memory is still 140.5MB. Free memory was 76.4MB in the beginning and 73.8MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 13:06:49,228 INFO L158 Benchmark]: RCFGBuilder took 915.52ms. Allocated memory is still 140.5MB. Free memory was 73.2MB in the beginning and 68.1MB in the end (delta: 5.1MB). Peak memory consumption was 27.7MB. Max. memory is 16.1GB. [2023-12-02 13:06:49,228 INFO L158 Benchmark]: TraceAbstraction took 218150.70ms. Allocated memory was 140.5MB in the beginning and 2.2GB in the end (delta: 2.0GB). Free memory was 67.4MB in the beginning and 1.4GB in the end (delta: -1.3GB). Peak memory consumption was 730.3MB. Max. memory is 16.1GB. [2023-12-02 13:06:49,228 INFO L158 Benchmark]: Witness Printer took 124.54ms. Allocated memory is still 2.2GB. Free memory was 1.4GB in the beginning and 1.4GB in the end (delta: 19.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-12-02 13:06:49,230 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 140.5MB. Free memory is still 112.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 440.95ms. Allocated memory is still 140.5MB. Free memory was 96.8MB in the beginning and 79.0MB in the end (delta: 17.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.93ms. Allocated memory is still 140.5MB. Free memory was 79.0MB in the beginning and 76.4MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.53ms. Allocated memory is still 140.5MB. Free memory was 76.4MB in the beginning and 73.8MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 915.52ms. Allocated memory is still 140.5MB. Free memory was 73.2MB in the beginning and 68.1MB in the end (delta: 5.1MB). Peak memory consumption was 27.7MB. Max. memory is 16.1GB. * TraceAbstraction took 218150.70ms. Allocated memory was 140.5MB in the beginning and 2.2GB in the end (delta: 2.0GB). Free memory was 67.4MB in the beginning and 1.4GB in the end (delta: -1.3GB). Peak memory consumption was 730.3MB. Max. memory is 16.1GB. * Witness Printer took 124.54ms. Allocated memory is still 2.2GB. Free memory was 1.4GB in the beginning and 1.4GB in the end (delta: 19.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 496]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L33] int q_buf_0 ; [L34] int q_free ; [L35] int q_read_ev ; [L36] int q_write_ev ; [L37] int q_req_up ; [L38] int q_ev ; [L59] int p_num_write ; [L60] int p_last_write ; [L61] int p_dw_st ; [L62] int p_dw_pc ; [L63] int p_dw_i ; [L64] int c_num_read ; [L65] int c_last_read ; [L66] int c_dr_st ; [L67] int c_dr_pc ; [L68] int c_dr_i ; [L172] static int a_t ; [L500] int m_pc = 0; [L501] int t1_pc = 0; [L502] int t2_pc = 0; [L503] int m_st ; [L504] int t1_st ; [L505] int t2_st ; [L506] int m_i ; [L507] int t1_i ; [L508] int t2_i ; [L509] int M_E = 2; [L510] int T1_E = 2; [L511] int T2_E = 2; [L512] int E_M = 2; [L513] int E_1 = 2; [L514] int E_2 = 2; [L519] int token ; [L521] int local ; [L1099] COND FALSE !(__VERIFIER_nondet_int()) [L1102] CALL main2() [L1086] int __retres1 ; [L1090] CALL init_model2() [L1000] m_i = 1 [L1001] t1_i = 1 [L1002] t2_i = 1 [L1090] RET init_model2() [L1091] CALL start_simulation2() [L1027] int kernel_st ; [L1028] int tmp ; [L1029] int tmp___0 ; [L1033] kernel_st = 0 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, kernel_st=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, token=0] [L1034] FCALL update_channels2() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, kernel_st=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, token=0] [L1035] CALL init_threads2() [L719] COND TRUE m_i == 1 [L720] m_st = 0 [L724] COND TRUE t1_i == 1 [L725] t1_st = 0 [L729] COND TRUE t2_i == 1 [L730] t2_st = 0 [L1035] RET init_threads2() [L1036] CALL fire_delta_events2() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(E_1)=2, \old(E_2)=2, \old(E_M)=2, \old(M_E)=2, \old(T1_E)=2, \old(T2_E)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, token=0] [L832] COND FALSE !(M_E == 0) [L837] COND FALSE !(T1_E == 0) [L842] COND FALSE !(T2_E == 0) [L847] COND FALSE !(E_M == 0) [L852] COND FALSE !(E_1 == 0) [L857] COND FALSE !(E_2 == 0) [L1036] RET fire_delta_events2() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, kernel_st=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, token=0] [L1037] CALL activate_threads2() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, token=0] [L905] int tmp ; [L906] int tmp___0 ; [L907] int tmp___1 ; [L911] CALL, EXPR is_master_triggered() [L651] int __retres1 ; VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, token=0] [L654] COND FALSE !