./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_36f9f951-8a27-40fa-9259-6c98eb5665f5/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f9f951-8a27-40fa-9259-6c98eb5665f5/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f9f951-8a27-40fa-9259-6c98eb5665f5/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f9f951-8a27-40fa-9259-6c98eb5665f5/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f9f951-8a27-40fa-9259-6c98eb5665f5/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f9f951-8a27-40fa-9259-6c98eb5665f5/bin/utaipan-verify-mE87zJ7Ire --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 6d6da8f3ee43e0b2f144002fad1e1be3bc4062b8e0f7b0d6768d1ce0f0c5101f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:13:46,951 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:13:47,047 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f9f951-8a27-40fa-9259-6c98eb5665f5/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:13:47,053 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:13:47,053 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:13:47,090 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:13:47,093 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:13:47,094 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:13:47,095 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:13:47,096 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:13:47,097 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:13:47,098 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:13:47,099 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:13:47,103 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:13:47,104 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:13:47,104 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:13:47,106 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:13:47,106 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:13:47,107 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:13:47,107 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:13:47,108 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:13:47,108 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:13:47,109 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:13:47,110 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:13:47,110 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:13:47,111 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:13:47,111 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:13:47,111 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:13:47,112 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:13:47,112 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:13:47,113 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:13:47,114 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:13:47,114 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:13:47,114 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:13:47,115 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:13:47,115 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:13:47,115 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:13:47,115 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:13:47,116 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:13:47,116 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:13:47,117 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:13:47,117 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:13:47,117 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:13:47,118 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:13:47,118 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:13:47,118 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:13:47,119 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:13:47,119 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_36f9f951-8a27-40fa-9259-6c98eb5665f5/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f9f951-8a27-40fa-9259-6c98eb5665f5/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d6da8f3ee43e0b2f144002fad1e1be3bc4062b8e0f7b0d6768d1ce0f0c5101f [2023-11-23 21:13:47,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:13:47,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:13:47,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:13:47,480 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:13:47,481 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:13:47,482 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f9f951-8a27-40fa-9259-6c98eb5665f5/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c [2023-11-23 21:13:50,587 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:13:50,917 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:13:50,918 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f9f951-8a27-40fa-9259-6c98eb5665f5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c [2023-11-23 21:13:50,950 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f9f951-8a27-40fa-9259-6c98eb5665f5/bin/utaipan-verify-mE87zJ7Ire/data/412b1835f/13a2114da90b4ec5bdf93148ef67b43f/FLAGd57314d0d [2023-11-23 21:13:50,965 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f9f951-8a27-40fa-9259-6c98eb5665f5/bin/utaipan-verify-mE87zJ7Ire/data/412b1835f/13a2114da90b4ec5bdf93148ef67b43f [2023-11-23 21:13:50,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:13:50,970 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:13:50,971 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:13:50,971 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:13:50,977 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:13:50,978 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:13:50" (1/1) ... [2023-11-23 21:13:50,979 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c12b143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:50, skipping insertion in model container [2023-11-23 21:13:50,979 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:13:50" (1/1) ... [2023-11-23 21:13:51,047 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:13:51,230 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f9f951-8a27-40fa-9259-6c98eb5665f5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c[914,927] [2023-11-23 21:13:51,301 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f9f951-8a27-40fa-9259-6c98eb5665f5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c[7115,7128] [2023-11-23 21:13:51,495 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:13:51,509 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:13:51,523 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f9f951-8a27-40fa-9259-6c98eb5665f5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c[914,927] [2023-11-23 21:13:51,553 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f9f951-8a27-40fa-9259-6c98eb5665f5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c[7115,7128] [2023-11-23 21:13:51,603 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:13:51,632 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:13:51,632 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:51 WrapperNode [2023-11-23 21:13:51,633 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:13:51,634 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:13:51,634 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:13:51,634 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:13:51,642 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:51" (1/1) ... [2023-11-23 21:13:51,659 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:51" (1/1) ... [2023-11-23 21:13:51,720 INFO L138 Inliner]: procedures = 73, calls = 88, calls flagged for inlining = 41, calls inlined = 41, statements flattened = 956 [2023-11-23 21:13:51,721 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:13:51,722 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:13:51,722 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:13:51,722 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:13:51,748 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:51" (1/1) ... [2023-11-23 21:13:51,749 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:51" (1/1) ... [2023-11-23 21:13:51,762 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:51" (1/1) ... [2023-11-23 21:13:51,772 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:51" (1/1) ... [2023-11-23 21:13:51,818 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:51" (1/1) ... [2023-11-23 21:13:51,853 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:51" (1/1) ... [2023-11-23 21:13:51,865 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:51" (1/1) ... [2023-11-23 21:13:51,885 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:51" (1/1) ... [2023-11-23 21:13:51,891 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:13:51,892 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:13:51,892 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:13:51,892 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:13:51,895 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:51" (1/1) ... [2023-11-23 21:13:51,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:13:51,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f9f951-8a27-40fa-9259-6c98eb5665f5/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:13:51,941 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f9f951-8a27-40fa-9259-6c98eb5665f5/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:13:51,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f9f951-8a27-40fa-9259-6c98eb5665f5/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:13:51,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:13:51,986 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-23 21:13:51,987 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-23 21:13:51,987 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-11-23 21:13:51,988 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-11-23 21:13:51,988 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-23 21:13:51,988 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-23 21:13:51,988 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-23 21:13:51,988 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-23 21:13:51,988 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-11-23 21:13:51,989 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-11-23 21:13:51,989 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-23 21:13:51,989 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-23 21:13:51,990 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-23 21:13:51,990 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-23 21:13:51,991 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-11-23 21:13:51,991 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-11-23 21:13:51,992 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-11-23 21:13:51,992 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-11-23 21:13:51,992 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-11-23 21:13:51,993 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-11-23 21:13:51,993 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-23 21:13:51,994 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-23 21:13:51,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:13:51,994 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-23 21:13:51,995 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-23 21:13:51,995 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-11-23 21:13:51,995 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-11-23 21:13:51,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:13:51,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:13:51,996 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-23 21:13:51,996 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-23 21:13:51,996 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2023-11-23 21:13:51,996 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2023-11-23 21:13:52,169 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:13:52,172 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:13:53,128 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:13:53,795 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:13:53,796 INFO L309 CfgBuilder]: Removed 17 assume(true) statements. [2023-11-23 21:13:53,797 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:13:53 BoogieIcfgContainer [2023-11-23 21:13:53,798 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:13:53,800 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:13:53,800 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:13:53,803 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:13:53,803 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:13:50" (1/3) ... [2023-11-23 21:13:53,804 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1490f0a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:13:53, skipping insertion in model container [2023-11-23 21:13:53,804 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:51" (2/3) ... [2023-11-23 21:13:53,805 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1490f0a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:13:53, skipping insertion in model container [2023-11-23 21:13:53,805 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:13:53" (3/3) ... [2023-11-23 21:13:53,806 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.10.cil-1.c [2023-11-23 21:13:53,826 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:13:53,827 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 21:13:53,890 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:13:53,899 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@287bdd5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:13:53,899 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 21:13:53,907 INFO L276 IsEmpty]: Start isEmpty. Operand has 255 states, 197 states have (on average 1.5126903553299493) internal successors, (298), 205 states have internal predecessors, (298), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-23 21:13:53,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-23 21:13:53,923 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:53,924 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:53,924 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:53,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:53,932 INFO L85 PathProgramCache]: Analyzing trace with hash 436902740, now seen corresponding path program 1 times [2023-11-23 21:13:53,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:53,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498824590] [2023-11-23 21:13:53,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:53,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:54,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:13:54,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:54,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498824590] [2023-11-23 21:13:54,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498824590] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:54,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:54,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 21:13:54,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327081384] [2023-11-23 21:13:54,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:54,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:13:54,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:54,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:13:54,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:13:54,700 INFO L87 Difference]: Start difference. First operand has 255 states, 197 states have (on average 1.5126903553299493) internal successors, (298), 205 states have internal predecessors, (298), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 21:13:55,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:55,951 INFO L93 Difference]: Finished difference Result 566 states and 824 transitions. [2023-11-23 21:13:55,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 21:13:55,954 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2023-11-23 21:13:55,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:55,968 INFO L225 Difference]: With dead ends: 566 [2023-11-23 21:13:55,969 INFO L226 Difference]: Without dead ends: 314 [2023-11-23 21:13:55,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:13:55,979 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 540 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:55,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 1120 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 21:13:56,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2023-11-23 21:13:56,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 301. [2023-11-23 21:13:56,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 231 states have (on average 1.4415584415584415) internal successors, (333), 236 states have internal predecessors, (333), 48 states have call successors, (48), 22 states have call predecessors, (48), 20 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-23 21:13:56,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 425 transitions. [2023-11-23 21:13:56,059 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 425 transitions. Word has length 45 [2023-11-23 21:13:56,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:56,059 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 425 transitions. [2023-11-23 21:13:56,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 21:13:56,060 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 425 transitions. [2023-11-23 21:13:56,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-23 21:13:56,063 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:56,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:56,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:13:56,064 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:56,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:56,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1118234562, now seen corresponding path program 1 times [2023-11-23 21:13:56,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:56,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967830691] [2023-11-23 21:13:56,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:56,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:56,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:56,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:13:56,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:56,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967830691] [2023-11-23 21:13:56,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967830691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:56,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:56,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:13:56,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346188753] [2023-11-23 21:13:56,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:56,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:13:56,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:56,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:13:56,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:13:56,140 INFO L87 Difference]: Start difference. First operand 301 states and 425 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:13:56,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:56,294 INFO L93 Difference]: Finished difference Result 526 states and 712 transitions. [2023-11-23 21:13:56,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:13:56,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2023-11-23 21:13:56,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:56,303 INFO L225 Difference]: With dead ends: 526 [2023-11-23 21:13:56,303 INFO L226 Difference]: Without dead ends: 410 [2023-11-23 21:13:56,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:13:56,309 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 336 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:56,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 365 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:13:56,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2023-11-23 21:13:56,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 396. [2023-11-23 21:13:56,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 296 states have (on average 1.3952702702702702) internal successors, (413), 301 states have internal predecessors, (413), 64 states have call successors, (64), 36 states have call predecessors, (64), 34 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-23 21:13:56,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 537 transitions. [2023-11-23 21:13:56,385 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 537 transitions. Word has length 46 [2023-11-23 21:13:56,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:56,386 INFO L495 AbstractCegarLoop]: Abstraction has 396 states and 537 transitions. [2023-11-23 21:13:56,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:13:56,388 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 537 transitions. [2023-11-23 21:13:56,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 21:13:56,399 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:56,399 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:56,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:13:56,400 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:56,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:56,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1557455717, now seen corresponding path program 1 times [2023-11-23 21:13:56,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:56,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96209225] [2023-11-23 21:13:56,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:56,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:56,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:56,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:13:56,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:56,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96209225] [2023-11-23 21:13:56,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96209225] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:56,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:56,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:13:56,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442155409] [2023-11-23 21:13:56,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:56,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:13:56,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:56,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:13:56,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:13:56,501 INFO L87 Difference]: Start difference. First operand 396 states and 537 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:13:56,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:56,707 INFO L93 Difference]: Finished difference Result 760 states and 985 transitions. [2023-11-23 21:13:56,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:13:56,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2023-11-23 21:13:56,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:56,713 INFO L225 Difference]: With dead ends: 760 [2023-11-23 21:13:56,713 INFO L226 Difference]: Without dead ends: 550 [2023-11-23 21:13:56,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:13:56,722 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 68 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:56,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 586 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:13:56,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2023-11-23 21:13:56,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 546. [2023-11-23 21:13:56,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 401 states have (on average 1.366583541147132) internal successors, (548), 406 states have internal predecessors, (548), 88 states have call successors, (88), 57 states have call predecessors, (88), 55 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2023-11-23 21:13:56,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 720 transitions. [2023-11-23 21:13:56,786 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 720 transitions. Word has length 47 [2023-11-23 21:13:56,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:56,788 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 720 transitions. [2023-11-23 21:13:56,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:13:56,788 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 720 transitions. [2023-11-23 21:13:56,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-23 21:13:56,794 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:56,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:56,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:13:56,795 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:56,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:56,796 INFO L85 PathProgramCache]: Analyzing trace with hash 83166948, now seen corresponding path program 1 times [2023-11-23 21:13:56,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:56,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327466620] [2023-11-23 21:13:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:56,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:56,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:13:56,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:56,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327466620] [2023-11-23 21:13:56,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327466620] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:56,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:56,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:13:56,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738701828] [2023-11-23 21:13:56,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:56,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:13:56,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:56,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:13:56,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:13:56,897 INFO L87 Difference]: Start difference. First operand 546 states and 720 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:13:57,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:57,065 INFO L93 Difference]: Finished difference Result 970 states and 1242 transitions. [2023-11-23 21:13:57,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:13:57,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2023-11-23 21:13:57,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:57,071 INFO L225 Difference]: With dead ends: 970 [2023-11-23 21:13:57,071 INFO L226 Difference]: Without dead ends: 609 [2023-11-23 21:13:57,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:13:57,080 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 336 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:57,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 372 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:13:57,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2023-11-23 21:13:57,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 597. [2023-11-23 21:13:57,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 437 states have (on average 1.3501144164759726) internal successors, (590), 442 states have internal predecessors, (590), 96 states have call successors, (96), 64 states have call predecessors, (96), 62 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2023-11-23 21:13:57,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 778 transitions. [2023-11-23 21:13:57,147 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 778 transitions. Word has length 53 [2023-11-23 21:13:57,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:57,148 INFO L495 AbstractCegarLoop]: Abstraction has 597 states and 778 transitions. [2023-11-23 21:13:57,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:13:57,148 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 778 transitions. [2023-11-23 21:13:57,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-23 21:13:57,150 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:57,150 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:57,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:13:57,151 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:57,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:57,151 INFO L85 PathProgramCache]: Analyzing trace with hash 2061354029, now seen corresponding path program 1 times [2023-11-23 21:13:57,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:57,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177156396] [2023-11-23 21:13:57,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:57,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:57,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:57,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:13:57,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:57,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177156396] [2023-11-23 21:13:57,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177156396] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:57,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:57,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:13:57,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712311176] [2023-11-23 21:13:57,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:57,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:13:57,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:57,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:13:57,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:13:57,288 INFO L87 Difference]: Start difference. First operand 597 states and 778 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-23 21:13:57,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:57,682 INFO L93 Difference]: Finished difference Result 706 states and 910 transitions. [2023-11-23 21:13:57,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:13:57,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2023-11-23 21:13:57,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:57,689 INFO L225 Difference]: With dead ends: 706 [2023-11-23 21:13:57,689 INFO L226 Difference]: Without dead ends: 703 [2023-11-23 21:13:57,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:13:57,691 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 606 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:57,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 351 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:13:57,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2023-11-23 21:13:57,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 596. [2023-11-23 21:13:57,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 437 states have (on average 1.3432494279176201) internal successors, (587), 441 states have internal predecessors, (587), 95 states have call successors, (95), 64 states have call predecessors, (95), 62 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2023-11-23 21:13:57,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 774 transitions. [2023-11-23 21:13:57,775 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 774 transitions. Word has length 54 [2023-11-23 21:13:57,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:57,775 INFO L495 AbstractCegarLoop]: Abstraction has 596 states and 774 transitions. [2023-11-23 21:13:57,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-23 21:13:57,776 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 774 transitions. [2023-11-23 21:13:57,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-23 21:13:57,777 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:57,777 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:57,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:13:57,778 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:57,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:57,779 INFO L85 PathProgramCache]: Analyzing trace with hash -523859890, now seen corresponding path program 1 times [2023-11-23 21:13:57,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:57,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661640089] [2023-11-23 21:13:57,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:57,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:13:57,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:57,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661640089] [2023-11-23 21:13:57,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661640089] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:13:57,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767910253] [2023-11-23 21:13:57,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:57,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:57,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f9f951-8a27-40fa-9259-6c98eb5665f5/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:13:57,988 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f9f951-8a27-40fa-9259-6c98eb5665f5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:13:58,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f9f951-8a27-40fa-9259-6c98eb5665f5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:13:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:58,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:13:58,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:13:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:13:58,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:13:58,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:13:58,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767910253] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:13:58,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1958373964] [2023-11-23 21:13:58,593 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-11-23 21:13:58,594 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:13:58,598 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:13:58,603 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:13:58,604 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:14:07,638 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 191 for LOIs [2023-11-23 21:14:07,730 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 187 for LOIs [2023-11-23 21:14:07,824 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 195 for LOIs [2023-11-23 21:14:09,322 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 191 for LOIs [2023-11-23 21:14:09,696 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 191 for LOIs [2023-11-23 21:14:10,038 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 191 for LOIs [2023-11-23 21:14:10,129 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 198 for LOIs [2023-11-23 21:14:10,219 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:14:38,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1958373964] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:14:38,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:14:38,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [5, 5, 4] total 41 [2023-11-23 21:14:38,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121840929] [2023-11-23 21:14:38,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:14:38,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-23 21:14:38,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:14:38,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-23 21:14:38,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2023-11-23 21:14:38,009 INFO L87 Difference]: Start difference. First operand 596 states and 774 transitions. Second operand has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7)