./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.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_342b8d15-9a4c-4c2d-8562-f44471c5773a/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342b8d15-9a4c-4c2d-8562-f44471c5773a/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_342b8d15-9a4c-4c2d-8562-f44471c5773a/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342b8d15-9a4c-4c2d-8562-f44471c5773a/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342b8d15-9a4c-4c2d-8562-f44471c5773a/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_342b8d15-9a4c-4c2d-8562-f44471c5773a/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 dfe43dac9acec5d21450031b4b25696c02a17019cbc94a74a969e06371e0741b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:33:55,508 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:33:55,649 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342b8d15-9a4c-4c2d-8562-f44471c5773a/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:33:55,658 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:33:55,659 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:33:55,704 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:33:55,705 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:33:55,706 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:33:55,707 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:33:55,712 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:33:55,712 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:33:55,713 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:33:55,713 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:33:55,715 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:33:55,716 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:33:55,716 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:33:55,717 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:33:55,717 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:33:55,718 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:33:55,718 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:33:55,719 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:33:55,719 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:33:55,721 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:33:55,721 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:33:55,722 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:33:55,722 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:33:55,723 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:33:55,723 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:33:55,724 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:33:55,724 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:33:55,726 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:33:55,726 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:33:55,726 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:33:55,727 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:33:55,727 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:33:55,727 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:33:55,728 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:33:55,728 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:33:55,728 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:33:55,729 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:33:55,729 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:33:55,730 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:33:55,730 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:33:55,730 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:33:55,731 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:33:55,731 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:33:55,732 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:33:55,732 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_342b8d15-9a4c-4c2d-8562-f44471c5773a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342b8d15-9a4c-4c2d-8562-f44471c5773a/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfe43dac9acec5d21450031b4b25696c02a17019cbc94a74a969e06371e0741b [2023-11-23 20:33:56,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:33:56,103 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:33:56,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:33:56,109 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:33:56,109 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:33:56,110 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342b8d15-9a4c-4c2d-8562-f44471c5773a/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c [2023-11-23 20:33:59,084 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:33:59,404 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:33:59,404 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342b8d15-9a4c-4c2d-8562-f44471c5773a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c [2023-11-23 20:33:59,437 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342b8d15-9a4c-4c2d-8562-f44471c5773a/bin/utaipan-verify-mE87zJ7Ire/data/d0615979d/4c531b9f1941430a9fe0abf14eee648c/FLAGd5525f9ae [2023-11-23 20:33:59,455 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342b8d15-9a4c-4c2d-8562-f44471c5773a/bin/utaipan-verify-mE87zJ7Ire/data/d0615979d/4c531b9f1941430a9fe0abf14eee648c [2023-11-23 20:33:59,461 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:33:59,463 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:33:59,467 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:33:59,467 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:33:59,473 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:33:59,474 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:59" (1/1) ... [2023-11-23 20:33:59,475 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d00c44e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:59, skipping insertion in model container [2023-11-23 20:33:59,476 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:59" (1/1) ... [2023-11-23 20:33:59,540 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:33:59,703 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_342b8d15-9a4c-4c2d-8562-f44471c5773a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[914,927] [2023-11-23 20:33:59,763 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_342b8d15-9a4c-4c2d-8562-f44471c5773a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[7115,7128] [2023-11-23 20:33:59,905 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:33:59,924 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:33:59,942 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_342b8d15-9a4c-4c2d-8562-f44471c5773a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[914,927] [2023-11-23 20:33:59,960 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_342b8d15-9a4c-4c2d-8562-f44471c5773a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[7115,7128] [2023-11-23 20:34:00,008 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:34:00,035 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:34:00,036 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:00 WrapperNode [2023-11-23 20:34:00,036 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:34:00,037 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:34:00,037 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:34:00,037 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:34:00,045 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:00" (1/1) ... [2023-11-23 20:34:00,061 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:00" (1/1) ... [2023-11-23 20:34:00,128 INFO L138 Inliner]: procedures = 69, calls = 82, calls flagged for inlining = 37, calls inlined = 37, statements flattened = 836 [2023-11-23 20:34:00,128 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:34:00,129 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:34:00,129 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:34:00,129 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:34:00,153 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:00" (1/1) ... [2023-11-23 20:34:00,153 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:00" (1/1) ... [2023-11-23 20:34:00,158 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:00" (1/1) ... [2023-11-23 20:34:00,159 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:00" (1/1) ... [2023-11-23 20:34:00,176 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:00" (1/1) ... [2023-11-23 20:34:00,190 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:00" (1/1) ... [2023-11-23 20:34:00,194 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:00" (1/1) ... [2023-11-23 20:34:00,198 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:00" (1/1) ... [2023-11-23 20:34:00,205 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:34:00,206 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:34:00,206 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:34:00,206 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:34:00,207 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:00" (1/1) ... [2023-11-23 20:34:00,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:34:00,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342b8d15-9a4c-4c2d-8562-f44471c5773a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:34:00,241 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342b8d15-9a4c-4c2d-8562-f44471c5773a/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:34:00,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342b8d15-9a4c-4c2d-8562-f44471c5773a/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:34:00,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:34:00,307 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-23 20:34:00,308 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-23 20:34:00,308 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-11-23 20:34:00,308 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-11-23 20:34:00,309 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-23 20:34:00,309 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-23 20:34:00,309 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-23 20:34:00,309 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-23 20:34:00,309 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-11-23 20:34:00,309 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-11-23 20:34:00,310 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-23 20:34:00,310 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-23 20:34:00,310 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-23 20:34:00,311 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-23 20:34:00,311 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-11-23 20:34:00,312 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-11-23 20:34:00,312 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-11-23 20:34:00,312 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-11-23 20:34:00,312 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-11-23 20:34:00,313 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-11-23 20:34:00,314 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-23 20:34:00,314 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-23 20:34:00,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:34:00,315 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-23 20:34:00,315 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-23 20:34:00,315 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-11-23 20:34:00,315 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-11-23 20:34:00,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:34:00,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:34:00,316 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-23 20:34:00,316 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-23 20:34:00,316 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2023-11-23 20:34:00,317 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2023-11-23 20:34:00,479 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:34:00,481 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:34:01,430 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:34:01,916 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:34:01,916 INFO L309 CfgBuilder]: Removed 15 assume(true) statements. [2023-11-23 20:34:01,918 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:34:01 BoogieIcfgContainer [2023-11-23 20:34:01,918 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:34:01,921 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:34:01,922 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:34:01,925 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:34:01,925 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:33:59" (1/3) ... [2023-11-23 20:34:01,926 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5de17957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:34:01, skipping insertion in model container [2023-11-23 20:34:01,926 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:00" (2/3) ... [2023-11-23 20:34:01,928 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5de17957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:34:01, skipping insertion in model container [2023-11-23 20:34:01,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:34:01" (3/3) ... [2023-11-23 20:34:01,930 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.08.cil-2.c [2023-11-23 20:34:01,949 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:34:01,949 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 20:34:02,013 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:34:02,019 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;@233ae6f2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:34:02,021 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 20:34:02,025 INFO L276 IsEmpty]: Start isEmpty. Operand has 231 states, 175 states have (on average 1.5085714285714287) internal successors, (264), 183 states have internal predecessors, (264), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2023-11-23 20:34:02,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-23 20:34:02,037 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:02,037 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 20:34:02,038 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:02,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:02,044 INFO L85 PathProgramCache]: Analyzing trace with hash 80657644, now seen corresponding path program 1 times [2023-11-23 20:34:02,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:02,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950415739] [2023-11-23 20:34:02,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:02,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:02,473 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 20:34:02,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:02,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950415739] [2023-11-23 20:34:02,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950415739] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:02,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:02,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 20:34:02,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286628240] [2023-11-23 20:34:02,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:02,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:34:02,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:02,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:34:02,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:34:02,531 INFO L87 Difference]: Start difference. First operand has 231 states, 175 states have (on average 1.5085714285714287) internal successors, (264), 183 states have internal predecessors, (264), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) 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) [2023-11-23 20:34:03,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:03,605 INFO L93 Difference]: Finished difference Result 881 states and 1278 transitions. [2023-11-23 20:34:03,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 20:34:03,608 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 [2023-11-23 20:34:03,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:03,642 INFO L225 Difference]: With dead ends: 881 [2023-11-23 20:34:03,642 INFO L226 Difference]: Without dead ends: 636 [2023-11-23 20:34:03,653 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 [2023-11-23 20:34:03,657 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 970 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:03,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [977 Valid, 1023 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 20:34:03,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2023-11-23 20:34:03,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 565. [2023-11-23 20:34:03,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 409 states have (on average 1.3422982885085575) internal successors, (549), 414 states have internal predecessors, (549), 93 states have call successors, (93), 63 states have call predecessors, (93), 61 states have return successors, (104), 89 states have call predecessors, (104), 89 states have call successors, (104) [2023-11-23 20:34:03,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 746 transitions. [2023-11-23 20:34:03,840 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 746 transitions. Word has length 45 [2023-11-23 20:34:03,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:03,840 INFO L495 AbstractCegarLoop]: Abstraction has 565 states and 746 transitions. [2023-11-23 20:34:03,841 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) [2023-11-23 20:34:03,841 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 746 transitions. [2023-11-23 20:34:03,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-23 20:34:03,849 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:03,850 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 20:34:03,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:34:03,850 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:03,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:03,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1479734019, now seen corresponding path program 1 times [2023-11-23 20:34:03,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:03,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790147892] [2023-11-23 20:34:03,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:03,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:03,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:04,195 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 20:34:04,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:04,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790147892] [2023-11-23 20:34:04,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790147892] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:04,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:04,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 20:34:04,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569747166] [2023-11-23 20:34:04,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:04,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 20:34:04,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:04,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 20:34:04,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:34:04,206 INFO L87 Difference]: Start difference. First operand 565 states and 746 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) [2023-11-23 20:34:05,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:05,059 INFO L93 Difference]: Finished difference Result 1326 states and 1693 transitions. [2023-11-23 20:34:05,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 20:34:05,060 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 [2023-11-23 20:34:05,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:05,068 INFO L225 Difference]: With dead ends: 1326 [2023-11-23 20:34:05,068 INFO L226 Difference]: Without dead ends: 923 [2023-11-23 20:34:05,070 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 [2023-11-23 20:34:05,071 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 466 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:05,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 856 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 20:34:05,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2023-11-23 20:34:05,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 894. [2023-11-23 20:34:05,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 632 states have (on average 1.2974683544303798) internal successors, (820), 638 states have internal predecessors, (820), 149 states have call successors, (149), 111 states have call predecessors, (149), 111 states have return successors, (178), 146 states have call predecessors, (178), 145 states have call successors, (178) [2023-11-23 20:34:05,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1147 transitions. [2023-11-23 20:34:05,192 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1147 transitions. Word has length 46 [2023-11-23 20:34:05,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:05,192 INFO L495 AbstractCegarLoop]: Abstraction has 894 states and 1147 transitions. [2023-11-23 20:34:05,193 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) [2023-11-23 20:34:05,194 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1147 transitions. [2023-11-23 20:34:05,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 20:34:05,201 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:05,201 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 20:34:05,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:34:05,202 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:05,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:05,212 INFO L85 PathProgramCache]: Analyzing trace with hash -690096465, now seen corresponding path program 1 times [2023-11-23 20:34:05,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:05,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696380767] [2023-11-23 20:34:05,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:05,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:05,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:05,308 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 20:34:05,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:05,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696380767] [2023-11-23 20:34:05,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696380767] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:05,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:05,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:34:05,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742674348] [2023-11-23 20:34:05,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:05,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:34:05,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:05,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:34:05,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:34:05,312 INFO L87 Difference]: Start difference. First operand 894 states and 1147 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 20:34:05,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:05,519 INFO L93 Difference]: Finished difference Result 1835 states and 2306 transitions. [2023-11-23 20:34:05,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:34:05,520 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 20:34:05,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:05,531 INFO L225 Difference]: With dead ends: 1835 [2023-11-23 20:34:05,531 INFO L226 Difference]: Without dead ends: 1153 [2023-11-23 20:34:05,535 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 20:34:05,541 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 68 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:05,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 528 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:34:05,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2023-11-23 20:34:05,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1131. [2023-11-23 20:34:05,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 793 states have (on average 1.278688524590164) internal successors, (1014), 799 states have internal predecessors, (1014), 191 states have call successors, (191), 149 states have call predecessors, (191), 145 states have return successors, (224), 184 states have call predecessors, (224), 187 states have call successors, (224) [2023-11-23 20:34:05,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1429 transitions. [2023-11-23 20:34:05,688 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1429 transitions. Word has length 47 [2023-11-23 20:34:05,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:05,689 INFO L495 AbstractCegarLoop]: Abstraction has 1131 states and 1429 transitions. [2023-11-23 20:34:05,689 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 20:34:05,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1429 transitions. [2023-11-23 20:34:05,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-23 20:34:05,693 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:05,693 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] [2023-11-23 20:34:05,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:34:05,694 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:05,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:05,695 INFO L85 PathProgramCache]: Analyzing trace with hash 466331983, now seen corresponding path program 1 times [2023-11-23 20:34:05,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:05,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988209486] [2023-11-23 20:34:05,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:05,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:05,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:05,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:34:05,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:05,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988209486] [2023-11-23 20:34:05,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988209486] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:05,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:05,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:34:05,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329936498] [2023-11-23 20:34:05,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:05,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:34:05,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:05,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:34:05,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:34:05,795 INFO L87 Difference]: Start difference. First operand 1131 states and 1429 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) [2023-11-23 20:34:05,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:05,962 INFO L93 Difference]: Finished difference Result 1537 states and 1919 transitions. [2023-11-23 20:34:05,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:34:05,963 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 [2023-11-23 20:34:05,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:05,971 INFO L225 Difference]: With dead ends: 1537 [2023-11-23 20:34:05,972 INFO L226 Difference]: Without dead ends: 982 [2023-11-23 20:34:05,974 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 20:34:05,980 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 292 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:05,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 341 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:34:05,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2023-11-23 20:34:06,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 776. [2023-11-23 20:34:06,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 557 states have (on average 1.2764811490125674) internal successors, (711), 562 states have internal predecessors, (711), 128 states have call successors, (128), 95 states have call predecessors, (128), 89 states have return successors, (132), 120 states have call predecessors, (132), 124 states have call successors, (132) [2023-11-23 20:34:06,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 971 transitions. [2023-11-23 20:34:06,078 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 971 transitions. Word has length 53 [2023-11-23 20:34:06,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:06,079 INFO L495 AbstractCegarLoop]: Abstraction has 776 states and 971 transitions. [2023-11-23 20:34:06,079 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) [2023-11-23 20:34:06,079 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 971 transitions. [2023-11-23 20:34:06,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-23 20:34:06,081 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:06,081 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 20:34:06,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:34:06,082 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:06,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:06,082 INFO L85 PathProgramCache]: Analyzing trace with hash -88047839, now seen corresponding path program 1 times [2023-11-23 20:34:06,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:06,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067111651] [2023-11-23 20:34:06,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:06,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:06,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:06,225 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 20:34:06,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:06,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067111651] [2023-11-23 20:34:06,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067111651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:06,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:06,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:34:06,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305199751] [2023-11-23 20:34:06,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:06,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:34:06,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:06,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:34:06,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:34:06,229 INFO L87 Difference]: Start difference. First operand 776 states and 971 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 20:34:06,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:06,595 INFO L93 Difference]: Finished difference Result 1031 states and 1272 transitions. [2023-11-23 20:34:06,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:34:06,595 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 20:34:06,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:06,602 INFO L225 Difference]: With dead ends: 1031 [2023-11-23 20:34:06,603 INFO L226 Difference]: Without dead ends: 1028 [2023-11-23 20:34:06,604 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 20:34:06,606 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 535 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:06,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 317 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:34:06,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2023-11-23 20:34:06,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 775. [2023-11-23 20:34:06,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 557 states have (on average 1.2657091561938958) internal successors, (705), 561 states have internal predecessors, (705), 127 states have call successors, (127), 95 states have call predecessors, (127), 89 states have return successors, (132), 120 states have call predecessors, (132), 124 states have call successors, (132) [2023-11-23 20:34:06,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 964 transitions. [2023-11-23 20:34:06,708 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 964 transitions. Word has length 54 [2023-11-23 20:34:06,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:06,711 INFO L495 AbstractCegarLoop]: Abstraction has 775 states and 964 transitions. [2023-11-23 20:34:06,712 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 20:34:06,712 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 964 transitions. [2023-11-23 20:34:06,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-23 20:34:06,714 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:06,714 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 20:34:06,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 20:34:06,715 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:06,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:06,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1564307608, now seen corresponding path program 1 times [2023-11-23 20:34:06,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:06,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623687823] [2023-11-23 20:34:06,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:06,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:06,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:06,918 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 20:34:06,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:06,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623687823] [2023-11-23 20:34:06,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623687823] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:34:06,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420434063] [2023-11-23 20:34:06,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:06,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:06,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342b8d15-9a4c-4c2d-8562-f44471c5773a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:34:06,927 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342b8d15-9a4c-4c2d-8562-f44471c5773a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:34:06,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342b8d15-9a4c-4c2d-8562-f44471c5773a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:34:07,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:07,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 20:34:07,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:34:07,369 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 20:34:07,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:34:07,461 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 20:34:07,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420434063] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:34:07,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [986788256] [2023-11-23 20:34:07,484 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-11-23 20:34:07,485 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:34:07,491 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:34:07,497 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:34:07,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:34:14,359 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 171 for LOIs [2023-11-23 20:34:14,474 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 167 for LOIs [2023-11-23 20:34:14,588 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 175 for LOIs [2023-11-23 20:34:15,748 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 171 for LOIs [2023-11-23 20:34:15,973 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 171 for LOIs [2023-11-23 20:34:16,216 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 171 for LOIs [2023-11-23 20:34:16,290 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 178 for LOIs [2023-11-23 20:34:16,388 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:34:38,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [986788256] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:38,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:34:38,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [5, 5, 4] total 41 [2023-11-23 20:34:38,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203604627] [2023-11-23 20:34:38,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:38,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-23 20:34:38,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:38,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-23 20:34:38,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2023-11-23 20:34:38,909 INFO L87 Difference]: Start difference. First operand 775 states and 964 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)