(m_pc == 1) VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, token=0] [L664] __retres1 = 0 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, token=0] [L666] return (__retres1); [L911] RET, EXPR is_master_triggered() [L911] tmp = is_master_triggered() [L913] COND FALSE !(\read(tmp)) [L919] CALL, EXPR is_transmit1_triggered() [L670] int __retres1 ; VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, token=0] [L673] COND FALSE !(t1_pc == 1) VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, token=0] [L683] __retres1 = 0 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, token=0] [L685] return (__retres1); [L919] RET, EXPR is_transmit1_triggered() [L919] tmp___0 = is_transmit1_triggered() [L921] COND FALSE !(\read(tmp___0)) [L927] CALL, EXPR is_transmit2_triggered() [L689] int __retres1 ; VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, token=0] [L692] COND FALSE !(t2_pc == 1) VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, token=0] [L702] __retres1 = 0 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, token=0] [L704] return (__retres1); [L927] RET, EXPR is_transmit2_triggered() [L927] tmp___1 = is_transmit2_triggered() [L929] COND FALSE !(\read(tmp___1)) [L1037] RET activate_threads2() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, kernel_st=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, token=0] [L1038] CALL reset_delta_events2() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(E_1)=2, \old(E_2)=2, \old(E_M)=2, \old(M_E)=2, \old(T1_E)=2, \old(T2_E)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, token=0] [L870] COND FALSE !(M_E == 1) [L875] COND FALSE !(T1_E == 1) [L880] COND FALSE !(T2_E == 1) [L885] COND FALSE !(E_M == 1) [L890] COND FALSE !(E_1 == 1) [L895] COND FALSE !(E_2 == 1) [L1038] RET reset_delta_events2() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, kernel_st=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, token=0] [L1041] COND TRUE 1 [L1044] kernel_st = 1 [L1045] CALL eval2() [L765] int tmp ; VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, token=0] [L769] COND TRUE 1 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, token=0] [L772] CALL, EXPR exists_runnable_thread2() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, token=0] [L739] int __retres1 ; [L742] COND TRUE m_st == 0 [L743] __retres1 = 1 [L760] return (__retres1); [L772] RET, EXPR exists_runnable_thread2() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, token=0] [L772] tmp = exists_runnable_thread2() [L774] COND TRUE \read(tmp) VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, tmp=1, token=0] [L779] COND TRUE m_st == 0 [L780] int tmp_ndt_1; [L781] EXPR tmp_ndt_1 = __VERIFIER_nondet_int() [L782] COND FALSE, EXPR !(\read(tmp_ndt_1)) VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, tmp=1, tmp_ndt_1=0, token=0] [L779-L790] { int tmp_ndt_1; tmp_ndt_1 = __VERIFIER_nondet_int(); if (tmp_ndt_1) { { m_st = 1; master(); } } else { } } VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, tmp=1, token=0] [L793] COND TRUE t1_st == 0 [L794] int tmp_ndt_2; [L795] EXPR tmp_ndt_2 = __VERIFIER_nondet_int() [L796] COND TRUE, EXPR \read(tmp_ndt_2) [L798] EXPR t1_st = 1 [L799] CALL, EXPR transmit1() [L582] COND TRUE t1_pc == 0 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=1, t2_i=1, t2_pc=0, t2_st=0, token=0] [L593] COND TRUE 1 [L595] t1_pc = 1 [L596] t1_st = 2 [L799] RET, EXPR transmit1() [L793-L804] { int tmp_ndt_2; tmp_ndt_2 = __VERIFIER_nondet_int(); if (tmp_ndt_2) { { t1_st = 1; transmit1(); } } else { } } VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=0, t2_st=0, tmp=1, token=0] [L807] COND TRUE t2_st == 0 [L808] int tmp_ndt_3; [L809] EXPR tmp_ndt_3 = __VERIFIER_nondet_int() [L810] COND TRUE, EXPR \read(tmp_ndt_3) [L812] EXPR t2_st = 1 [L813] CALL, EXPR transmit2() [L618] COND TRUE t2_pc == 0 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=0, t2_st=1, token=0] [L629] COND TRUE 1 [L631] t2_pc = 1 [L632] t2_st = 2 [L813] RET, EXPR transmit2() [L807-L818] { int tmp_ndt_3; tmp_ndt_3 = __VERIFIER_nondet_int(); if (tmp_ndt_3) { { t2_st = 1; transmit2(); } } else { } } VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, tmp=1, token=0] [L769] COND TRUE 1 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, tmp=1, token=0] [L772] CALL, EXPR