./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.07.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.07.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2 --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 9629d1cdaf2a4c1ffb7c786f584a153b15eed3823334fbbe8ec635b18d57c1af --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 11:22:43,926 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 11:22:44,021 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 11:22:44,028 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 11:22:44,030 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 11:22:44,063 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 11:22:44,064 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 11:22:44,065 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 11:22:44,066 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 11:22:44,067 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 11:22:44,069 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 11:22:44,070 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 11:22:44,070 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 11:22:44,070 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 11:22:44,071 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 11:22:44,071 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 11:22:44,075 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 11:22:44,075 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 11:22:44,076 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 11:22:44,076 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 11:22:44,076 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 11:22:44,077 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 11:22:44,078 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 11:22:44,078 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 11:22:44,080 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 11:22:44,081 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 11:22:44,081 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 11:22:44,081 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 11:22:44,082 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 11:22:44,082 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 11:22:44,082 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 11:22:44,083 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 11:22:44,083 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 11:22:44,083 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 11:22:44,083 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 11:22:44,084 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 11:22:44,084 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 11:22:44,084 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 11:22:44,085 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:22:44,085 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 11:22:44,085 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 11:22:44,087 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 11:22:44,087 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 11:22:44,088 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 11:22:44,088 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 11:22:44,089 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 11:22:44,089 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 11:22:44,090 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_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9629d1cdaf2a4c1ffb7c786f584a153b15eed3823334fbbe8ec635b18d57c1af [2024-11-02 11:22:44,414 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 11:22:44,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 11:22:44,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 11:22:44,449 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 11:22:44,449 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 11:22:44,451 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.07.cil-2.c Unable to find full path for "g++" [2024-11-02 11:22:46,665 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 11:22:46,928 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 11:22:46,932 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d97c4b82-014e-42ce-9082-0e920eb34a43/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.07.cil-2.c [2024-11-02 11:22:46,953 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2/data/7d92eb035/116a3b71a4ea4d919f37d9fc74c620e4/FLAG307469778 [2024-11-02 11:22:46,970 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2/data/7d92eb035/116a3b71a4ea4d919f37d9fc74c620e4 [2024-11-02 11:22:46,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 11:22:46,975 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 11:22:46,977 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 11:22:46,977 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 11:22:46,983 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 11:22:46,984 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:22:46" (1/1) ... [2024-11-02 11:22:46,985 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19721658 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:22:46, skipping insertion in model container [2024-11-02 11:22:46,985 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:22:46" (1/1) ... [2024-11-02 11:22:47,058 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 11:22:47,311 WARN L251 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_d97c4b82-014e-42ce-9082-0e920eb34a43/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.07.cil-2.c[911,924] [2024-11-02 11:22:47,407 WARN L251 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_d97c4b82-014e-42ce-9082-0e920eb34a43/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.07.cil-2.c[8416,8429] [2024-11-02 11:22:47,515 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:22:47,536 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 11:22:47,553 WARN L251 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_d97c4b82-014e-42ce-9082-0e920eb34a43/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.07.cil-2.c[911,924] [2024-11-02 11:22:47,591 WARN L251 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_d97c4b82-014e-42ce-9082-0e920eb34a43/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.07.cil-2.c[8416,8429] [2024-11-02 11:22:47,658 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:22:47,701 INFO L204 MainTranslator]: Completed translation [2024-11-02 11:22:47,701 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:22:47 WrapperNode [2024-11-02 11:22:47,702 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 11:22:47,703 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 11:22:47,704 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 11:22:47,704 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 11:22:47,740 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:22:47" (1/1) ... [2024-11-02 11:22:47,756 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:22:47" (1/1) ... [2024-11-02 11:22:47,811 INFO L138 Inliner]: procedures = 69, calls = 83, calls flagged for inlining = 37, calls inlined = 37, statements flattened = 812 [2024-11-02 11:22:47,811 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 11:22:47,812 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 11:22:47,813 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 11:22:47,813 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 11:22:47,826 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:22:47" (1/1) ... [2024-11-02 11:22:47,827 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:22:47" (1/1) ... [2024-11-02 11:22:47,835 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:22:47" (1/1) ... [2024-11-02 11:22:47,835 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:22:47" (1/1) ... [2024-11-02 11:22:47,854 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:22:47" (1/1) ... [2024-11-02 11:22:47,869 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:22:47" (1/1) ... [2024-11-02 11:22:47,873 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:22:47" (1/1) ... [2024-11-02 11:22:47,880 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:22:47" (1/1) ... [2024-11-02 11:22:47,888 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 11:22:47,893 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 11:22:47,894 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 11:22:47,894 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 11:22:47,897 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:22:47" (1/1) ... [2024-11-02 11:22:47,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:22:47,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:22:47,947 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 11:22:47,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 11:22:47,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 11:22:47,999 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-02 11:22:48,000 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-02 11:22:48,000 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2024-11-02 11:22:48,000 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2024-11-02 11:22:48,000 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-02 11:22:48,000 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-02 11:22:48,001 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-02 11:22:48,001 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-02 11:22:48,001 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2024-11-02 11:22:48,001 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2024-11-02 11:22:48,001 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-02 11:22:48,001 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-02 11:22:48,002 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-02 11:22:48,002 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-02 11:22:48,002 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2024-11-02 11:22:48,004 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2024-11-02 11:22:48,004 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2024-11-02 11:22:48,004 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2024-11-02 11:22:48,004 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2024-11-02 11:22:48,004 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2024-11-02 11:22:48,004 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-02 11:22:48,005 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-02 11:22:48,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 11:22:48,005 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-02 11:22:48,005 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-02 11:22:48,005 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2024-11-02 11:22:48,005 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2024-11-02 11:22:48,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 11:22:48,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 11:22:48,008 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-02 11:22:48,008 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-02 11:22:48,009 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2024-11-02 11:22:48,009 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2024-11-02 11:22:48,186 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 11:22:48,188 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 11:22:49,100 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2024-11-02 11:22:49,100 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2024-11-02 11:22:49,355 INFO L? ?]: Removed 104 outVars from TransFormulas that were not future-live. [2024-11-02 11:22:49,355 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 11:22:49,939 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 11:22:49,939 INFO L316 CfgBuilder]: Removed 14 assume(true) statements. [2024-11-02 11:22:49,940 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:22:49 BoogieIcfgContainer [2024-11-02 11:22:49,940 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 11:22:49,945 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 11:22:49,945 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 11:22:49,949 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 11:22:49,949 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:22:46" (1/3) ... [2024-11-02 11:22:49,950 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a3572b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:22:49, skipping insertion in model container [2024-11-02 11:22:49,951 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:22:47" (2/3) ... [2024-11-02 11:22:49,952 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a3572b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:22:49, skipping insertion in model container [2024-11-02 11:22:49,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:22:49" (3/3) ... [2024-11-02 11:22:49,954 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.07.cil-2.c [2024-11-02 11:22:49,977 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 11:22:49,977 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-02 11:22:50,089 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 11:22:50,099 INFO L333 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, 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;@2cafda4e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 11:22:50,099 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-02 11:22:50,107 INFO L276 IsEmpty]: Start isEmpty. Operand has 226 states, 169 states have (on average 1.5088757396449703) internal successors, (255), 177 states have internal predecessors, (255), 39 states have call successors, (39), 15 states have call predecessors, (39), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2024-11-02 11:22:50,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-02 11:22:50,122 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:22:50,124 INFO L215 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] [2024-11-02 11:22:50,125 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:22:50,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:22:50,134 INFO L85 PathProgramCache]: Analyzing trace with hash -218878936, now seen corresponding path program 1 times [2024-11-02 11:22:50,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:22:50,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426132529] [2024-11-02 11:22:50,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:22:50,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:22:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:22:50,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:22:50,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:22:50,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426132529] [2024-11-02 11:22:50,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426132529] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:22:50,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:22:50,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 11:22:50,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825201236] [2024-11-02 11:22:50,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:22:50,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 11:22:50,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:22:50,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 11:22:50,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:22:50,744 INFO L87 Difference]: Start difference. First operand has 226 states, 169 states have (on average 1.5088757396449703) internal successors, (255), 177 states have internal predecessors, (255), 39 states have call successors, (39), 15 states have call predecessors, (39), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-02 11:22:51,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:22:51,408 INFO L93 Difference]: Finished difference Result 574 states and 844 transitions. [2024-11-02 11:22:51,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 11:22:51,411 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2024-11-02 11:22:51,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:22:51,424 INFO L225 Difference]: With dead ends: 574 [2024-11-02 11:22:51,424 INFO L226 Difference]: Without dead ends: 349 [2024-11-02 11:22:51,429 INFO L431 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 [2024-11-02 11:22:51,432 INFO L432 NwaCegarLoop]: 325 mSDtfsCounter, 382 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-02 11:22:51,433 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 571 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-02 11:22:51,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-11-02 11:22:51,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 338. [2024-11-02 11:22:51,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 250 states have (on average 1.42) internal successors, (355), 255 states have internal predecessors, (355), 59 states have call successors, (59), 29 states have call predecessors, (59), 27 states have return successors, (58), 55 states have call predecessors, (58), 55 states have call successors, (58) [2024-11-02 11:22:51,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 472 transitions. [2024-11-02 11:22:51,518 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 472 transitions. Word has length 44 [2024-11-02 11:22:51,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:22:51,518 INFO L471 AbstractCegarLoop]: Abstraction has 338 states and 472 transitions. [2024-11-02 11:22:51,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-02 11:22:51,519 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 472 transitions. [2024-11-02 11:22:51,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-02 11:22:51,521 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:22:51,521 INFO L215 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] [2024-11-02 11:22:51,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 11:22:51,522 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:22:51,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:22:51,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1742649863, now seen corresponding path program 1 times [2024-11-02 11:22:51,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:22:51,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449213691] [2024-11-02 11:22:51,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:22:51,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:22:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:22:51,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:22:51,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:22:51,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449213691] [2024-11-02 11:22:51,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449213691] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:22:51,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:22:51,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 11:22:51,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237760804] [2024-11-02 11:22:51,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:22:51,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 11:22:51,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:22:51,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 11:22:51,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 11:22:51,713 INFO L87 Difference]: Start difference. First operand 338 states and 472 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) [2024-11-02 11:22:52,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:22:52,938 INFO L93 Difference]: Finished difference Result 875 states and 1195 transitions. [2024-11-02 11:22:52,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 11:22:52,939 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 [2024-11-02 11:22:52,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:22:52,946 INFO L225 Difference]: With dead ends: 875 [2024-11-02 11:22:52,947 INFO L226 Difference]: Without dead ends: 409 [2024-11-02 11:22:52,949 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-02 11:22:52,954 INFO L432 NwaCegarLoop]: 373 mSDtfsCounter, 842 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:22:52,954 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [851 Valid, 963 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-02 11:22:52,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2024-11-02 11:22:53,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 324. [2024-11-02 11:22:53,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 236 states have (on average 1.3644067796610169) internal successors, (322), 241 states have internal predecessors, (322), 59 states have call successors, (59), 29 states have call predecessors, (59), 27 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2024-11-02 11:22:53,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 436 transitions. [2024-11-02 11:22:53,057 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 436 transitions. Word has length 45 [2024-11-02 11:22:53,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:22:53,058 INFO L471 AbstractCegarLoop]: Abstraction has 324 states and 436 transitions. [2024-11-02 11:22:53,058 INFO L472 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) [2024-11-02 11:22:53,058 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 436 transitions. [2024-11-02 11:22:53,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-02 11:22:53,060 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:22:53,060 INFO L215 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] [2024-11-02 11:22:53,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 11:22:53,061 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:22:53,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:22:53,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1819041221, now seen corresponding path program 1 times [2024-11-02 11:22:53,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:22:53,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829315818] [2024-11-02 11:22:53,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:22:53,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:22:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:22:53,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:22:53,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:22:53,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829315818] [2024-11-02 11:22:53,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829315818] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:22:53,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:22:53,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 11:22:53,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351261051] [2024-11-02 11:22:53,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:22:53,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 11:22:53,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:22:53,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 11:22:53,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 11:22:53,221 INFO L87 Difference]: Start difference. First operand 324 states and 436 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 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) [2024-11-02 11:22:54,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:22:54,573 INFO L93 Difference]: Finished difference Result 790 states and 1044 transitions. [2024-11-02 11:22:54,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 11:22:54,574 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 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 46 [2024-11-02 11:22:54,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:22:54,605 INFO L225 Difference]: With dead ends: 790 [2024-11-02 11:22:54,605 INFO L226 Difference]: Without dead ends: 613 [2024-11-02 11:22:54,606 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-02 11:22:54,609 INFO L432 NwaCegarLoop]: 366 mSDtfsCounter, 756 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:22:54,612 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [762 Valid, 922 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-02 11:22:54,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2024-11-02 11:22:54,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 588. [2024-11-02 11:22:54,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 417 states have (on average 1.2973621103117505) internal successors, (541), 422 states have internal predecessors, (541), 108 states have call successors, (108), 63 states have call predecessors, (108), 61 states have return successors, (121), 104 states have call predecessors, (121), 104 states have call successors, (121) [2024-11-02 11:22:54,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 770 transitions. [2024-11-02 11:22:54,710 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 770 transitions. Word has length 46 [2024-11-02 11:22:54,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:22:54,711 INFO L471 AbstractCegarLoop]: Abstraction has 588 states and 770 transitions. [2024-11-02 11:22:54,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 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) [2024-11-02 11:22:54,711 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 770 transitions. [2024-11-02 11:22:54,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-02 11:22:54,713 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:22:54,713 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:22:54,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 11:22:54,714 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:22:54,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:22:54,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1838968535, now seen corresponding path program 1 times [2024-11-02 11:22:54,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:22:54,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562555345] [2024-11-02 11:22:54,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:22:54,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:22:54,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:22:54,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:22:54,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:22:54,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562555345] [2024-11-02 11:22:54,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562555345] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:22:54,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:22:54,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:22:54,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082611917] [2024-11-02 11:22:54,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:22:54,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:22:54,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:22:54,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:22:54,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:22:54,809 INFO L87 Difference]: Start difference. First operand 588 states and 770 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2024-11-02 11:22:54,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:22:54,962 INFO L93 Difference]: Finished difference Result 589 states and 771 transitions. [2024-11-02 11:22:54,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:22:54,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 50 [2024-11-02 11:22:54,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:22:54,966 INFO L225 Difference]: With dead ends: 589 [2024-11-02 11:22:54,966 INFO L226 Difference]: Without dead ends: 145 [2024-11-02 11:22:54,968 INFO L431 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 [2024-11-02 11:22:54,969 INFO L432 NwaCegarLoop]: 248 mSDtfsCounter, 280 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:22:54,974 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 248 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:22:54,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-11-02 11:22:54,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2024-11-02 11:22:54,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 115 states have (on average 1.4695652173913043) internal successors, (169), 117 states have internal predecessors, (169), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-02 11:22:54,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 213 transitions. [2024-11-02 11:22:54,996 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 213 transitions. Word has length 50 [2024-11-02 11:22:54,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:22:54,998 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 213 transitions. [2024-11-02 11:22:54,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2024-11-02 11:22:54,999 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 213 transitions. [2024-11-02 11:22:55,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-02 11:22:55,004 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:22:55,004 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:22:55,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 11:22:55,004 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:22:55,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:22:55,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1456908548, now seen corresponding path program 1 times [2024-11-02 11:22:55,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:22:55,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212728464] [2024-11-02 11:22:55,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:22:55,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:22:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:22:55,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:22:55,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:22:55,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212728464] [2024-11-02 11:22:55,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212728464] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:22:55,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:22:55,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-02 11:22:55,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802191751] [2024-11-02 11:22:55,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:22:55,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 11:22:55,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:22:55,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 11:22:55,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-02 11:22:55,162 INFO L87 Difference]: Start difference. First operand 145 states and 213 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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) [2024-11-02 11:22:56,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:22:56,086 INFO L93 Difference]: Finished difference Result 798 states and 1243 transitions. [2024-11-02 11:22:56,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 11:22:56,087 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 53 [2024-11-02 11:22:56,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:22:56,094 INFO L225 Difference]: With dead ends: 798 [2024-11-02 11:22:56,094 INFO L226 Difference]: Without dead ends: 659 [2024-11-02 11:22:56,096 INFO L431 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 [2024-11-02 11:22:56,098 INFO L432 NwaCegarLoop]: 326 mSDtfsCounter, 905 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-02 11:22:56,099 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [905 Valid, 889 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-02 11:22:56,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2024-11-02 11:22:56,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 646. [2024-11-02 11:22:56,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 527 states have (on average 1.459203036053131) internal successors, (769), 532 states have internal predecessors, (769), 88 states have call successors, (88), 31 states have call predecessors, (88), 30 states have return successors, (128), 83 states have call predecessors, (128), 86 states have call successors, (128) [2024-11-02 11:22:56,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 985 transitions. [2024-11-02 11:22:56,183 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 985 transitions. Word has length 53 [2024-11-02 11:22:56,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:22:56,184 INFO L471 AbstractCegarLoop]: Abstraction has 646 states and 985 transitions. [2024-11-02 11:22:56,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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) [2024-11-02 11:22:56,185 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 985 transitions. [2024-11-02 11:22:56,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-02 11:22:56,191 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:22:56,191 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:22:56,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 11:22:56,191 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:22:56,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:22:56,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1807797417, now seen corresponding path program 1 times [2024-11-02 11:22:56,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:22:56,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823550853] [2024-11-02 11:22:56,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:22:56,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:22:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:22:56,431 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-02 11:22:56,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:22:56,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823550853] [2024-11-02 11:22:56,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823550853] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:22:56,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259806811] [2024-11-02 11:22:56,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:22:56,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:22:56,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:22:56,437 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:22:56,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 11:22:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:22:56,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 11:22:56,668 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:22:56,741 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-02 11:22:56,741 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 11:22:56,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259806811] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:22:56,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 11:22:56,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-02 11:22:56,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106990857] [2024-11-02 11:22:56,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:22:56,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:22:56,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:22:56,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:22:56,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 11:22:56,744 INFO L87 Difference]: Start difference. First operand 646 states and 985 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-02 11:22:56,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:22:56,973 INFO L93 Difference]: Finished difference Result 1910 states and 2992 transitions. [2024-11-02 11:22:56,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:22:56,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 103 [2024-11-02 11:22:56,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:22:56,982 INFO L225 Difference]: With dead ends: 1910 [2024-11-02 11:22:56,982 INFO L226 Difference]: Without dead ends: 1270 [2024-11-02 11:22:56,985 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 11:22:56,986 INFO L432 NwaCegarLoop]: 175 mSDtfsCounter, 185 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:22:56,987 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 341 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:22:56,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2024-11-02 11:22:57,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 1261. [2024-11-02 11:22:57,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1035 states have (on average 1.4531400966183574) internal successors, (1504), 1043 states have internal predecessors, (1504), 165 states have call successors, (165), 61 states have call predecessors, (165), 60 states have return successors, (243), 157 states have call predecessors, (243), 163 states have call successors, (243) [2024-11-02 11:22:57,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 1912 transitions. [2024-11-02 11:22:57,143 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 1912 transitions. Word has length 103 [2024-11-02 11:22:57,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:22:57,146 INFO L471 AbstractCegarLoop]: Abstraction has 1261 states and 1912 transitions. [2024-11-02 11:22:57,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-02 11:22:57,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 1912 transitions. [2024-11-02 11:22:57,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-02 11:22:57,150 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:22:57,150 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:22:57,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-02 11:22:57,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-02 11:22:57,351 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:22:57,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:22:57,352 INFO L85 PathProgramCache]: Analyzing trace with hash -77525013, now seen corresponding path program 1 times [2024-11-02 11:22:57,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:22:57,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783665623] [2024-11-02 11:22:57,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:22:57,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:22:57,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:22:57,488 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-02 11:22:57,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:22:57,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783665623] [2024-11-02 11:22:57,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783665623] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:22:57,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176335702] [2024-11-02 11:22:57,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:22:57,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:22:57,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:22:57,491 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:22:57,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 11:22:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:22:57,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 11:22:57,698 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:22:57,775 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-02 11:22:57,775 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 11:22:57,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176335702] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:22:57,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 11:22:57,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-02 11:22:57,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235009714] [2024-11-02 11:22:57,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:22:57,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:22:57,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:22:57,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:22:57,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 11:22:57,777 INFO L87 Difference]: Start difference. First operand 1261 states and 1912 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-02 11:22:58,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:22:58,115 INFO L93 Difference]: Finished difference Result 3740 states and 5820 transitions. [2024-11-02 11:22:58,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:22:58,116 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 103 [2024-11-02 11:22:58,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:22:58,132 INFO L225 Difference]: With dead ends: 3740 [2024-11-02 11:22:58,132 INFO L226 Difference]: Without dead ends: 2485 [2024-11-02 11:22:58,138 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 11:22:58,139 INFO L432 NwaCegarLoop]: 175 mSDtfsCounter, 176 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:22:58,139 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 341 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:22:58,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2024-11-02 11:22:58,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 2471. [2024-11-02 11:22:58,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 2036 states have (on average 1.4459724950884087) internal successors, (2944), 2050 states have internal predecessors, (2944), 314 states have call successors, (314), 121 states have call predecessors, (314), 120 states have return successors, (464), 300 states have call predecessors, (464), 312 states have call successors, (464) [2024-11-02 11:22:58,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 3722 transitions. [2024-11-02 11:22:58,411 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 3722 transitions. Word has length 103 [2024-11-02 11:22:58,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:22:58,411 INFO L471 AbstractCegarLoop]: Abstraction has 2471 states and 3722 transitions. [2024-11-02 11:22:58,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-02 11:22:58,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 3722 transitions. [2024-11-02 11:22:58,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-02 11:22:58,419 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:22:58,420 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:22:58,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 11:22:58,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-02 11:22:58,621 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:22:58,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:22:58,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1786398103, now seen corresponding path program 1 times [2024-11-02 11:22:58,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:22:58,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266256352] [2024-11-02 11:22:58,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:22:58,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:22:58,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:22:58,940 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-02 11:22:58,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:22:58,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266256352] [2024-11-02 11:22:58,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266256352] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:22:58,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010384135] [2024-11-02 11:22:58,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:22:58,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:22:58,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:22:58,947 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:22:58,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 11:22:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:22:59,156 INFO L255 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 11:22:59,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:22:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-02 11:22:59,242 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 11:22:59,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010384135] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:22:59,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 11:22:59,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-02 11:22:59,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523387165] [2024-11-02 11:22:59,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:22:59,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:22:59,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:22:59,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:22:59,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 11:22:59,247 INFO L87 Difference]: Start difference. First operand 2471 states and 3722 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-02 11:22:59,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:22:59,720 INFO L93 Difference]: Finished difference Result 7340 states and 11335 transitions. [2024-11-02 11:22:59,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:22:59,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 103 [2024-11-02 11:22:59,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:22:59,756 INFO L225 Difference]: With dead ends: 7340 [2024-11-02 11:22:59,756 INFO L226 Difference]: Without dead ends: 4875 [2024-11-02 11:22:59,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 11:22:59,769 INFO L432 NwaCegarLoop]: 175 mSDtfsCounter, 182 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:22:59,769 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 341 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:22:59,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2024-11-02 11:23:00,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 4851. [2024-11-02 11:23:00,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4851 states, 4008 states have (on average 1.43812375249501) internal successors, (5764), 4034 states have internal predecessors, (5764), 602 states have call successors, (602), 241 states have call predecessors, (602), 240 states have return successors, (888), 576 states have call predecessors, (888), 600 states have call successors, (888) [2024-11-02 11:23:00,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4851 states to 4851 states and 7254 transitions. [2024-11-02 11:23:00,168 INFO L78 Accepts]: Start accepts. Automaton has 4851 states and 7254 transitions. Word has length 103 [2024-11-02 11:23:00,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:23:00,169 INFO L471 AbstractCegarLoop]: Abstraction has 4851 states and 7254 transitions. [2024-11-02 11:23:00,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-02 11:23:00,169 INFO L276 IsEmpty]: Start isEmpty. Operand 4851 states and 7254 transitions. [2024-11-02 11:23:00,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-02 11:23:00,176 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:23:00,177 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:23:00,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-02 11:23:00,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d97c4b82-014e-42ce-9082-0e920eb34a43/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-02 11:23:00,378 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:23:00,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:23:00,378 INFO L85 PathProgramCache]: Analyzing trace with hash -246149529, now seen corresponding path program 1 times [2024-11-02 11:23:00,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:23:00,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618787141] [2024-11-02 11:23:00,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:23:00,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:23:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:23:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-02 11:23:00,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:23:00,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618787141] [2024-11-02 11:23:00,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618787141] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:23:00,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:23:00,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:23:00,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776893541] [2024-11-02 11:23:00,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:23:00,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:23:00,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:23:00,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:23:00,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:23:00,494 INFO L87 Difference]: Start difference. First operand 4851 states and 7254 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-02 11:23:01,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:23:01,146 INFO L93 Difference]: Finished difference Result 9895 states and 15101 transitions. [2024-11-02 11:23:01,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:23:01,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 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 103 [2024-11-02 11:23:01,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:23:01,226 INFO L225 Difference]: With dead ends: 9895 [2024-11-02 11:23:01,226 INFO L226 Difference]: Without dead ends: 6003 [2024-11-02 11:23:01,240 INFO L431 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 [2024-11-02 11:23:01,241 INFO L432 NwaCegarLoop]: 270 mSDtfsCounter, 90 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:23:01,243 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 453 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:23:01,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6003 states. [2024-11-02 11:23:01,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6003 to 5619. [2024-11-02 11:23:01,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5619 states, 4744 states have (on average 1.4629005059021922) internal successors, (6940), 4770 states have internal predecessors, (6940), 618 states have call successors, (618), 257 states have call predecessors, (618), 256 states have return successors, (904), 592 states have call predecessors, (904), 616 states have call successors, (904) [2024-11-02 11:23:01,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5619 states to 5619 states and 8462 transitions. [2024-11-02 11:23:01,758 INFO L78 Accepts]: Start accepts. Automaton has 5619 states and 8462 transitions. Word has length 103 [2024-11-02 11:23:01,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:23:01,758 INFO L471 AbstractCegarLoop]: Abstraction has 5619 states and 8462 transitions. [2024-11-02 11:23:01,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-02 11:23:01,759 INFO L276 IsEmpty]: Start isEmpty. Operand 5619 states and 8462 transitions. [2024-11-02 11:23:01,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-02 11:23:01,775 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:23:01,776 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:23:01,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-02 11:23:01,776 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:23:01,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:23:01,777 INFO L85 PathProgramCache]: Analyzing trace with hash 767581196, now seen corresponding path program 1 times [2024-11-02 11:23:01,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:23:01,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040934366] [2024-11-02 11:23:01,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:23:01,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:23:01,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:23:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-02 11:23:01,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:23:01,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040934366] [2024-11-02 11:23:01,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040934366] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:23:01,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:23:01,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:23:01,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168047726] [2024-11-02 11:23:01,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:23:01,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:23:01,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:23:01,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:23:01,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:23:01,892 INFO L87 Difference]: Start difference. First operand 5619 states and 8462 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (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) [2024-11-02 11:23:02,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:23:02,837 INFO L93 Difference]: Finished difference Result 16668 states and 25595 transitions. [2024-11-02 11:23:02,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:23:02,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (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 139 [2024-11-02 11:23:02,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:23:02,955 INFO L225 Difference]: With dead ends: 16668 [2024-11-02 11:23:02,955 INFO L226 Difference]: Without dead ends: 11055 [2024-11-02 11:23:02,983 INFO L431 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 [2024-11-02 11:23:02,984 INFO L432 NwaCegarLoop]: 177 mSDtfsCounter, 175 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:23:02,985 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 343 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:23:02,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11055 states. [2024-11-02 11:23:03,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11055 to 10995. [2024-11-02 11:23:03,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10995 states, 9292 states have (on average 1.4520017219113215) internal successors, (13492), 9342 states have internal predecessors, (13492), 1190 states have call successors, (1190), 513 states have call predecessors, (1190), 512 states have return successors, (1732), 1140 states have call predecessors, (1732), 1188 states have call successors, (1732) [2024-11-02 11:23:04,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10995 states to 10995 states and 16414 transitions. [2024-11-02 11:23:04,063 INFO L78 Accepts]: Start accepts. Automaton has 10995 states and 16414 transitions. Word has length 139 [2024-11-02 11:23:04,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:23:04,064 INFO L471 AbstractCegarLoop]: Abstraction has 10995 states and 16414 transitions. [2024-11-02 11:23:04,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (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) [2024-11-02 11:23:04,065 INFO L276 IsEmpty]: Start isEmpty. Operand 10995 states and 16414 transitions. [2024-11-02 11:23:04,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-02 11:23:04,180 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:23:04,180 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:23:04,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-02 11:23:04,181 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:23:04,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:23:04,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1450423690, now seen corresponding path program 1 times [2024-11-02 11:23:04,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:23:04,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369743892] [2024-11-02 11:23:04,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:23:04,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:23:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:23:04,378 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-02 11:23:04,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:23:04,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369743892] [2024-11-02 11:23:04,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369743892] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:23:04,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:23:04,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:23:04,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528363941] [2024-11-02 11:23:04,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:23:04,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:23:04,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:23:04,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:23:04,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:23:04,381 INFO L87 Difference]: Start difference. First operand 10995 states and 16414 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (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) [2024-11-02 11:23:06,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:23:06,239 INFO L93 Difference]: Finished difference Result 32620 states and 49607 transitions. [2024-11-02 11:23:06,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:23:06,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (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 139 [2024-11-02 11:23:06,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:23:06,372 INFO L225 Difference]: With dead ends: 32620 [2024-11-02 11:23:06,372 INFO L226 Difference]: Without dead ends: 21631 [2024-11-02 11:23:06,431 INFO L431 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 [2024-11-02 11:23:06,432 INFO L432 NwaCegarLoop]: 177 mSDtfsCounter, 177 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:23:06,433 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 343 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:23:06,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21631 states. [2024-11-02 11:23:08,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21631 to 21515. [2024-11-02 11:23:08,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21515 states, 18196 states have (on average 1.4405363816223347) internal successors, (26212), 18294 states have internal predecessors, (26212), 2294 states have call successors, (2294), 1025 states have call predecessors, (2294), 1024 states have return successors, (3316), 2196 states have call predecessors, (3316), 2292 states have call successors, (3316) [2024-11-02 11:23:08,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21515 states to 21515 states and 31822 transitions. [2024-11-02 11:23:08,499 INFO L78 Accepts]: Start accepts. Automaton has 21515 states and 31822 transitions. Word has length 139 [2024-11-02 11:23:08,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:23:08,500 INFO L471 AbstractCegarLoop]: Abstraction has 21515 states and 31822 transitions. [2024-11-02 11:23:08,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (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) [2024-11-02 11:23:08,500 INFO L276 IsEmpty]: Start isEmpty. Operand 21515 states and 31822 transitions. [2024-11-02 11:23:08,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-02 11:23:08,571 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:23:08,571 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:23:08,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-02 11:23:08,572 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:23:08,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:23:08,573 INFO L85 PathProgramCache]: Analyzing trace with hash 2067262668, now seen corresponding path program 1 times [2024-11-02 11:23:08,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:23:08,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573006158] [2024-11-02 11:23:08,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:23:08,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:23:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:23:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-02 11:23:08,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:23:08,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573006158] [2024-11-02 11:23:08,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573006158] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:23:08,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:23:08,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:23:08,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356161135] [2024-11-02 11:23:08,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:23:08,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:23:08,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:23:08,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:23:08,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:23:08,705 INFO L87 Difference]: Start difference. First operand 21515 states and 31822 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (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) [2024-11-02 11:23:11,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:23:11,729 INFO L93 Difference]: Finished difference Result 63828 states and 96071 transitions. [2024-11-02 11:23:11,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:23:11,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (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 139 [2024-11-02 11:23:11,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:23:11,966 INFO L225 Difference]: With dead ends: 63828 [2024-11-02 11:23:11,966 INFO L226 Difference]: Without dead ends: 42319 [2024-11-02 11:23:12,201 INFO L431 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 [2024-11-02 11:23:12,202 INFO L432 NwaCegarLoop]: 177 mSDtfsCounter, 180 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:23:12,202 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 343 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:23:12,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42319 states.