./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.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_0f1fdc80-ba0a-4866-bd84-7a342f27b15c/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1fdc80-ba0a-4866-bd84-7a342f27b15c/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_0f1fdc80-ba0a-4866-bd84-7a342f27b15c/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1fdc80-ba0a-4866-bd84-7a342f27b15c/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1fdc80-ba0a-4866-bd84-7a342f27b15c/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_0f1fdc80-ba0a-4866-bd84-7a342f27b15c/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 39b635cc2ab0f0d4f8e606a07f9fc2cea48a2218c52549f8b5aa54058d2e5b4b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:14:10,599 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:14:10,739 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1fdc80-ba0a-4866-bd84-7a342f27b15c/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:14:10,745 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:14:10,746 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:14:10,791 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:14:10,791 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:14:10,792 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:14:10,793 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:14:10,798 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:14:10,799 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:14:10,799 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:14:10,800 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:14:10,801 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:14:10,802 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:14:10,802 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:14:10,803 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:14:10,803 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:14:10,804 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:14:10,804 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:14:10,805 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:14:10,806 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:14:10,807 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:14:10,807 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:14:10,808 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:14:10,808 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:14:10,809 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:14:10,809 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:14:10,810 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:14:10,810 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:14:10,812 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:14:10,812 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:14:10,812 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:14:10,813 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:14:10,813 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:14:10,813 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:14:10,814 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:14:10,814 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:14:10,814 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:14:10,815 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:14:10,815 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:14:10,816 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:14:10,816 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:14:10,816 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:14:10,817 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:14:10,817 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:14:10,818 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:14:10,818 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_0f1fdc80-ba0a-4866-bd84-7a342f27b15c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1fdc80-ba0a-4866-bd84-7a342f27b15c/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39b635cc2ab0f0d4f8e606a07f9fc2cea48a2218c52549f8b5aa54058d2e5b4b [2023-11-23 21:14:11,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:14:11,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:14:11,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:14:11,192 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:14:11,193 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:14:11,194 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1fdc80-ba0a-4866-bd84-7a342f27b15c/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-2.c [2023-11-23 21:14:14,307 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:14:14,589 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:14:14,590 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1fdc80-ba0a-4866-bd84-7a342f27b15c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-2.c [2023-11-23 21:14:14,618 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1fdc80-ba0a-4866-bd84-7a342f27b15c/bin/utaipan-verify-mE87zJ7Ire/data/8dfcea126/c9a0c77814324f41a8c7d76f780ef14d/FLAGda154e063 [2023-11-23 21:14:14,633 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1fdc80-ba0a-4866-bd84-7a342f27b15c/bin/utaipan-verify-mE87zJ7Ire/data/8dfcea126/c9a0c77814324f41a8c7d76f780ef14d [2023-11-23 21:14:14,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:14:14,638 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:14:14,639 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:14:14,640 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:14:14,645 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:14:14,646 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:14:14" (1/1) ... [2023-11-23 21:14:14,648 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73a42b09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:14, skipping insertion in model container [2023-11-23 21:14:14,648 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:14:14" (1/1) ... [2023-11-23 21:14:14,708 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:14:14,877 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_0f1fdc80-ba0a-4866-bd84-7a342f27b15c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-2.c[914,927] [2023-11-23 21:14:14,958 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_0f1fdc80-ba0a-4866-bd84-7a342f27b15c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-2.c[7115,7128] [2023-11-23 21:14:15,055 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:14:15,070 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:14:15,082 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_0f1fdc80-ba0a-4866-bd84-7a342f27b15c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-2.c[914,927] [2023-11-23 21:14:15,102 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_0f1fdc80-ba0a-4866-bd84-7a342f27b15c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-2.c[7115,7128] [2023-11-23 21:14:15,200 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:14:15,249 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:14:15,250 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:15 WrapperNode [2023-11-23 21:14:15,250 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:14:15,252 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:14:15,252 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:14:15,252 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:14:15,261 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:15" (1/1) ... [2023-11-23 21:14:15,283 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:15" (1/1) ... [2023-11-23 21:14:15,344 INFO L138 Inliner]: procedures = 71, calls = 85, calls flagged for inlining = 39, calls inlined = 39, statements flattened = 896 [2023-11-23 21:14:15,344 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:14:15,345 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:14:15,345 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:14:15,346 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:14:15,358 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:15" (1/1) ... [2023-11-23 21:14:15,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:15" (1/1) ... [2023-11-23 21:14:15,374 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:15" (1/1) ... [2023-11-23 21:14:15,375 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:15" (1/1) ... [2023-11-23 21:14:15,396 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:15" (1/1) ... [2023-11-23 21:14:15,414 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:15" (1/1) ... [2023-11-23 21:14:15,418 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:15" (1/1) ... [2023-11-23 21:14:15,424 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:15" (1/1) ... [2023-11-23 21:14:15,432 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:14:15,433 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:14:15,434 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:14:15,434 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:14:15,435 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:15" (1/1) ... [2023-11-23 21:14:15,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:14:15,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1fdc80-ba0a-4866-bd84-7a342f27b15c/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:14:15,476 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1fdc80-ba0a-4866-bd84-7a342f27b15c/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:14:15,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1fdc80-ba0a-4866-bd84-7a342f27b15c/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:14:15,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:14:15,545 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-23 21:14:15,545 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-23 21:14:15,545 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-11-23 21:14:15,545 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-11-23 21:14:15,546 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-23 21:14:15,546 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-23 21:14:15,546 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-23 21:14:15,546 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-23 21:14:15,546 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-11-23 21:14:15,547 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-11-23 21:14:15,547 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-23 21:14:15,547 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-23 21:14:15,547 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-23 21:14:15,547 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-23 21:14:15,548 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-11-23 21:14:15,548 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-11-23 21:14:15,548 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-11-23 21:14:15,548 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-11-23 21:14:15,549 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-11-23 21:14:15,549 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-11-23 21:14:15,550 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-23 21:14:15,550 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-23 21:14:15,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:14:15,587 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-23 21:14:15,587 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-23 21:14:15,587 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-11-23 21:14:15,587 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-11-23 21:14:15,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:14:15,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:14:15,588 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-23 21:14:15,588 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-23 21:14:15,588 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2023-11-23 21:14:15,588 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2023-11-23 21:14:15,728 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:14:15,737 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:14:16,917 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:14:17,581 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:14:17,582 INFO L309 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-23 21:14:17,584 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:14:17 BoogieIcfgContainer [2023-11-23 21:14:17,585 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:14:17,589 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:14:17,589 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:14:17,594 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:14:17,595 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:14:14" (1/3) ... [2023-11-23 21:14:17,596 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ab255a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:14:17, skipping insertion in model container [2023-11-23 21:14:17,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:15" (2/3) ... [2023-11-23 21:14:17,599 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ab255a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:14:17, skipping insertion in model container [2023-11-23 21:14:17,599 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:14:17" (3/3) ... [2023-11-23 21:14:17,601 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.09.cil-2.c [2023-11-23 21:14:17,627 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:14:17,628 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 21:14:17,727 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:14:17,737 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;@7154e9bd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:14:17,737 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 21:14:17,746 INFO L276 IsEmpty]: Start isEmpty. Operand has 243 states, 186 states have (on average 1.510752688172043) internal successors, (281), 194 states have internal predecessors, (281), 39 states have call successors, (39), 15 states have call predecessors, (39), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-23 21:14:17,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-23 21:14:17,766 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:14:17,767 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:14:17,768 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:14:17,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:14:17,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1303851407, now seen corresponding path program 1 times [2023-11-23 21:14:17,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:14:17,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787161263] [2023-11-23 21:14:17,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:17,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:14:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:18,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:14:18,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:14:18,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787161263] [2023-11-23 21:14:18,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787161263] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:14:18,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:14:18,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 21:14:18,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489620052] [2023-11-23 21:14:18,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:14:18,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:14:18,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:14:18,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:14:18,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:14:18,776 INFO L87 Difference]: Start difference. First operand has 243 states, 186 states have (on average 1.510752688172043) internal successors, (281), 194 states have internal predecessors, (281), 39 states have call successors, (39), 15 states have call predecessors, (39), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 21:14:20,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:14:20,362 INFO L93 Difference]: Finished difference Result 542 states and 786 transitions. [2023-11-23 21:14:20,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 21:14:20,366 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2023-11-23 21:14:20,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:14:20,407 INFO L225 Difference]: With dead ends: 542 [2023-11-23 21:14:20,407 INFO L226 Difference]: Without dead ends: 302 [2023-11-23 21:14:20,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:14:20,423 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 515 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:14:20,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 1068 Invalid, 1061 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [109 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 21:14:20,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2023-11-23 21:14:20,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 289. [2023-11-23 21:14:20,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 220 states have (on average 1.4363636363636363) internal successors, (316), 225 states have internal predecessors, (316), 47 states have call successors, (47), 22 states have call predecessors, (47), 20 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2023-11-23 21:14:20,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 406 transitions. [2023-11-23 21:14:20,576 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 406 transitions. Word has length 45 [2023-11-23 21:14:20,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:14:20,578 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 406 transitions. [2023-11-23 21:14:20,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 21:14:20,579 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 406 transitions. [2023-11-23 21:14:20,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-23 21:14:20,592 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:14:20,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:14:20,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:14:20,593 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:14:20,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:14:20,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1214658312, now seen corresponding path program 1 times [2023-11-23 21:14:20,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:14:20,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023154683] [2023-11-23 21:14:20,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:20,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:14:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:20,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:14:20,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:14:20,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023154683] [2023-11-23 21:14:20,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023154683] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:14:20,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:14:20,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:14:20,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563898633] [2023-11-23 21:14:20,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:14:20,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:14:20,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:14:20,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:14:20,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:14:20,743 INFO L87 Difference]: Start difference. First operand 289 states and 406 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:14:20,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:14:20,925 INFO L93 Difference]: Finished difference Result 514 states and 693 transitions. [2023-11-23 21:14:20,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:14:20,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2023-11-23 21:14:20,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:14:20,932 INFO L225 Difference]: With dead ends: 514 [2023-11-23 21:14:20,932 INFO L226 Difference]: Without dead ends: 398 [2023-11-23 21:14:20,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:14:20,936 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 317 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:14:20,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 349 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:14:20,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2023-11-23 21:14:20,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 384. [2023-11-23 21:14:20,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 285 states have (on average 1.3894736842105264) internal successors, (396), 290 states have internal predecessors, (396), 63 states have call successors, (63), 36 states have call predecessors, (63), 34 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2023-11-23 21:14:20,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 518 transitions. [2023-11-23 21:14:20,999 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 518 transitions. Word has length 46 [2023-11-23 21:14:20,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:14:21,000 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 518 transitions. [2023-11-23 21:14:21,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:14:21,000 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 518 transitions. [2023-11-23 21:14:21,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 21:14:21,003 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:14:21,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:14:21,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:14:21,004 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:14:21,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:14:21,005 INFO L85 PathProgramCache]: Analyzing trace with hash 973242486, now seen corresponding path program 1 times [2023-11-23 21:14:21,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:14:21,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779773875] [2023-11-23 21:14:21,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:21,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:14:21,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:21,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:14:21,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:14:21,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779773875] [2023-11-23 21:14:21,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779773875] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:14:21,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:14:21,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:14:21,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024186017] [2023-11-23 21:14:21,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:14:21,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:14:21,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:14:21,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:14:21,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:14:21,128 INFO L87 Difference]: Start difference. First operand 384 states and 518 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:14:21,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:14:21,353 INFO L93 Difference]: Finished difference Result 748 states and 966 transitions. [2023-11-23 21:14:21,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:14:21,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2023-11-23 21:14:21,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:14:21,360 INFO L225 Difference]: With dead ends: 748 [2023-11-23 21:14:21,360 INFO L226 Difference]: Without dead ends: 538 [2023-11-23 21:14:21,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:14:21,364 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 68 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:14:21,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 554 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:14:21,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2023-11-23 21:14:21,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 534. [2023-11-23 21:14:21,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 390 states have (on average 1.3615384615384616) internal successors, (531), 395 states have internal predecessors, (531), 87 states have call successors, (87), 57 states have call predecessors, (87), 55 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2023-11-23 21:14:21,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 701 transitions. [2023-11-23 21:14:21,448 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 701 transitions. Word has length 47 [2023-11-23 21:14:21,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:14:21,448 INFO L495 AbstractCegarLoop]: Abstraction has 534 states and 701 transitions. [2023-11-23 21:14:21,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:14:21,449 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 701 transitions. [2023-11-23 21:14:21,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-23 21:14:21,456 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:14:21,457 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:14:21,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:14:21,459 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:14:21,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:14:21,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1170427605, now seen corresponding path program 1 times [2023-11-23 21:14:21,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:14:21,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545980443] [2023-11-23 21:14:21,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:21,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:14:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:21,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:14:21,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:14:21,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545980443] [2023-11-23 21:14:21,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545980443] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:14:21,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:14:21,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:14:21,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495561630] [2023-11-23 21:14:21,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:14:21,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:14:21,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:14:21,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:14:21,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:14:21,560 INFO L87 Difference]: Start difference. First operand 534 states and 701 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:14:21,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:14:21,764 INFO L93 Difference]: Finished difference Result 958 states and 1223 transitions. [2023-11-23 21:14:21,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:14:21,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2023-11-23 21:14:21,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:14:21,774 INFO L225 Difference]: With dead ends: 958 [2023-11-23 21:14:21,777 INFO L226 Difference]: Without dead ends: 597 [2023-11-23 21:14:21,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:14:21,791 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 317 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:14:21,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 356 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:14:21,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2023-11-23 21:14:21,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 585. [2023-11-23 21:14:21,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 426 states have (on average 1.3450704225352113) internal successors, (573), 431 states have internal predecessors, (573), 95 states have call successors, (95), 64 states have call predecessors, (95), 62 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2023-11-23 21:14:21,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 759 transitions. [2023-11-23 21:14:21,891 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 759 transitions. Word has length 53 [2023-11-23 21:14:21,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:14:21,892 INFO L495 AbstractCegarLoop]: Abstraction has 585 states and 759 transitions. [2023-11-23 21:14:21,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:14:21,892 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 759 transitions. [2023-11-23 21:14:21,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-23 21:14:21,894 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:14:21,895 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:14:21,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:14:21,896 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:14:21,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:14:21,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1406770363, now seen corresponding path program 1 times [2023-11-23 21:14:21,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:14:21,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355097497] [2023-11-23 21:14:21,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:21,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:14:21,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:22,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:14:22,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:14:22,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355097497] [2023-11-23 21:14:22,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355097497] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:14:22,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:14:22,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:14:22,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419936961] [2023-11-23 21:14:22,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:14:22,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:14:22,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:14:22,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:14:22,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:14:22,135 INFO L87 Difference]: Start difference. First operand 585 states and 759 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-23 21:14:22,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:14:22,610 INFO L93 Difference]: Finished difference Result 694 states and 891 transitions. [2023-11-23 21:14:22,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:14:22,611 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2023-11-23 21:14:22,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:14:22,617 INFO L225 Difference]: With dead ends: 694 [2023-11-23 21:14:22,617 INFO L226 Difference]: Without dead ends: 691 [2023-11-23 21:14:22,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:14:22,622 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 572 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:14:22,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 335 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:14:22,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2023-11-23 21:14:22,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 584. [2023-11-23 21:14:22,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 426 states have (on average 1.3380281690140845) internal successors, (570), 430 states have internal predecessors, (570), 94 states have call successors, (94), 64 states have call predecessors, (94), 62 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2023-11-23 21:14:22,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 755 transitions. [2023-11-23 21:14:22,707 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 755 transitions. Word has length 54 [2023-11-23 21:14:22,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:14:22,708 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 755 transitions. [2023-11-23 21:14:22,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-23 21:14:22,708 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 755 transitions. [2023-11-23 21:14:22,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-23 21:14:22,710 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:14:22,710 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:14:22,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:14:22,711 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:14:22,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:14:22,712 INFO L85 PathProgramCache]: Analyzing trace with hash 658957279, now seen corresponding path program 1 times [2023-11-23 21:14:22,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:14:22,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50325816] [2023-11-23 21:14:22,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:22,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:14:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:22,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:14:22,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:14:22,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50325816] [2023-11-23 21:14:22,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50325816] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:14:22,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883502587] [2023-11-23 21:14:22,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:22,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:14:22,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1fdc80-ba0a-4866-bd84-7a342f27b15c/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:14:22,942 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1fdc80-ba0a-4866-bd84-7a342f27b15c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:14:22,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1fdc80-ba0a-4866-bd84-7a342f27b15c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:14:23,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:23,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:14:23,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:14:23,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:14:23,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:14:23,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:14:23,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883502587] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:14:23,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2181539] [2023-11-23 21:14:23,683 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-11-23 21:14:23,683 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:14:23,688 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:14:23,694 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:14:23,694 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:14:32,330 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 181 for LOIs [2023-11-23 21:14:32,431 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 177 for LOIs [2023-11-23 21:14:32,520 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 185 for LOIs [2023-11-23 21:14:34,147 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 181 for LOIs [2023-11-23 21:14:34,429 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 181 for LOIs [2023-11-23 21:14:34,841 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 181 for LOIs [2023-11-23 21:14:35,000 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 188 for LOIs [2023-11-23 21:14:35,147 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:15:02,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2181539] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:02,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:15:02,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [5, 5, 4] total 41 [2023-11-23 21:15:02,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548643148] [2023-11-23 21:15:02,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:02,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-23 21:15:02,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:02,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-23 21:15:02,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2023-11-23 21:15:02,056 INFO L87 Difference]: Start difference. First operand 584 states and 755 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)