exists_runnable_thread2() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L739] int __retres1 ; [L742] COND TRUE m_st == 0 [L743] __retres1 = 1 [L760] return (__retres1); [L772] RET, EXPR exists_runnable_thread2() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, tmp=1, token=0] [L772] tmp = exists_runnable_thread2() [L774] COND TRUE \read(tmp) VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, tmp=1, token=0] [L779] COND TRUE m_st == 0 [L780] int tmp_ndt_1; [L781] EXPR tmp_ndt_1 = __VERIFIER_nondet_int() [L782] COND TRUE, EXPR \read(tmp_ndt_1) [L784] EXPR m_st = 1 [L785] CALL, EXPR master() [L524] int tmp_var = __VERIFIER_nondet_int(); [L526] COND TRUE m_pc == 0 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, tmp_var=0, token=0] [L537] COND TRUE 1 [L540] token = __VERIFIER_nondet_int() [L541] local = token [L542] E_1 = 1 VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, tmp_var=0, token=0] [L543] CALL immediate_notify() VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L943] CALL activate_threads2() VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L905] int tmp ; [L906] int tmp___0 ; [L907] int tmp___1 ; [L911] CALL, EXPR is_master_triggered() [L651] int __retres1 ; VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L654] COND FALSE !(m_pc == 1) VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L664] __retres1 = 0 VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L666] return (__retres1); [L911] RET, EXPR is_master_triggered() [L911] tmp = is_master_triggered() [L913] COND FALSE !(\read(tmp)) [L919] CALL, EXPR is_transmit1_triggered() [L670] int __retres1 ; VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L673] COND TRUE t1_pc == 1 VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L674] COND TRUE E_1 == 1 [L675] __retres1 = 1 VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, __retres1=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L685] return (__retres1); [L919] RET, EXPR is_transmit1_triggered() [L919] tmp___0 = is_transmit1_triggered() [L921] COND TRUE \read(tmp___0) [L922] t1_st = 0 [L927] CALL, EXPR is_transmit2_triggered() [L689] int __retres1 ; VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=0, t2_i=1, t2_pc=1, t2_st=2, token=0] [L692] COND TRUE t2_pc == 1 VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=0, t2_i=1, t2_pc=1, t2_st=2, token=0] [L693] COND FALSE !(E_2 == 1) VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=0, t2_i=1, t2_pc=1, t2_st=2, token=0] [L702] __retres1 = 0 VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=0, t2_i=1, t2_pc=1, t2_st=2, token=0] [L704] return (__retres1); [L927] RET, EXPR is_transmit2_triggered() [L927] tmp___1 = is_transmit2_triggered() [L929] COND FALSE !(\read(tmp___1)) [L943] RET activate_threads2() VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=0, t2_i=1, t2_pc=1, t2_st=2, token=0] [L543] RET immediate_notify() VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=0, t2_i=1, t2_pc=1, t2_st=2, tmp_var=0, token=0] [L544] E_1 = 2 [L545] m_pc = 1 [L546] m_st = 2 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=0, t2_i=1, t2_pc=1, t2_st=2, tmp_var=0, token=0] [L785] RET, EXPR master() [L779-L790] { int tmp_ndt_1; tmp_ndt_1 = __VERIFIER_nondet_int(); if (tmp_ndt_1) { { m_st = 1; master(); } } else { } } VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=0, t2_i=1, t2_pc=1, t2_st=2, tmp=1, token=0] [L793] COND TRUE t1_st == 0 [L794] int tmp_ndt_2; [L795] EXPR tmp_ndt_2 = __VERIFIER_nondet_int() [L796] COND TRUE, EXPR \read(tmp_ndt_2) [L798] EXPR t1_st = 1 [L799] CALL, EXPR transmit1() [L582] COND FALSE !(t1_pc == 0) VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, token=0] [L585] COND TRUE t1_pc == 1 [L601] token += 1 [L602] E_2 = 1 VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, token=1] [L603] CALL immediate_notify() VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, token=1] [L943] CALL activate_threads2() VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, token=1] [L905] int tmp ; [L906] int tmp___0 ; [L907] int tmp___1 ; [L911] CALL, EXPR is_master_triggered() [L651] int __retres1 ; VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, token=1] [L654] COND TRUE m_pc == 1 VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, token=1] [L655] COND FALSE !