./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.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_607f26a5-b9ae-46ae-a00a-9cd0faa4fd41/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f26a5-b9ae-46ae-a00a-9cd0faa4fd41/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_607f26a5-b9ae-46ae-a00a-9cd0faa4fd41/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f26a5-b9ae-46ae-a00a-9cd0faa4fd41/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f26a5-b9ae-46ae-a00a-9cd0faa4fd41/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_607f26a5-b9ae-46ae-a00a-9cd0faa4fd41/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 b395f094f2d3990354e9b2c1428e908d883c16492f3b21174dd87f3c0cfda780 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:29:29,912 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:29:29,999 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f26a5-b9ae-46ae-a00a-9cd0faa4fd41/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:29:30,003 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:29:30,007 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:29:30,041 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:29:30,042 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:29:30,043 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:29:30,044 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:29:30,045 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:29:30,046 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:29:30,046 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:29:30,047 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:29:30,048 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:29:30,050 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:29:30,050 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:29:30,051 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:29:30,051 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:29:30,051 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:29:30,052 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:29:30,052 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:29:30,057 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:29:30,057 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:29:30,058 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:29:30,058 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:29:30,058 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:29:30,058 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:29:30,059 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:29:30,059 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:29:30,059 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:29:30,060 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:29:30,060 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:29:30,060 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:29:30,061 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:29:30,061 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:29:30,061 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:29:30,062 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:29:30,062 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:29:30,062 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:29:30,062 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:29:30,063 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:29:30,065 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:29:30,065 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:29:30,066 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:29:30,067 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:29:30,067 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:29:30,067 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:29:30,067 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_607f26a5-b9ae-46ae-a00a-9cd0faa4fd41/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f26a5-b9ae-46ae-a00a-9cd0faa4fd41/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b395f094f2d3990354e9b2c1428e908d883c16492f3b21174dd87f3c0cfda780 [2024-11-02 12:29:30,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:29:30,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:29:30,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:29:30,394 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:29:30,395 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:29:30,396 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f26a5-b9ae-46ae-a00a-9cd0faa4fd41/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c Unable to find full path for "g++" [2024-11-02 12:29:32,483 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:29:32,699 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:29:32,700 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f26a5-b9ae-46ae-a00a-9cd0faa4fd41/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c [2024-11-02 12:29:32,717 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f26a5-b9ae-46ae-a00a-9cd0faa4fd41/bin/utaipan-verify-DbMuA5NWw2/data/d24575c47/6083af12cb2141efb33108b085f4e909/FLAG485cec929 [2024-11-02 12:29:32,738 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f26a5-b9ae-46ae-a00a-9cd0faa4fd41/bin/utaipan-verify-DbMuA5NWw2/data/d24575c47/6083af12cb2141efb33108b085f4e909 [2024-11-02 12:29:32,741 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:29:32,743 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:29:32,746 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:29:32,747 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:29:32,753 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:29:32,754 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:29:32" (1/1) ... [2024-11-02 12:29:32,755 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5824d8fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:32, skipping insertion in model container [2024-11-02 12:29:32,755 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:29:32" (1/1) ... [2024-11-02 12:29:32,812 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:29:33,044 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_607f26a5-b9ae-46ae-a00a-9cd0faa4fd41/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c[914,927] [2024-11-02 12:29:33,102 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_607f26a5-b9ae-46ae-a00a-9cd0faa4fd41/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c[7115,7128] [2024-11-02 12:29:33,197 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:29:33,216 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:29:33,230 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_607f26a5-b9ae-46ae-a00a-9cd0faa4fd41/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c[914,927] [2024-11-02 12:29:33,259 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_607f26a5-b9ae-46ae-a00a-9cd0faa4fd41/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c[7115,7128] [2024-11-02 12:29:33,306 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:29:33,339 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:29:33,340 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:33 WrapperNode [2024-11-02 12:29:33,340 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:29:33,341 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:29:33,342 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:29:33,342 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:29:33,350 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:33" (1/1) ... [2024-11-02 12:29:33,364 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:33" (1/1) ... [2024-11-02 12:29:33,419 INFO L138 Inliner]: procedures = 67, calls = 78, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 768 [2024-11-02 12:29:33,419 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:29:33,420 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:29:33,420 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:29:33,420 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:29:33,430 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:33" (1/1) ... [2024-11-02 12:29:33,430 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:33" (1/1) ... [2024-11-02 12:29:33,437 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:33" (1/1) ... [2024-11-02 12:29:33,438 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:33" (1/1) ... [2024-11-02 12:29:33,452 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:33" (1/1) ... [2024-11-02 12:29:33,472 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:33" (1/1) ... [2024-11-02 12:29:33,481 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:33" (1/1) ... [2024-11-02 12:29:33,489 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:33" (1/1) ... [2024-11-02 12:29:33,498 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:29:33,499 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:29:33,499 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:29:33,500 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:29:33,505 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:33" (1/1) ... [2024-11-02 12:29:33,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:29:33,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f26a5-b9ae-46ae-a00a-9cd0faa4fd41/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:29:33,541 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f26a5-b9ae-46ae-a00a-9cd0faa4fd41/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:29:33,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f26a5-b9ae-46ae-a00a-9cd0faa4fd41/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:29:33,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:29:33,579 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-02 12:29:33,580 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-02 12:29:33,580 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2024-11-02 12:29:33,580 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2024-11-02 12:29:33,580 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-02 12:29:33,580 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-02 12:29:33,581 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-02 12:29:33,581 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-02 12:29:33,581 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2024-11-02 12:29:33,581 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2024-11-02 12:29:33,581 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-02 12:29:33,582 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-02 12:29:33,582 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-02 12:29:33,582 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-02 12:29:33,582 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2024-11-02 12:29:33,582 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2024-11-02 12:29:33,583 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2024-11-02 12:29:33,583 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2024-11-02 12:29:33,583 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2024-11-02 12:29:33,584 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2024-11-02 12:29:33,584 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-02 12:29:33,585 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-02 12:29:33,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:29:33,585 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-02 12:29:33,585 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-02 12:29:33,585 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2024-11-02 12:29:33,586 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2024-11-02 12:29:33,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:29:33,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:29:33,587 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-02 12:29:33,588 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-02 12:29:33,780 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:29:33,783 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:29:34,833 INFO L? ?]: Removed 97 outVars from TransFormulas that were not future-live. [2024-11-02 12:29:34,834 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:29:35,348 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:29:35,348 INFO L316 CfgBuilder]: Removed 14 assume(true) statements. [2024-11-02 12:29:35,349 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:29:35 BoogieIcfgContainer [2024-11-02 12:29:35,349 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:29:35,359 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:29:35,359 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:29:35,367 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:29:35,368 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:29:32" (1/3) ... [2024-11-02 12:29:35,369 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b546ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:29:35, skipping insertion in model container [2024-11-02 12:29:35,369 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:33" (2/3) ... [2024-11-02 12:29:35,369 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b546ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:29:35, skipping insertion in model container [2024-11-02 12:29:35,370 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:29:35" (3/3) ... [2024-11-02 12:29:35,371 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.07.cil-1.c [2024-11-02 12:29:35,402 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:29:35,403 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-02 12:29:35,522 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:29:35,532 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;@83c16c2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:29:35,533 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-02 12:29:35,540 INFO L276 IsEmpty]: Start isEmpty. Operand has 213 states, 161 states have (on average 1.4968944099378882) internal successors, (241), 167 states have internal predecessors, (241), 35 states have call successors, (35), 14 states have call predecessors, (35), 14 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2024-11-02 12:29:35,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-02 12:29:35,552 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:35,553 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 12:29:35,554 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:29:35,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:35,561 INFO L85 PathProgramCache]: Analyzing trace with hash 543949616, now seen corresponding path program 1 times [2024-11-02 12:29:35,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:35,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396376740] [2024-11-02 12:29:35,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:35,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:36,049 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 12:29:36,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:36,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396376740] [2024-11-02 12:29:36,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396376740] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:29:36,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:29:36,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:29:36,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027448876] [2024-11-02 12:29:36,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:29:36,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:29:36,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:36,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:29:36,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:29:36,098 INFO L87 Difference]: Start difference. First operand has 213 states, 161 states have (on average 1.4968944099378882) internal successors, (241), 167 states have internal predecessors, (241), 35 states have call successors, (35), 14 states have call predecessors, (35), 14 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-02 12:29:36,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:36,618 INFO L93 Difference]: Finished difference Result 477 states and 693 transitions. [2024-11-02 12:29:36,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:29:36,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2024-11-02 12:29:36,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:36,635 INFO L225 Difference]: With dead ends: 477 [2024-11-02 12:29:36,635 INFO L226 Difference]: Without dead ends: 268 [2024-11-02 12:29:36,642 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:29:36,647 INFO L432 NwaCegarLoop]: 306 mSDtfsCounter, 359 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:36,649 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 524 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 12:29:36,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2024-11-02 12:29:36,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 261. [2024-11-02 12:29:36,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 196 states have (on average 1.3979591836734695) internal successors, (274), 200 states have internal predecessors, (274), 43 states have call successors, (43), 21 states have call predecessors, (43), 20 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2024-11-02 12:29:36,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 358 transitions. [2024-11-02 12:29:36,730 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 358 transitions. Word has length 45 [2024-11-02 12:29:36,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:36,731 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 358 transitions. [2024-11-02 12:29:36,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-02 12:29:36,735 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 358 transitions. [2024-11-02 12:29:36,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-02 12:29:36,737 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:36,738 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 12:29:36,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:29:36,738 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:29:36,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:36,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1462924239, now seen corresponding path program 1 times [2024-11-02 12:29:36,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:36,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901128245] [2024-11-02 12:29:36,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:36,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:36,948 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 12:29:36,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:36,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901128245] [2024-11-02 12:29:36,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901128245] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:29:36,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:29:36,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 12:29:36,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795621056] [2024-11-02 12:29:36,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:29:36,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:29:36,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:36,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:29:36,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:29:36,955 INFO L87 Difference]: Start difference. First operand 261 states and 358 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 12:29:37,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:37,899 INFO L93 Difference]: Finished difference Result 663 states and 861 transitions. [2024-11-02 12:29:37,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 12:29:37,900 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 12:29:37,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:37,908 INFO L225 Difference]: With dead ends: 663 [2024-11-02 12:29:37,908 INFO L226 Difference]: Without dead ends: 531 [2024-11-02 12:29:37,909 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-02 12:29:37,911 INFO L432 NwaCegarLoop]: 362 mSDtfsCounter, 764 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:37,912 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [768 Valid, 916 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-02 12:29:37,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2024-11-02 12:29:37,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 447. [2024-11-02 12:29:37,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 328 states have (on average 1.3231707317073171) internal successors, (434), 333 states have internal predecessors, (434), 70 states have call successors, (70), 44 states have call predecessors, (70), 47 states have return successors, (72), 71 states have call predecessors, (72), 68 states have call successors, (72) [2024-11-02 12:29:37,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 576 transitions. [2024-11-02 12:29:37,978 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 576 transitions. Word has length 45 [2024-11-02 12:29:37,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:37,978 INFO L471 AbstractCegarLoop]: Abstraction has 447 states and 576 transitions. [2024-11-02 12:29:37,979 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 12:29:37,979 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 576 transitions. [2024-11-02 12:29:37,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-02 12:29:37,980 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:37,982 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 12:29:37,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:29:37,983 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:29:37,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:37,985 INFO L85 PathProgramCache]: Analyzing trace with hash 349183507, now seen corresponding path program 1 times [2024-11-02 12:29:37,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:37,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323405740] [2024-11-02 12:29:37,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:37,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:38,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:38,290 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 12:29:38,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:38,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323405740] [2024-11-02 12:29:38,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323405740] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:29:38,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:29:38,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-02 12:29:38,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241125589] [2024-11-02 12:29:38,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:29:38,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 12:29:38,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:38,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 12:29:38,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:29:38,297 INFO L87 Difference]: Start difference. First operand 447 states and 576 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 12:29:39,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:39,314 INFO L93 Difference]: Finished difference Result 963 states and 1192 transitions. [2024-11-02 12:29:39,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-02 12:29:39,315 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 12:29:39,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:39,320 INFO L225 Difference]: With dead ends: 963 [2024-11-02 12:29:39,320 INFO L226 Difference]: Without dead ends: 661 [2024-11-02 12:29:39,322 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-11-02 12:29:39,323 INFO L432 NwaCegarLoop]: 169 mSDtfsCounter, 425 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:39,323 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 895 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-02 12:29:39,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2024-11-02 12:29:39,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 626. [2024-11-02 12:29:39,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 453 states have (on average 1.293598233995585) internal successors, (586), 459 states have internal predecessors, (586), 97 states have call successors, (97), 67 states have call predecessors, (97), 74 states have return successors, (103), 101 states have call predecessors, (103), 95 states have call successors, (103) [2024-11-02 12:29:39,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 786 transitions. [2024-11-02 12:29:39,392 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 786 transitions. Word has length 46 [2024-11-02 12:29:39,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:39,393 INFO L471 AbstractCegarLoop]: Abstraction has 626 states and 786 transitions. [2024-11-02 12:29:39,393 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 12:29:39,393 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 786 transitions. [2024-11-02 12:29:39,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-02 12:29:39,395 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:39,395 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 12:29:39,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:29:39,395 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:29:39,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:39,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1377321884, now seen corresponding path program 1 times [2024-11-02 12:29:39,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:39,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667204527] [2024-11-02 12:29:39,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:39,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:39,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:39,483 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 12:29:39,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:39,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667204527] [2024-11-02 12:29:39,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667204527] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:29:39,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:29:39,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:29:39,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722928720] [2024-11-02 12:29:39,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:29:39,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:29:39,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:39,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:29:39,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:29:39,488 INFO L87 Difference]: Start difference. First operand 626 states and 786 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 12:29:39,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:39,718 INFO L93 Difference]: Finished difference Result 1190 states and 1456 transitions. [2024-11-02 12:29:39,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:29:39,719 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 12:29:39,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:39,724 INFO L225 Difference]: With dead ends: 1190 [2024-11-02 12:29:39,724 INFO L226 Difference]: Without dead ends: 758 [2024-11-02 12:29:39,726 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 12:29:39,727 INFO L432 NwaCegarLoop]: 255 mSDtfsCounter, 67 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:39,728 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 479 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:29:39,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2024-11-02 12:29:39,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 653. [2024-11-02 12:29:39,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 476 states have (on average 1.2836134453781514) internal successors, (611), 482 states have internal predecessors, (611), 99 states have call successors, (99), 69 states have call predecessors, (99), 76 states have return successors, (105), 103 states have call predecessors, (105), 97 states have call successors, (105) [2024-11-02 12:29:39,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 815 transitions. [2024-11-02 12:29:39,797 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 815 transitions. Word has length 47 [2024-11-02 12:29:39,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:39,798 INFO L471 AbstractCegarLoop]: Abstraction has 653 states and 815 transitions. [2024-11-02 12:29:39,798 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 12:29:39,798 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 815 transitions. [2024-11-02 12:29:39,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-02 12:29:39,800 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:39,801 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 12:29:39,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:29:39,801 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:29:39,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:39,802 INFO L85 PathProgramCache]: Analyzing trace with hash 2077470130, now seen corresponding path program 1 times [2024-11-02 12:29:39,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:39,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056312778] [2024-11-02 12:29:39,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:39,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:39,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:39,862 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 12:29:39,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:39,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056312778] [2024-11-02 12:29:39,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056312778] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:29:39,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:29:39,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:29:39,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591548055] [2024-11-02 12:29:39,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:29:39,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:29:39,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:39,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:29:39,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:29:39,865 INFO L87 Difference]: Start difference. First operand 653 states and 815 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 12:29:40,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:40,052 INFO L93 Difference]: Finished difference Result 843 states and 1036 transitions. [2024-11-02 12:29:40,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:29:40,053 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 12:29:40,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:40,059 INFO L225 Difference]: With dead ends: 843 [2024-11-02 12:29:40,059 INFO L226 Difference]: Without dead ends: 570 [2024-11-02 12:29:40,060 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 12:29:40,063 INFO L432 NwaCegarLoop]: 257 mSDtfsCounter, 264 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:40,065 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 318 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:29:40,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2024-11-02 12:29:40,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 461. [2024-11-02 12:29:40,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 336 states have (on average 1.2767857142857142) internal successors, (429), 340 states have internal predecessors, (429), 75 states have call successors, (75), 49 states have call predecessors, (75), 48 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2024-11-02 12:29:40,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 577 transitions. [2024-11-02 12:29:40,169 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 577 transitions. Word has length 53 [2024-11-02 12:29:40,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:40,171 INFO L471 AbstractCegarLoop]: Abstraction has 461 states and 577 transitions. [2024-11-02 12:29:40,171 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 12:29:40,171 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 577 transitions. [2024-11-02 12:29:40,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-02 12:29:40,173 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:40,173 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 12:29:40,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 12:29:40,174 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:29:40,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:40,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1581452465, now seen corresponding path program 1 times [2024-11-02 12:29:40,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:40,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787021728] [2024-11-02 12:29:40,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:40,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:40,343 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 12:29:40,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:40,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787021728] [2024-11-02 12:29:40,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787021728] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:29:40,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:29:40,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:29:40,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591011094] [2024-11-02 12:29:40,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:29:40,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:29:40,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:40,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:29:40,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:29:40,349 INFO L87 Difference]: Start difference. First operand 461 states and 577 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 12:29:40,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:40,781 INFO L93 Difference]: Finished difference Result 564 states and 693 transitions. [2024-11-02 12:29:40,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:29:40,782 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 12:29:40,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:40,788 INFO L225 Difference]: With dead ends: 564 [2024-11-02 12:29:40,788 INFO L226 Difference]: Without dead ends: 561 [2024-11-02 12:29:40,789 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 12:29:40,792 INFO L432 NwaCegarLoop]: 249 mSDtfsCounter, 485 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:40,793 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 289 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:29:40,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2024-11-02 12:29:40,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 460. [2024-11-02 12:29:40,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 336 states have (on average 1.2678571428571428) internal successors, (426), 339 states have internal predecessors, (426), 74 states have call successors, (74), 49 states have call predecessors, (74), 48 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2024-11-02 12:29:40,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 573 transitions. [2024-11-02 12:29:40,880 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 573 transitions. Word has length 54 [2024-11-02 12:29:40,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:40,883 INFO L471 AbstractCegarLoop]: Abstraction has 460 states and 573 transitions. [2024-11-02 12:29:40,883 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 12:29:40,884 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 573 transitions. [2024-11-02 12:29:40,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-02 12:29:40,887 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:40,888 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 12:29:40,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 12:29:40,890 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:29:40,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:40,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1779311565, now seen corresponding path program 1 times [2024-11-02 12:29:40,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:40,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542122676] [2024-11-02 12:29:40,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:40,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:40,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:41,114 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 12:29:41,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:41,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542122676] [2024-11-02 12:29:41,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542122676] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:29:41,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419589055] [2024-11-02 12:29:41,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:41,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:29:41,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f26a5-b9ae-46ae-a00a-9cd0faa4fd41/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:29:41,118 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f26a5-b9ae-46ae-a00a-9cd0faa4fd41/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:29:41,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f26a5-b9ae-46ae-a00a-9cd0faa4fd41/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:29:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:41,252 INFO L255 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 12:29:41,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:29:41,610 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 12:29:41,610 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:29:41,735 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 12:29:41,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419589055] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:29:41,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1102816520] [2024-11-02 12:29:41,758 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-02 12:29:41,758 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:29:41,762 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:29:41,768 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:29:41,768 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:29:47,530 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 161 for LOIs [2024-11-02 12:29:47,594 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 157 for LOIs [2024-11-02 12:29:47,647 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 165 for LOIs [2024-11-02 12:29:48,677 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 161 for LOIs [2024-11-02 12:29:48,988 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 161 for LOIs [2024-11-02 12:29:49,318 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 161 for LOIs [2024-11-02 12:29:49,377 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 168 for LOIs [2024-11-02 12:29:49,441 INFO L180 IcfgInterpreter]: Interpretation finished