./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_118d09e1-74e6-4e95-83bf-b4c232fe84e1/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_118d09e1-74e6-4e95-83bf-b4c232fe84e1/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_118d09e1-74e6-4e95-83bf-b4c232fe84e1/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_118d09e1-74e6-4e95-83bf-b4c232fe84e1/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_118d09e1-74e6-4e95-83bf-b4c232fe84e1/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_118d09e1-74e6-4e95-83bf-b4c232fe84e1/bin/utaipan-verify-DbMuA5NWw2 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ea93d7c6d06d46004840cc5fcb436c7c307334e6ee754b8ee507b78f644445d --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:32:26,657 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:32:26,751 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_118d09e1-74e6-4e95-83bf-b4c232fe84e1/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:32:26,759 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:32:26,760 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:32:26,811 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:32:26,812 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:32:26,812 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:32:26,813 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:32:26,813 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:32:26,817 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:32:26,818 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:32:26,818 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:32:26,819 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:32:26,819 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:32:26,820 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:32:26,820 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:32:26,821 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:32:26,825 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:32:26,826 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:32:26,827 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:32:26,828 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:32:26,829 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:32:26,830 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:32:26,830 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:32:26,830 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:32:26,830 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:32:26,832 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:32:26,832 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:32:26,832 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:32:26,833 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:32:26,834 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:32:26,835 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:32:26,835 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:32:26,835 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:32:26,835 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:32:26,836 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:32:26,836 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:32:26,836 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:32:26,836 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:32:26,837 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:32:26,837 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:32:26,837 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:32:26,838 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:32:26,838 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:32:26,839 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:32:26,839 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:32:26,839 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_118d09e1-74e6-4e95-83bf-b4c232fe84e1/bin/utaipan-verify-DbMuA5NWw2/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_118d09e1-74e6-4e95-83bf-b4c232fe84e1/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ea93d7c6d06d46004840cc5fcb436c7c307334e6ee754b8ee507b78f644445d [2024-11-02 12:32:27,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:32:27,157 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:32:27,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:32:27,161 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:32:27,161 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:32:27,163 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_118d09e1-74e6-4e95-83bf-b4c232fe84e1/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c Unable to find full path for "g++" [2024-11-02 12:32:29,275 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:32:29,516 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:32:29,516 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_118d09e1-74e6-4e95-83bf-b4c232fe84e1/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c [2024-11-02 12:32:29,532 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_118d09e1-74e6-4e95-83bf-b4c232fe84e1/bin/utaipan-verify-DbMuA5NWw2/data/5544b1194/f5b6eaf67166497f9fca9ad7913127cf/FLAG67fb6a1b7 [2024-11-02 12:32:29,875 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_118d09e1-74e6-4e95-83bf-b4c232fe84e1/bin/utaipan-verify-DbMuA5NWw2/data/5544b1194/f5b6eaf67166497f9fca9ad7913127cf [2024-11-02 12:32:29,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:32:29,878 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:32:29,879 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:32:29,879 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:32:29,885 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:32:29,886 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:32:29" (1/1) ... [2024-11-02 12:32:29,887 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@429878b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:29, skipping insertion in model container [2024-11-02 12:32:29,888 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:32:29" (1/1) ... [2024-11-02 12:32:29,937 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:32:30,125 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_118d09e1-74e6-4e95-83bf-b4c232fe84e1/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c[914,927] [2024-11-02 12:32:30,196 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_118d09e1-74e6-4e95-83bf-b4c232fe84e1/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c[7115,7128] [2024-11-02 12:32:30,252 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:32:30,277 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:32:30,291 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_118d09e1-74e6-4e95-83bf-b4c232fe84e1/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c[914,927] [2024-11-02 12:32:30,333 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_118d09e1-74e6-4e95-83bf-b4c232fe84e1/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c[7115,7128] [2024-11-02 12:32:30,368 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:32:30,396 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:32:30,396 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:30 WrapperNode [2024-11-02 12:32:30,396 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:32:30,397 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:32:30,397 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:32:30,398 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:32:30,404 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:30" (1/1) ... [2024-11-02 12:32:30,420 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:30" (1/1) ... [2024-11-02 12:32:30,461 INFO L138 Inliner]: procedures = 57, calls = 64, calls flagged for inlining = 25, calls inlined = 25, statements flattened = 474 [2024-11-02 12:32:30,461 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:32:30,462 