(E_M == 1) VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, token=1] [L664] __retres1 = 0 VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, token=1] [L666] return (__retres1); [L911] RET, EXPR is_master_triggered() [L911] tmp = is_master_triggered() [L913] COND FALSE !(\read(tmp)) [L919] CALL, EXPR is_transmit1_triggered() [L670] int __retres1 ; VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, token=1] [L673] COND TRUE t1_pc == 1 VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, token=1] [L674] COND FALSE !(E_1 == 1) VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, token=1] [L683] __retres1 = 0 VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, token=1] [L685] return (__retres1); [L919] RET, EXPR is_transmit1_triggered() [L919] tmp___0 = is_transmit1_triggered() [L921] COND FALSE !(\read(tmp___0)) [L927] CALL, EXPR is_transmit2_triggered() [L689] int __retres1 ; VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, token=1] [L692] COND TRUE t2_pc == 1 VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, token=1] [L693] COND TRUE E_2 == 1 [L694] __retres1 = 1 VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, __retres1=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, token=1] [L704] return (__retres1); [L927] RET, EXPR is_transmit2_triggered() [L927] tmp___1 = is_transmit2_triggered() [L929] COND TRUE \read(tmp___1) [L930] t2_st = 0 [L943] RET activate_threads2() VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=0, token=1] [L603] RET immediate_notify() VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=0, token=1] [L604] E_2 = 2 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=0, token=1] [L593] COND TRUE 1 [L595] t1_pc = 1 [L596] t1_st = 2 [L799] RET, EXPR transmit1() [L793-L804] { int tmp_ndt_2; tmp_ndt_2 = __VERIFIER_nondet_int(); if (tmp_ndt_2) { { t1_st = 1; transmit1(); } } else { } } VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=0, tmp=1, token=1] [L807] COND TRUE t2_st == 0 [L808] int tmp_ndt_3; [L809] EXPR tmp_ndt_3 = __VERIFIER_nondet_int() [L810] COND TRUE, EXPR \read(tmp_ndt_3) [L812] EXPR t2_st = 1 [L813] CALL, EXPR transmit2() [L618] COND FALSE !(t2_pc == 0) VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, token=1] [L621] COND TRUE t2_pc == 1 [L637] token += 1 [L638] E_M = 1 VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L639] CALL immediate_notify() VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L943] CALL activate_threads2() VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L905] int tmp ; [L906] int tmp___0 ; [L907] int tmp___1 ; [L911] CALL, EXPR is_master_triggered() [L651] int __retres1 ; VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L654] COND TRUE m_pc == 1 VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L655] COND TRUE E_M == 1 [L656] __retres1 = 1 VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, __retres1=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L666] return (__retres1); [L911] RET, EXPR is_master_triggered() [L911] tmp = is_master_triggered() [L913] COND TRUE \read(tmp) [L914] m_st = 0 [L919] CALL, EXPR is_transmit1_triggered() [L670] int __retres1 ; VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L673] COND TRUE t1_pc == 1 VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L674] COND FALSE !(E_1 == 1) VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L683] __retres1 = 0 VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L685] return (__retres1); [L919] RET, EXPR is_transmit1_triggered() [L919] tmp___0 = is_transmit1_triggered() [L921] COND FALSE !(\read(tmp___0)) [L927] CALL, EXPR is_transmit2_triggered() [L689] int __retres1 ; VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L692] COND TRUE t2_pc == 1 VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L693] COND FALSE !(E_2 == 1) VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L702] __retres1 = 0 VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L704] return (__retres1); [L927] RET, EXPR is_transmit2_triggered() [L927] tmp___1 = is_transmit2_triggered() [L929] COND FALSE !(\read(tmp___1)) [L943] RET activate_threads2() VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L639] RET immediate_notify() VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L640] E_M = 2 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L629] COND TRUE 1 [L631] t2_pc = 1 [L632] t2_st = 2 [L813] RET, EXPR transmit2() [L807-L818] { int tmp_ndt_3; tmp_ndt_3 = __VERIFIER_nondet_int(); if (tmp_ndt_3) { { t2_st = 1; transmit2(); } } else { } } VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, tmp=1, token=2] [L769] COND TRUE 1 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, tmp=1, token=2] [L772] CALL, EXPR exists_runnable_thread2() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, token=2] [L739] int __retres1 ; [L742] COND TRUE m_st == 0 [L743] __retres1 = 1 [L760] return (__retres1); [L772] RET, EXPR exists_runnable_thread2() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, tmp=1, token=2] [L772] tmp = exists_runnable_thread2() [L774] COND TRUE \read(tmp) VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, tmp=1, token=2] [L779] COND TRUE m_st == 0 [L780] int tmp_ndt_1; [L781] tmp_ndt_1 = __VERIFIER_nondet_int() [L782] COND TRUE \read(tmp_ndt_1) [L784] m_st = 1 [L785] CALL master() [L524] int tmp_var = __VERIFIER_nondet_int(); [L526] COND FALSE !(m_pc == 0) VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, tmp_var=5, token=2] [L529] COND TRUE m_pc == 1 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, tmp_var=5, token=2] [L551] COND FALSE !(token != local + 2) [L556] COND TRUE tmp_var <= 5 [L557] COND TRUE tmp_var >= 5 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, tmp_var=5, token=2] [L562] COND TRUE tmp_var <= 5 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, tmp_var=5, token=2] [L563] COND TRUE tmp_var >= 5 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, tmp_var=5, token=2] [L564] COND TRUE tmp_var == 5 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, tmp_var=5, token=2] [L565] CALL error2() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, token=2] [L496] reach_error() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, token=2] - UnprovableResult [Line: 28]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 16 procedures, 159 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 218.0s, OverallIterations: 41, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.2s, AutomataDifference: 75.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 17788 SdHoareTripleChecker+Valid, 21.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 17660 mSDsluCounter, 29840 SdHoareTripleChecker+Invalid, 18.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 21710 mSDsCounter, 6518 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 27556 IncrementalHoareTripleChecker+Invalid, 34074 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6518 mSolverCounterUnsat, 8130 mSDtfsCounter, 27556 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4738 GetRequests, 3534 SyntacticMatches, 17 SemanticMatches, 1187 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 95197 ImplicationChecksByTransitivity, 84.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7856occurred in iteration=40, InterpolantAutomatonStates: 778, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 19.0s AutomataMinimizationTime, 40 MinimizatonAttempts, 14894 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 14.5s InterpolantComputationTime, 6250 NumberOfCodeBlocks, 6162 NumberOfCodeBlocksAsserted, 66 NumberOfCheckSat, 6758 ConstructedInterpolants, 0 QuantifiedInterpolants, 17928 SizeOfPredicates, 59 NumberOfNonLiveVariables, 10414 ConjunctsInSsa, 340 ConjunctsInUnsatCore, 70 InterpolantComputations, 35 PerfectInterpolantSequences, 3051/3526 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 3.5s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 8, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 54, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 59, TOOLS_POST_TIME: 1.1s, TOOLS_POST_CALL_APPLICATIONS: 25, TOOLS_POST_CALL_TIME: 0.8s, TOOLS_POST_RETURN_APPLICATIONS: 18, TOOLS_POST_RETURN_TIME: 0.7s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 102, TOOLS_QUANTIFIERELIM_TIME: 2.6s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 162, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 21, DOMAIN_JOIN_TIME: 0.6s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 54, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 0.1s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.1s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 18, CALL_SUMMARIZER_CACHE_MISSES: 7, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 888, DAG_COMPRESSION_RETAINED_NODES: 150, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-12-02 13:06:49,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb7f928-c226-43b3-a90c-d9d56cd6ab5f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE