./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_970bc9ef-cff5-40bc-a053-9ff5d1871e16/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_970bc9ef-cff5-40bc-a053-9ff5d1871e16/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_970bc9ef-cff5-40bc-a053-9ff5d1871e16/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_970bc9ef-cff5-40bc-a053-9ff5d1871e16/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_970bc9ef-cff5-40bc-a053-9ff5d1871e16/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_970bc9ef-cff5-40bc-a053-9ff5d1871e16/bin/utaipan-verify-t7M7D8N6sZ --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 ce176716d91d866602a372020396224af9fcf4c5f81c6adcdcc0f1d83b0d658f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:16:26,092 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:16:26,216 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_970bc9ef-cff5-40bc-a053-9ff5d1871e16/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:16:26,221 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:16:26,221 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:16:26,252 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:16:26,253 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:16:26,254 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:16:26,255 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:16:26,260 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:16:26,261 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:16:26,262 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:16:26,263 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:16:26,264 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:16:26,265 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:16:26,265 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:16:26,266 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:16:26,266 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:16:26,267 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:16:26,267 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:16:26,268 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:16:26,268 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:16:26,270 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:16:26,270 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:16:26,271 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:16:26,271 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:16:26,272 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:16:26,272 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:16:26,272 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:16:26,273 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:16:26,274 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:16:26,274 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:16:26,275 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:16:26,275 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:16:26,275 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:16:26,276 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:16:26,276 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:16:26,276 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:16:26,276 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:16:26,277 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:16:26,277 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:16:26,277 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:16:26,278 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:16:26,278 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:16:26,278 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:16:26,279 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_970bc9ef-cff5-40bc-a053-9ff5d1871e16/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_970bc9ef-cff5-40bc-a053-9ff5d1871e16/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce176716d91d866602a372020396224af9fcf4c5f81c6adcdcc0f1d83b0d658f [2023-11-19 04:16:26,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:16:26,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:16:26,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:16:26,612 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:16:26,613 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:16:26,614 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_970bc9ef-cff5-40bc-a053-9ff5d1871e16/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c [2023-11-19 04:16:29,792 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:16:30,023 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:16:30,024 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_970bc9ef-cff5-40bc-a053-9ff5d1871e16/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c [2023-11-19 04:16:30,054 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_970bc9ef-cff5-40bc-a053-9ff5d1871e16/bin/utaipan-verify-t7M7D8N6sZ/data/31c835d45/91585015930545b38da97f117d5cdcd7/FLAG4d606d61c [2023-11-19 04:16:30,072 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_970bc9ef-cff5-40bc-a053-9ff5d1871e16/bin/utaipan-verify-t7M7D8N6sZ/data/31c835d45/91585015930545b38da97f117d5cdcd7 [2023-11-19 04:16:30,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:16:30,081 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:16:30,084 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:16:30,084 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:16:30,089 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:16:30,090 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:16:30" (1/1) ... [2023-11-19 04:16:30,091 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b7c80d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:16:30, skipping insertion in model container [2023-11-19 04:16:30,091 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:16:30" (1/1) ... [2023-11-19 04:16:30,179 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:16:30,377 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_970bc9ef-cff5-40bc-a053-9ff5d1871e16/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c[914,927] [2023-11-19 04:16:30,454 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_970bc9ef-cff5-40bc-a053-9ff5d1871e16/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c[7115,7128] [2023-11-19 04:16:30,610 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:16:30,631 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:16:30,647 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_970bc9ef-cff5-40bc-a053-9ff5d1871e16/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c[914,927] [2023-11-19 04:16:30,675 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_970bc9ef-cff5-40bc-a053-9ff5d1871e16/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c[7115,7128] [2023-11-19 04:16:30,781 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:16:30,811 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:16:30,812 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:16:30 WrapperNode [2023-11-19 04:16:30,812 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:16:30,814 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:16:30,814 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:16:30,814 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:16:30,822 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:16:30" (1/1) ... [2023-11-19 04:16:30,840 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:16:30" (1/1) ... [2023-11-19 04:16:30,925 INFO L138 Inliner]: procedures = 79, calls = 97, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 1136 [2023-11-19 04:16:30,926 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:16:30,927 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:16:30,928 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:16:30,928 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:16:30,953 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:16:30" (1/1) ... [2023-11-19 04:16:30,953 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:16:30" (1/1) ... [2023-11-19 04:16:30,957 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:16:30" (1/1) ... [2023-11-19 04:16:30,957 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:16:30" (1/1) ... [2023-11-19 04:16:30,980 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:16:30" (1/1) ... [2023-11-19 04:16:31,003 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:16:30" (1/1) ... [2023-11-19 04:16:31,010 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:16:30" (1/1) ... [2023-11-19 04:16:31,015 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:16:30" (1/1) ... [2023-11-19 04:16:31,032 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:16:31,033 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:16:31,034 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:16:31,034 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:16:31,035 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:16:30" (1/1) ... [2023-11-19 04:16:31,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:16:31,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_970bc9ef-cff5-40bc-a053-9ff5d1871e16/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:16:31,097 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_970bc9ef-cff5-40bc-a053-9ff5d1871e16/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:16:31,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_970bc9ef-cff5-40bc-a053-9ff5d1871e16/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:16:31,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:16:31,144 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-19 04:16:31,144 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-19 04:16:31,146 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-11-19 04:16:31,147 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-11-19 04:16:31,147 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-19 04:16:31,147 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-19 04:16:31,147 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-19 04:16:31,147 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-19 04:16:31,147 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-11-19 04:16:31,147 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-11-19 04:16:31,148 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-19 04:16:31,148 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-19 04:16:31,148 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-19 04:16:31,148 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-19 04:16:31,148 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-11-19 04:16:31,149 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-11-19 04:16:31,149 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-11-19 04:16:31,150 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-11-19 04:16:31,150 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-11-19 04:16:31,150 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-11-19 04:16:31,150 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-19 04:16:31,151 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-19 04:16:31,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:16:31,152 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-19 04:16:31,152 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-19 04:16:31,152 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-11-19 04:16:31,153 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-11-19 04:16:31,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:16:31,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:16:31,153 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-19 04:16:31,154 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-19 04:16:31,154 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2023-11-19 04:16:31,154 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2023-11-19 04:16:31,352 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:16:31,354 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:16:32,577 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:16:33,412 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:16:33,412 INFO L302 CfgBuilder]: Removed 20 assume(true) statements. [2023-11-19 04:16:33,429 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:16:33 BoogieIcfgContainer [2023-11-19 04:16:33,429 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:16:33,434 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:16:33,434 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:16:33,437 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:16:33,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:16:30" (1/3) ... [2023-11-19 04:16:33,439 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b609d45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:16:33, skipping insertion in model container [2023-11-19 04:16:33,439 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:16:30" (2/3) ... [2023-11-19 04:16:33,441 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b609d45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:16:33, skipping insertion in model container [2023-11-19 04:16:33,441 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:16:33" (3/3) ... [2023-11-19 04:16:33,443 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.13.cil-1.c [2023-11-19 04:16:33,466 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:16:33,466 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 04:16:33,559 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:16:33,569 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;@44721c88, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:16:33,569 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 04:16:33,577 INFO L276 IsEmpty]: Start isEmpty. Operand has 291 states, 230 states have (on average 1.517391304347826) internal successors, (349), 238 states have internal predecessors, (349), 43 states have call successors, (43), 15 states have call predecessors, (43), 15 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2023-11-19 04:16:33,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 04:16:33,594 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:16:33,595 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] [2023-11-19 04:16:33,596 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:16:33,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:16:33,604 INFO L85 PathProgramCache]: Analyzing trace with hash 966128718, now seen corresponding path program 1 times [2023-11-19 04:16:33,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:16:33,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377193026] [2023-11-19 04:16:33,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:16:33,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:16:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:16:34,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:16:34,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:16:34,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377193026] [2023-11-19 04:16:34,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377193026] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:16:34,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:16:34,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:16:34,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124938409] [2023-11-19 04:16:34,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:16:34,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:16:34,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:16:34,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:16:34,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:16:34,333 INFO L87 Difference]: Start difference. First operand has 291 states, 230 states have (on average 1.517391304347826) internal successors, (349), 238 states have internal predecessors, (349), 43 states have call successors, (43), 15 states have call predecessors, (43), 15 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-19 04:16:35,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:16:35,593 INFO L93 Difference]: Finished difference Result 1001 states and 1468 transitions. [2023-11-19 04:16:35,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 04:16:35,600 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2023-11-19 04:16:35,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:16:35,620 INFO L225 Difference]: With dead ends: 1001 [2023-11-19 04:16:35,620 INFO L226 Difference]: Without dead ends: 696 [2023-11-19 04:16:35,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-19 04:16:35,630 INFO L413 NwaCegarLoop]: 474 mSDtfsCounter, 1140 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1147 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 04:16:35,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1147 Valid, 1245 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 04:16:35,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2023-11-19 04:16:35,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 625. [2023-11-19 04:16:35,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 464 states have (on average 1.3663793103448276) internal successors, (634), 469 states have internal predecessors, (634), 98 states have call successors, (98), 63 states have call predecessors, (98), 61 states have return successors, (109), 94 states have call predecessors, (109), 94 states have call successors, (109) [2023-11-19 04:16:35,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 841 transitions. [2023-11-19 04:16:35,751 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 841 transitions. Word has length 45 [2023-11-19 04:16:35,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:16:35,752 INFO L495 AbstractCegarLoop]: Abstraction has 625 states and 841 transitions. [2023-11-19 04:16:35,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-19 04:16:35,753 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 841 transitions. [2023-11-19 04:16:35,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-19 04:16:35,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:16:35,756 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] [2023-11-19 04:16:35,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:16:35,757 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:16:35,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:16:35,757 INFO L85 PathProgramCache]: Analyzing trace with hash 497840111, now seen corresponding path program 1 times [2023-11-19 04:16:35,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:16:35,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597738715] [2023-11-19 04:16:35,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:16:35,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:16:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:16:36,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:16:36,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:16:36,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597738715] [2023-11-19 04:16:36,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597738715] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:16:36,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:16:36,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 04:16:36,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495356308] [2023-11-19 04:16:36,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:16:36,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 04:16:36,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:16:36,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 04:16:36,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:16:36,180 INFO L87 Difference]: Start difference. First operand 625 states and 841 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-19 04:16:37,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:16:37,382 INFO L93 Difference]: Finished difference Result 1386 states and 1788 transitions. [2023-11-19 04:16:37,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 04:16:37,383 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2023-11-19 04:16:37,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:16:37,400 INFO L225 Difference]: With dead ends: 1386 [2023-11-19 04:16:37,400 INFO L226 Difference]: Without dead ends: 983 [2023-11-19 04:16:37,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-19 04:16:37,408 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 586 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 04:16:37,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 1101 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1064 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 04:16:37,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2023-11-19 04:16:37,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 954. [2023-11-19 04:16:37,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 687 states have (on average 1.3173216885007277) internal successors, (905), 693 states have internal predecessors, (905), 154 states have call successors, (154), 111 states have call predecessors, (154), 111 states have return successors, (183), 151 states have call predecessors, (183), 150 states have call successors, (183) [2023-11-19 04:16:37,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1242 transitions. [2023-11-19 04:16:37,594 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1242 transitions. Word has length 46 [2023-11-19 04:16:37,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:16:37,594 INFO L495 AbstractCegarLoop]: Abstraction has 954 states and 1242 transitions. [2023-11-19 04:16:37,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-19 04:16:37,595 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1242 transitions. [2023-11-19 04:16:37,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-19 04:16:37,605 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:16:37,608 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] [2023-11-19 04:16:37,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:16:37,609 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:16:37,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:16:37,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1064408216, now seen corresponding path program 1 times [2023-11-19 04:16:37,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:16:37,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950156621] [2023-11-19 04:16:37,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:16:37,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:16:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:16:37,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:16:37,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:16:37,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950156621] [2023-11-19 04:16:37,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950156621] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:16:37,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:16:37,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:16:37,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073288361] [2023-11-19 04:16:37,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:16:37,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:16:37,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:16:37,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:16:37,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:16:37,714 INFO L87 Difference]: Start difference. First operand 954 states and 1242 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) [2023-11-19 04:16:38,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:16:38,058 INFO L93 Difference]: Finished difference Result 1895 states and 2401 transitions. [2023-11-19 04:16:38,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:16:38,059 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 [2023-11-19 04:16:38,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:16:38,068 INFO L225 Difference]: With dead ends: 1895 [2023-11-19 04:16:38,068 INFO L226 Difference]: Without dead ends: 1213 [2023-11-19 04:16:38,070 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 [2023-11-19 04:16:38,072 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 68 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:16:38,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 688 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:16:38,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2023-11-19 04:16:38,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1191. [2023-11-19 04:16:38,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 848 states have (on average 1.2959905660377358) internal successors, (1099), 854 states have internal predecessors, (1099), 196 states have call successors, (196), 149 states have call predecessors, (196), 145 states have return successors, (229), 189 states have call predecessors, (229), 192 states have call successors, (229) [2023-11-19 04:16:38,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 1524 transitions. [2023-11-19 04:16:38,213 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 1524 transitions. Word has length 47 [2023-11-19 04:16:38,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:16:38,214 INFO L495 AbstractCegarLoop]: Abstraction has 1191 states and 1524 transitions. [2023-11-19 04:16:38,214 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) [2023-11-19 04:16:38,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 1524 transitions. [2023-11-19 04:16:38,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-19 04:16:38,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:16:38,216 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:16:38,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:16:38,217 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:16:38,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:16:38,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1852466639, now seen corresponding path program 1 times [2023-11-19 04:16:38,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:16:38,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001193868] [2023-11-19 04:16:38,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:16:38,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:16:38,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:16:38,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:16:38,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:16:38,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001193868] [2023-11-19 04:16:38,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001193868] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:16:38,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:16:38,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:16:38,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635337250] [2023-11-19 04:16:38,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:16:38,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:16:38,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:16:38,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:16:38,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:16:38,290 INFO L87 Difference]: Start difference. First operand 1191 states and 1524 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:16:38,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:16:38,510 INFO L93 Difference]: Finished difference Result 1597 states and 2014 transitions. [2023-11-19 04:16:38,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:16:38,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2023-11-19 04:16:38,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:16:38,519 INFO L225 Difference]: With dead ends: 1597 [2023-11-19 04:16:38,519 INFO L226 Difference]: Without dead ends: 1042 [2023-11-19 04:16:38,521 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 [2023-11-19 04:16:38,522 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 387 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:16:38,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 421 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:16:38,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2023-11-19 04:16:38,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 836. [2023-11-19 04:16:38,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 612 states have (on average 1.3006535947712419) internal successors, (796), 617 states have internal predecessors, (796), 133 states have call successors, (133), 95 states have call predecessors, (133), 89 states have return successors, (137), 125 states have call predecessors, (137), 129 states have call successors, (137) [2023-11-19 04:16:38,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1066 transitions. [2023-11-19 04:16:38,609 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1066 transitions. Word has length 53 [2023-11-19 04:16:38,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:16:38,609 INFO L495 AbstractCegarLoop]: Abstraction has 836 states and 1066 transitions. [2023-11-19 04:16:38,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:16:38,610 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1066 transitions. [2023-11-19 04:16:38,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-19 04:16:38,611 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:16:38,611 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] [2023-11-19 04:16:38,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:16:38,612 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:16:38,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:16:38,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1618054515, now seen corresponding path program 1 times [2023-11-19 04:16:38,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:16:38,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864638528] [2023-11-19 04:16:38,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:16:38,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:16:38,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:16:38,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:16:38,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:16:38,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864638528] [2023-11-19 04:16:38,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864638528] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:16:38,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:16:38,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:16:38,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844762404] [2023-11-19 04:16:38,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:16:38,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:16:38,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:16:38,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:16:38,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:16:38,694 INFO L87 Difference]: Start difference. First operand 836 states and 1066 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) [2023-11-19 04:16:39,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:16:39,122 INFO L93 Difference]: Finished difference Result 1091 states and 1367 transitions. [2023-11-19 04:16:39,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:16:39,123 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 [2023-11-19 04:16:39,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:16:39,130 INFO L225 Difference]: With dead ends: 1091 [2023-11-19 04:16:39,131 INFO L226 Difference]: Without dead ends: 1088 [2023-11-19 04:16:39,132 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 [2023-11-19 04:16:39,133 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 705 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:16:39,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [705 Valid, 397 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:16:39,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2023-11-19 04:16:39,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 835. [2023-11-19 04:16:39,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 612 states have (on average 1.2908496732026145) internal successors, (790), 616 states have internal predecessors, (790), 132 states have call successors, (132), 95 states have call predecessors, (132), 89 states have return successors, (137), 125 states have call predecessors, (137), 129 states have call successors, (137) [2023-11-19 04:16:39,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1059 transitions. [2023-11-19 04:16:39,249 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1059 transitions. Word has length 54 [2023-11-19 04:16:39,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:16:39,250 INFO L495 AbstractCegarLoop]: Abstraction has 835 states and 1059 transitions. [2023-11-19 04:16:39,250 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) [2023-11-19 04:16:39,251 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1059 transitions. [2023-11-19 04:16:39,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-19 04:16:39,252 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:16:39,253 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] [2023-11-19 04:16:39,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:16:39,253 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:16:39,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:16:39,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1378369233, now seen corresponding path program 1 times [2023-11-19 04:16:39,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:16:39,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646636446] [2023-11-19 04:16:39,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:16:39,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:16:39,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:16:39,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:16:39,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:16:39,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646636446] [2023-11-19 04:16:39,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646636446] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:16:39,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225813693] [2023-11-19 04:16:39,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:16:39,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:16:39,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_970bc9ef-cff5-40bc-a053-9ff5d1871e16/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:16:39,416 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_970bc9ef-cff5-40bc-a053-9ff5d1871e16/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:16:39,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_970bc9ef-cff5-40bc-a053-9ff5d1871e16/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:16:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:16:39,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 04:16:39,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:16:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:16:39,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:16:40,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:16:40,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225813693] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:16:40,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [217438209] [2023-11-19 04:16:40,073 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-11-19 04:16:40,073 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:16:40,078 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:16:40,084 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:16:40,084 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:16:51,187 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 221 for LOIs [2023-11-19 04:16:51,357 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 217 for LOIs [2023-11-19 04:16:51,507 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 225 for LOIs [2023-11-19 04:16:54,081 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 221 for LOIs [2023-11-19 04:16:54,571 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 221 for LOIs [2023-11-19 04:16:55,016 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 221 for LOIs [2023-11-19 04:16:55,148 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 228 for LOIs [2023-11-19 04:16:55,298 INFO L180 IcfgInterpreter]: Interpretation finished