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:32:30,463 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:32:30,463 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:32:30,478 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:30" (1/1) ... [2024-11-02 12:32:30,479 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:30" (1/1) ... [2024-11-02 12:32:30,486 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:30" (1/1) ... [2024-11-02 12:32:30,486 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:30" (1/1) ... [2024-11-02 12:32:30,500 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:30" (1/1) ... [2024-11-02 12:32:30,509 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:30" (1/1) ... [2024-11-02 12:32:30,512 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:30" (1/1) ... [2024-11-02 12:32:30,514 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:30" (1/1) ... [2024-11-02 12:32:30,520 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:32:30,521 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:32:30,521 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:32:30,522 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:32:30,523 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:30" (1/1) ... [2024-11-02 12:32:30,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:32:30,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_118d09e1-74e6-4e95-83bf-b4c232fe84e1/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:32:30,554 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_118d09e1-74e6-4e95-83bf-b4c232fe84e1/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:32:30,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_118d09e1-74e6-4e95-83bf-b4c232fe84e1/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:32:30,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:32:30,594 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-02 12:32:30,595 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-02 12:32:30,595 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2024-11-02 12:32:30,595 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2024-11-02 12:32:30,595 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-02 12:32:30,596 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-02 12:32:30,596 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-02 12:32:30,596 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-02 12:32:30,596 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2024-11-02 12:32:30,596 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2024-11-02 12:32:30,596 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-02 12:32:30,597 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-02 12:32:30,597 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-02 12:32:30,598 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-02 12:32:30,598 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2024-11-02 12:32:30,598 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2024-11-02 12:32:30,598 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2024-11-02 12:32:30,599 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2024-11-02 12:32:30,600 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2024-11-02 12:32:30,600 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2024-11-02 12:32:30,600 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-02 12:32:30,600 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-02 12:32:30,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:32:30,602 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-02 12:32:30,602 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-02 12:32:30,602 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2024-11-02 12:32:30,602 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2024-11-02 12:32:30,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:32:30,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:32:30,603 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-02 12:32:30,604 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-02 12:32:30,604 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2024-11-02 12:32:30,604 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2024-11-02 12:32:30,763 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:32:30,766 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:32:31,552 INFO L? ?]: Removed 71 outVars from TransFormulas that were not future-live. [2024-11-02 12:32:31,553 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:32:31,812 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:32:31,812 INFO L316 CfgBuilder]: Removed 9 assume(true) statements. [2024-11-02 12:32:31,813 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:32:31 BoogieIcfgContainer [2024-11-02 12:32:31,813 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:32:31,816 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:32:31,816 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:32:31,820 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:32:31,821 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:32:29" (1/3) ... [2024-11-02 12:32:31,821 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1727ce5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:32:31, skipping insertion in model container [2024-11-02 12:32:31,821 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:30" (2/3) ... [2024-11-02 12:32:31,822 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1727ce5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:32:31, skipping insertion in model container [2024-11-02 12:32:31,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:32:31" (3/3) ... [2024-11-02 12:32:31,823 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.02.cil-2.c [2024-11-02 12:32:31,844 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:32:31,844 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-02 12:32:31,930 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:32:31,936 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7152773e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:32:31,937 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-02 12:32:31,940 INFO L276 IsEmpty]: Start isEmpty. Operand has 159 states, 109 states have (on average 1.4862385321100917) internal successors, (162), 117 states have internal predecessors, (162), 32 states have call successors, (32), 15 states have call predecessors, (32), 15 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-02 12:32:31,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-02 12:32:31,951 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:31,952 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:32:31,952 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:31,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:31,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1598548224, now seen corresponding path program 1 times [2024-11-02 12:32:31,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:31,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553942546] [2024-11-02 12:32:31,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:31,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:32,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:32,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:32,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553942546] [2024-11-02 12:32:32,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553942546] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:32,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:32,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-02 12:32:32,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147565408] [2024-11-02 12:32:32,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:32,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:32:32,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:32,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:32:32,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:32:32,461 INFO L87 Difference]: Start difference. First operand has 159 states, 109 states have (on average 1.4862385321100917) internal successors, (162), 117 states have internal predecessors, (162), 32 states have call successors, (32), 15 states have call predecessors, (32), 15 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 12:32:33,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:33,326 INFO L93 Difference]: Finished difference Result 591 states and 871 transitions. [2024-11-02 12:32:33,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:32:33,331 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2024-11-02 12:32:33,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:33,354 INFO L225 Difference]: With dead ends: 591 [2024-11-02 12:32:33,354 INFO L226 Difference]: Without dead ends: 427 [2024-11-02 12:32:33,358 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:32:33,362 INFO L432 NwaCegarLoop]: 245 mSDtfsCounter, 559 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:33,363 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 570 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-02 12:32:33,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2024-11-02 12:32:33,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 414. [2024-11-02 12:32:33,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 298 states have (on average 1.3691275167785235) internal successors, (408), 306 states have internal predecessors, (408), 77 states have call successors, (77), 39 states have call predecessors, (77), 37 states have return successors, (95), 70 states have call predecessors, (95), 73 states have call successors, (95) [2024-11-02 12:32:33,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 580 transitions. [2024-11-02 12:32:33,499 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 580 transitions. Word has length 38 [2024-11-02 12:32:33,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:33,499 INFO L471 AbstractCegarLoop]: Abstraction has 414 states and 580 transitions. [2024-11-02 12:32:33,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 12:32:33,500 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 580 transitions. [2024-11-02 12:32:33,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-02 12:32:33,503 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:33,503 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:32:33,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:32:33,504 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:33,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:33,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1564230520, now seen corresponding path program 1 times [2024-11-02 12:32:33,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:33,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030433834] [2024-11-02 12:32:33,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:33,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:33,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:33,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:33,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:33,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030433834] [2024-11-02 12:32:33,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030433834] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:33,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:33,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 12:32:33,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387696985] [2024-11-02 12:32:33,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:33,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:32:33,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:33,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:32:33,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:32:33,707 INFO L87 Difference]: Start difference. First operand 414 states and 580 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-02 12:32:34,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:34,657 INFO L93 Difference]: Finished difference Result 889 states and 1210 transitions. [2024-11-02 12:32:34,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 12:32:34,658 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2024-11-02 12:32:34,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:34,664 INFO L225 Difference]: With dead ends: 889 [2024-11-02 12:32:34,665 INFO L226 Difference]: Without dead ends: 825 [2024-11-02 12:32:34,666 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-02 12:32:34,667 INFO L432 NwaCegarLoop]: 290 mSDtfsCounter, 735 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:34,668 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 742 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-02 12:32:34,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2024-11-02 12:32:34,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 754. [2024-11-02 12:32:34,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 535 states have (on average 1.3214953271028038) internal successors, (707), 543 states have internal predecessors, (707), 132 states have call successors, (132), 87 states have call predecessors, (132), 85 states have return successors, (165), 125 states have call predecessors, (165), 128 states have call successors, (165) [2024-11-02 12:32:34,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1004 transitions. [2024-11-02 12:32:34,798 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1004 transitions. Word has length 45 [2024-11-02 12:32:34,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:34,799 INFO L471 AbstractCegarLoop]: Abstraction has 754 states and 1004 transitions. [2024-11-02 12:32:34,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-02 12:32:34,799 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1004 transitions. [2024-11-02 12:32:34,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-02 12:32:34,801 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:34,801 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:32:34,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:32:34,802 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:34,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:34,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1341051880, now seen corresponding path program 1 times [2024-11-02 12:32:34,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:34,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064591192] [2024-11-02 12:32:34,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:34,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:35,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:35,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064591192] [2024-11-02 12:32:35,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064591192] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:35,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:35,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-02 12:32:35,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186067991] [2024-11-02 12:32:35,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:35,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 12:32:35,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:35,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 12:32:35,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:32:35,098 INFO L87 Difference]: Start difference. First operand 754 states and 1004 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) [2024-11-02 12:32:35,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:35,958 INFO L93 Difference]: Finished difference Result 1515 states and 1951 transitions. [2024-11-02 12:32:35,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-02 12:32:35,959 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 [2024-11-02 12:32:35,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:35,967 INFO L225 Difference]: With dead ends: 1515 [2024-11-02 12:32:35,967 INFO L226 Difference]: Without dead ends: 1112 [2024-11-02 12:32:35,970 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-11-02 12:32:35,972 INFO L432 NwaCegarLoop]: 127 mSDtfsCounter, 320 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:35,973 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 562 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-02 12:32:35,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2024-11-02 12:32:36,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1083. [2024-11-02 12:32:36,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 758 states have (on average 1.2902374670184698) internal successors, (978), 767 states have internal predecessors, (978), 188 states have call successors, (188), 135 states have call predecessors, (188), 135 states have return successors, (239), 182 states have call predecessors, (239), 184 states have call successors, (239) [2024-11-02 12:32:36,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 1405 transitions. [2024-11-02 12:32:36,104 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 1405 transitions. Word has length 46 [2024-11-02 12:32:36,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:36,104 INFO L471 AbstractCegarLoop]: Abstraction has 1083 states and 1405 transitions. [2024-11-02 12:32:36,105 INFO L472 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) [2024-11-02 12:32:36,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 1405 transitions. [2024-11-02 12:32:36,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-02 12:32:36,107 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:36,107 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:32:36,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:32:36,108 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:36,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:36,109 INFO L85 PathProgramCache]: Analyzing trace with hash -693829468, now seen corresponding path program 1 times [2024-11-02 12:32:36,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:36,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2921576] [2024-11-02 12:32:36,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:36,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:36,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:36,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:36,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2921576] [2024-11-02 12:32:36,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2921576] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:36,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:36,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:32:36,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166602203] [2024-11-02 12:32:36,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:36,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:32:36,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:36,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:32:36,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:32:36,212 INFO L87 Difference]: Start difference. First operand 1083 states and 1405 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) [2024-11-02 12:32:36,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:36,457 INFO L93 Difference]: Finished difference Result 2024 states and 2564 transitions. [2024-11-02 12:32:36,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:32:36,457 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 [2024-11-02 12:32:36,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:36,467 INFO L225 Difference]: With dead ends: 2024 [2024-11-02 12:32:36,467 INFO L226 Difference]: Without dead ends: 1342 [2024-11-02 12:32:36,470 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:32:36,473 INFO L432 NwaCegarLoop]: 182 mSDtfsCounter, 68 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:36,474 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 336 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:32:36,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2024-11-02 12:32:36,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1320. [2024-11-02 12:32:36,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 919 states have (on average 1.2752992383025028) internal successors, (1172), 928 states have internal predecessors, (1172), 230 states have call successors, (230), 173 states have call predecessors, (230), 169 states have return successors, (285), 220 states have call predecessors, (285), 226 states have call successors, (285) [2024-11-02 12:32:36,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1687 transitions. [2024-11-02 12:32:36,686 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1687 transitions. Word has length 47 [2024-11-02 12:32:36,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:36,687 INFO L471 AbstractCegarLoop]: Abstraction has 1320 states and 1687 transitions. [2024-11-02 12:32:36,687 INFO L472 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) [2024-11-02 12:32:36,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1687 transitions. [2024-11-02 12:32:36,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-02 12:32:36,692 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:36,692 INFO L215 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] [2024-11-02 12:32:36,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:32:36,693 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:36,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:36,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1638488101, now seen corresponding path program 1 times [2024-11-02 12:32:36,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:36,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417210821] [2024-11-02 12:32:36,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:36,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:36,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:32:36,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:36,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417210821] [2024-11-02 12:32:36,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417210821] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:36,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:36,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:32:36,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484128488] [2024-11-02 12:32:36,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:36,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:32:36,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:36,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:32:36,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:32:36,774 INFO L87 Difference]: Start difference. First operand 1320 states and 1687 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) [2024-11-02 12:32:36,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:36,966 INFO L93 Difference]: Finished difference Result 1726 states and 2177 transitions. [2024-11-02 12:32:36,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:32:36,967 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 [2024-11-02 12:32:36,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:36,974 INFO L225 Difference]: With dead ends: 1726 [2024-11-02 12:32:36,975 INFO L226 Difference]: Without dead ends: 1171 [2024-11-02 12:32:36,976 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:32:36,978 INFO L432 NwaCegarLoop]: 183 mSDtfsCounter, 178 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:36,979 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 245 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:32:36,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2024-11-02 12:32:37,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 965. [2024-11-02 12:32:37,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 683 states have (on average 1.2723279648609078) internal successors, (869), 691 states have internal predecessors, (869), 167 states have call successors, (167), 119 states have call predecessors, (167), 113 states have return successors, (193), 156 states have call predecessors, (193), 163 states have call successors, (193) [2024-11-02 12:32:37,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1229 transitions. [2024-11-02 12:32:37,114 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1229 transitions. Word has length 53 [2024-11-02 12:32:37,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:37,115 INFO L471 AbstractCegarLoop]: Abstraction has 965 states and 1229 transitions. [2024-11-02 12:32:37,116 INFO L472 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) [2024-11-02 12:32:37,116 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1229 transitions. [2024-11-02 12:32:37,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-02 12:32:37,118 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:37,119 INFO L215 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] [2024-11-02 12:32:37,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 12:32:37,120 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:37,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:37,121 INFO L85 PathProgramCache]: Analyzing trace with hash 202237958, now seen corresponding path program 1 times [2024-11-02 12:32:37,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:37,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007613210] [2024-11-02 12:32:37,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:37,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:37,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:37,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:37,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007613210] [2024-11-02 12:32:37,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007613210] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:37,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:37,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:32:37,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497534655] [2024-11-02 12:32:37,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:37,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:32:37,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:37,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:32:37,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:32:37,222 INFO L87 Difference]: Start difference. First operand 965 states and 1229 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) [2024-11-02 12:32:37,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:37,597 INFO L93 Difference]: Finished difference Result 1220 states and 1530 transitions. [2024-11-02 12:32:37,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:32:37,597 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 [2024-11-02 12:32:37,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:37,604 INFO L225 Difference]: With dead ends: 1220 [2024-11-02 12:32:37,604 INFO L226 Difference]: Without dead ends: 1217 [2024-11-02 12:32:37,605 INFO L431 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 [2024-11-02 12:32:37,606 INFO L432 NwaCegarLoop]: 178 mSDtfsCounter, 331 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:37,606 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 221 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:32:37,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2024-11-02 12:32:37,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 964. [2024-11-02 12:32:37,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 683 states have (on average 1.2635431918008784) internal successors, (863), 690 states have internal predecessors, (863), 166 states have call successors, (166), 119 states have call predecessors, (166), 113 states have return successors, (193), 156 states have call predecessors, (193), 163 states have call successors, (193) [2024-11-02 12:32:37,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1222 transitions. [2024-11-02 12:32:37,728 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1222 transitions. Word has length 54 [2024-11-02 12:32:37,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:37,729 INFO L471 AbstractCegarLoop]: Abstraction has 964 states and 1222 transitions. [2024-11-02 12:32:37,729 INFO L472 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) [2024-11-02 12:32:37,729 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1222 transitions. [2024-11-02 12:32:37,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-02 12:32:37,730 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:37,731 INFO L215 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] [2024-11-02 12:32:37,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 12:32:37,731 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:37,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:37,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1973678733, now seen corresponding path program 1 times [2024-11-02 12:32:37,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:37,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086425680] [2024-11-02 12:32:37,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:37,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:37,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:37,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086425680] [2024-11-02 12:32:37,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086425680] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:32:37,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301843388] [2024-11-02 12:32:37,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:37,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:32:37,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_118d09e1-74e6-4e95-83bf-b4c232fe84e1/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:32:37,907 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_118d09e1-74e6-4e95-83bf-b4c232fe84e1/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:32:37,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_118d09e1-74e6-4e95-83bf-b4c232fe84e1/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:32:38,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:38,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 12:32:38,027 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:32:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:38,294 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:32:38,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:38,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301843388] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:32:38,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1172629461] [2024-11-02 12:32:38,451 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-02 12:32:38,452 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:32:38,456 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:32:38,461 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:32:38,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:32:41,600 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 111 for LOIs [2024-11-02 12:32:41,653 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 107 for LOIs [2024-11-02 12:32:41,706 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 115 for LOIs [2024-11-02 12:32:42,336 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 111 for LOIs [2024-11-02 12:32:42,479 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 111 for LOIs [2024-11-02 12:32:42,618 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 111 for LOIs [2024-11-02 12:32:42,670 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 118 for LOIs [2024-11-02 12:32:42,722 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:32:51,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1172629461] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:51,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:32:51,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [5, 5, 4] total 36 [2024-11-02 12:32:51,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147413922] [2024-11-02 12:32:51,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:51,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-02 12:32:51,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:51,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-02 12:32:51,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2024-11-02 12:32:51,605 INFO L87 Difference]: Start difference. First operand 964 states and 1222 transitions. Second operand has 31 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 7 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-02 12:32:58,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:58,730 INFO L93 Difference]: Finished difference Result 1603 states and 1978 transitions. [2024-11-02 12:32:58,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-02 12:32:58,731 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 7 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 55 [2024-11-02 12:32:58,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:58,738 INFO L225 Difference]: With dead ends: 1603 [2024-11-02 12:32:58,738 INFO L226 Difference]: Without dead ends: 990 [2024-11-02 12:32:58,741 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=405, Invalid=1947, Unknown=0, NotChecked=0, Total=2352 [2024-11-02 12:32:58,742 INFO L432 NwaCegarLoop]: 158 mSDtfsCounter, 106 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 1595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:58,742 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 976 Invalid, 1595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1503 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-02 12:32:58,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2024-11-02 12:32:58,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 982. [2024-11-02 12:32:58,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 699 states have (on average 1.2603719599427754) internal successors, (881), 706 states have internal predecessors, (881), 167 states have call successors, (167), 120 states have call predecessors, (167), 114 states have return successors, (194), 157 states have call predecessors, (194), 164 states have call successors, (194) [2024-11-02 12:32:58,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1242 transitions. [2024-11-02 12:32:58,897 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1242 transitions. Word has length 55 [2024-11-02 12:32:58,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:58,897 INFO L471 AbstractCegarLoop]: Abstraction has 982 states and 1242 transitions. [2024-11-02 12:32:58,897 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 7 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-02 12:32:58,898 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1242 transitions. [2024-11-02 12:32:58,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-02 12:32:58,900 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:58,900 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:32:58,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_118d09e1-74e6-4e95-83bf-b4c232fe84e1/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-02 12:32:59,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_118d09e1-74e6-4e95-83bf-b4c232fe84e1/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-02 12:32:59,104 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:59,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:59,108 INFO L85 PathProgramCache]: Analyzing trace with hash 954353659, now seen corresponding path program 1 times [2024-11-02 12:32:59,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:59,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177220834] [2024-11-02 12:32:59,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:59,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:32:59,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:59,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177220834] [2024-11-02 12:32:59,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177220834] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:59,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:59,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:32:59,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185736909] [2024-11-02 12:32:59,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:59,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:32:59,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:59,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:32:59,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:32:59,188 INFO L87 Difference]: Start difference. First operand 982 states and 1242 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-02 12:32:59,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:59,425 INFO L93 Difference]: Finished difference Result 1564 states and 1925 transitions. [2024-11-02 12:32:59,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:32:59,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2024-11-02 12:32:59,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:59,433 INFO L225 Difference]: With dead ends: 1564 [2024-11-02 12:32:59,433 INFO L226 Difference]: Without dead ends: 1191 [2024-11-02 12:32:59,435 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:32:59,436 INFO L432 NwaCegarLoop]: 204 mSDtfsCounter, 43 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:59,436 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 372 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:32:59,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2024-11-02 12:32:59,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1103. [2024-11-02 12:32:59,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 780 states have (on average 1.2487179487179487) internal successors, (974), 791 states have internal predecessors, (974), 189 states have call successors, (189), 142 states have call predecessors, (189), 132 states have return successors, (216), 171 states have call predecessors, (216), 186 states have call successors, (216) [2024-11-02 12:32:59,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1379 transitions. [2024-11-02 12:32:59,592 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1379 transitions. Word has length 61 [2024-11-02 12:32:59,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:59,593 INFO L471 AbstractCegarLoop]: Abstraction has 1103 states and 1379 transitions. [2024-11-02 12:32:59,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-02 12:32:59,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1379 transitions. [2024-11-02 12:32:59,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-02 12:32:59,595 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:59,595 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:32:59,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-02 12:32:59,596 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:59,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:59,597 INFO L85 PathProgramCache]: Analyzing trace with hash 945596385, now seen corresponding path program 1 times [2024-11-02 12:32:59,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:59,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872326806] [2024-11-02 12:32:59,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:59,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms