./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.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_bc387c9d-4921-4e25-bb24-fb11ba5911c4/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc387c9d-4921-4e25-bb24-fb11ba5911c4/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_bc387c9d-4921-4e25-bb24-fb11ba5911c4/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc387c9d-4921-4e25-bb24-fb11ba5911c4/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc387c9d-4921-4e25-bb24-fb11ba5911c4/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_bc387c9d-4921-4e25-bb24-fb11ba5911c4/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 ff5431a1a166986f09cf6e8d9d49f276cd283b8e2ac68f401ad73509be5780b8 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 11:25:58,193 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 11:25:58,255 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc387c9d-4921-4e25-bb24-fb11ba5911c4/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 11:25:58,260 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 11:25:58,260 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 11:25:58,295 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 11:25:58,295 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 11:25:58,296 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 11:25:58,296 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 11:25:58,297 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 11:25:58,297 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 11:25:58,298 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 11:25:58,298 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 11:25:58,299 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 11:25:58,299 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 11:25:58,299 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 11:25:58,300 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 11:25:58,300 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 11:25:58,301 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 11:25:58,301 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 11:25:58,302 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 11:25:58,305 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 11:25:58,306 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 11:25:58,306 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 11:25:58,307 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 11:25:58,307 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 11:25:58,307 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 11:25:58,312 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 11:25:58,313 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 11:25:58,313 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 11:25:58,314 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 11:25:58,314 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 11:25:58,314 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 11:25:58,314 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 11:25:58,315 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 11:25:58,315 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 11:25:58,315 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 11:25:58,315 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 11:25:58,316 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:25:58,316 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 11:25:58,317 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 11:25:58,320 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 11:25:58,320 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 11:25:58,321 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 11:25:58,321 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 11:25:58,321 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 11:25:58,321 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 11:25:58,321 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_bc387c9d-4921-4e25-bb24-fb11ba5911c4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc387c9d-4921-4e25-bb24-fb11ba5911c4/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff5431a1a166986f09cf6e8d9d49f276cd283b8e2ac68f401ad73509be5780b8 [2024-11-02 11:25:58,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 11:25:58,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 11:25:58,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 11:25:58,629 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 11:25:58,629 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 11:25:58,631 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc387c9d-4921-4e25-bb24-fb11ba5911c4/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c Unable to find full path for "g++" [2024-11-02 11:26:00,848 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 11:26:01,176 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 11:26:01,177 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc387c9d-4921-4e25-bb24-fb11ba5911c4/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c [2024-11-02 11:26:01,209 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc387c9d-4921-4e25-bb24-fb11ba5911c4/bin/utaipan-verify-DbMuA5NWw2/data/4ee6a10ad/8dfa0b236599423b9440e67074a4047e/FLAGda245baee [2024-11-02 11:26:01,241 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc387c9d-4921-4e25-bb24-fb11ba5911c4/bin/utaipan-verify-DbMuA5NWw2/data/4ee6a10ad/8dfa0b236599423b9440e67074a4047e [2024-11-02 11:26:01,243 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 11:26:01,244 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 11:26:01,246 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 11:26:01,246 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 11:26:01,252 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 11:26:01,252 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:26:01" (1/1) ... [2024-11-02 11:26:01,253 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b93800e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:01, skipping insertion in model container [2024-11-02 11:26:01,253 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:26:01" (1/1) ... [2024-11-02 11:26:01,324 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 11:26:01,601 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_bc387c9d-4921-4e25-bb24-fb11ba5911c4/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c[913,926] [2024-11-02 11:26:01,687 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_bc387c9d-4921-4e25-bb24-fb11ba5911c4/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c[5977,5990] [2024-11-02 11:26:01,803 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:26:01,817 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 11:26:01,830 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_bc387c9d-4921-4e25-bb24-fb11ba5911c4/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c[913,926] [2024-11-02 11:26:01,847 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_bc387c9d-4921-4e25-bb24-fb11ba5911c4/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c[5977,5990] [2024-11-02 11:26:01,924 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:26:01,962 INFO L204 MainTranslator]: Completed translation [2024-11-02 11:26:01,963 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:01 WrapperNode [2024-11-02 11:26:01,963 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 11:26:01,964 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 11:26:01,965 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 11:26:01,965 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 11:26:01,973 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:01" (1/1) ... [2024-11-02 11:26:01,994 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:01" (1/1) ... [2024-11-02 11:26:02,078 INFO L138 Inliner]: procedures = 70, calls = 82, calls flagged for inlining = 44, calls inlined = 44, statements flattened = 1029 [2024-11-02 11:26:02,082 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 11:26:02,088 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 11:26:02,090 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 11:26:02,090 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 11:26:02,104 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:01" (1/1) ... [2024-11-02 11:26:02,104 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:01" (1/1) ... [2024-11-02 11:26:02,109 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:01" (1/1) ... [2024-11-02 11:26:02,110 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:01" (1/1) ... [2024-11-02 11:26:02,142 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:01" (1/1) ... [2024-11-02 11:26:02,159 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:01" (1/1) ... [2024-11-02 11:26:02,164 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:01" (1/1) ... [2024-11-02 11:26:02,175 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:01" (1/1) ... [2024-11-02 11:26:02,189 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 11:26:02,194 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 11:26:02,194 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 11:26:02,194 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 11:26:02,195 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:01" (1/1) ... [2024-11-02 11:26:02,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:26:02,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc387c9d-4921-4e25-bb24-fb11ba5911c4/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:26:02,258 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc387c9d-4921-4e25-bb24-fb11ba5911c4/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 11:26:02,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc387c9d-4921-4e25-bb24-fb11ba5911c4/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 11:26:02,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 11:26:02,306 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-02 11:26:02,307 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-02 11:26:02,307 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2024-11-02 11:26:02,307 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2024-11-02 11:26:02,307 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-02 11:26:02,307 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-02 11:26:02,308 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-02 11:26:02,308 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-02 11:26:02,308 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-02 11:26:02,308 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-02 11:26:02,308 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-02 11:26:02,309 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-02 11:26:02,309 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-02 11:26:02,309 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-02 11:26:02,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 11:26:02,309 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-02 11:26:02,310 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-02 11:26:02,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 11:26:02,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 11:26:02,312 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-02 11:26:02,312 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-02 11:26:02,312 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2024-11-02 11:26:02,312 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2024-11-02 11:26:02,460 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 11:26:02,462 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 11:26:03,894 INFO L? ?]: Removed 125 outVars from TransFormulas that were not future-live. [2024-11-02 11:26:03,894 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 11:26:04,541 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 11:26:04,541 INFO L316 CfgBuilder]: Removed 18 assume(true) statements. [2024-11-02 11:26:04,542 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:26:04 BoogieIcfgContainer [2024-11-02 11:26:04,542 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 11:26:04,544 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 11:26:04,544 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 11:26:04,548 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 11:26:04,548 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:26:01" (1/3) ... [2024-11-02 11:26:04,549 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35fdea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:26:04, skipping insertion in model container [2024-11-02 11:26:04,549 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:01" (2/3) ... [2024-11-02 11:26:04,550 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35fdea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:26:04, skipping insertion in model container [2024-11-02 11:26:04,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:26:04" (3/3) ... [2024-11-02 11:26:04,551 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.11.cil-1.c [2024-11-02 11:26:04,571 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 11:26:04,572 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-02 11:26:04,644 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 11:26:04,655 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;@7805eea7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 11:26:04,656 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-02 11:26:04,661 INFO L276 IsEmpty]: Start isEmpty. Operand has 246 states, 200 states have (on average 1.535) internal successors, (307), 207 states have internal predecessors, (307), 33 states have call successors, (33), 10 states have call predecessors, (33), 10 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2024-11-02 11:26:04,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-02 11:26:04,671 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:04,672 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] [2024-11-02 11:26:04,672 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:04,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:04,678 INFO L85 PathProgramCache]: Analyzing trace with hash -648801726, now seen corresponding path program 1 times [2024-11-02 11:26:04,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:04,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629856019] [2024-11-02 11:26:04,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:04,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:05,110 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 11:26:05,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:05,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629856019] [2024-11-02 11:26:05,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629856019] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:26:05,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:26:05,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:26:05,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939712374] [2024-11-02 11:26:05,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:26:05,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:26:05,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:05,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:26:05,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:26:05,160 INFO L87 Difference]: Start difference. First operand has 246 states, 200 states have (on average 1.535) internal successors, (307), 207 states have internal predecessors, (307), 33 states have call successors, (33), 10 states have call predecessors, (33), 10 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 11:26:05,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:05,475 INFO L93 Difference]: Finished difference Result 524 states and 794 transitions. [2024-11-02 11:26:05,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:26:05,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2024-11-02 11:26:05,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:05,494 INFO L225 Difference]: With dead ends: 524 [2024-11-02 11:26:05,494 INFO L226 Difference]: Without dead ends: 278 [2024-11-02 11:26:05,500 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 11:26:05,507 INFO L432 NwaCegarLoop]: 314 mSDtfsCounter, 338 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:26:05,509 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 369 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:26:05,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2024-11-02 11:26:05,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 274. [2024-11-02 11:26:05,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 226 states have (on average 1.4778761061946903) internal successors, (334), 230 states have internal predecessors, (334), 36 states have call successors, (36), 12 states have call predecessors, (36), 10 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-02 11:26:05,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 402 transitions. [2024-11-02 11:26:05,596 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 402 transitions. Word has length 28 [2024-11-02 11:26:05,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:05,596 INFO L471 AbstractCegarLoop]: Abstraction has 274 states and 402 transitions. [2024-11-02 11:26:05,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 11:26:05,597 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 402 transitions. [2024-11-02 11:26:05,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-02 11:26:05,599 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:05,599 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] [2024-11-02 11:26:05,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 11:26:05,600 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:05,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:05,601 INFO L85 PathProgramCache]: Analyzing trace with hash 399779432, now seen corresponding path program 1 times [2024-11-02 11:26:05,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:05,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734624550] [2024-11-02 11:26:05,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:05,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:05,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:05,710 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 11:26:05,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:05,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734624550] [2024-11-02 11:26:05,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734624550] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:26:05,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:26:05,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:26:05,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082600961] [2024-11-02 11:26:05,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:26:05,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:26:05,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:05,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:26:05,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:26:05,715 INFO L87 Difference]: Start difference. First operand 274 states and 402 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 11:26:05,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:05,886 INFO L93 Difference]: Finished difference Result 430 states and 619 transitions. [2024-11-02 11:26:05,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:26:05,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2024-11-02 11:26:05,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:05,891 INFO L225 Difference]: With dead ends: 430 [2024-11-02 11:26:05,895 INFO L226 Difference]: Without dead ends: 349 [2024-11-02 11:26:05,896 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 11:26:05,897 INFO L432 NwaCegarLoop]: 300 mSDtfsCounter, 336 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:26:05,898 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 353 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:26:05,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-11-02 11:26:05,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 345. [2024-11-02 11:26:05,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 286 states have (on average 1.451048951048951) internal successors, (415), 290 states have internal predecessors, (415), 43 states have call successors, (43), 16 states have call predecessors, (43), 14 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2024-11-02 11:26:05,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 497 transitions. [2024-11-02 11:26:05,954 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 497 transitions. Word has length 29 [2024-11-02 11:26:05,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:05,955 INFO L471 AbstractCegarLoop]: Abstraction has 345 states and 497 transitions. [2024-11-02 11:26:05,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 11:26:05,955 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 497 transitions. [2024-11-02 11:26:05,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-02 11:26:05,959 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:05,960 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] [2024-11-02 11:26:05,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 11:26:05,960 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:05,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:05,961 INFO L85 PathProgramCache]: Analyzing trace with hash -615151790, now seen corresponding path program 1 times [2024-11-02 11:26:05,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:05,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356469217] [2024-11-02 11:26:05,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:05,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:05,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:06,056 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 11:26:06,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:06,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356469217] [2024-11-02 11:26:06,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356469217] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:26:06,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:26:06,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:26:06,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554415017] [2024-11-02 11:26:06,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:26:06,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:26:06,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:06,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:26:06,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:26:06,063 INFO L87 Difference]: Start difference. First operand 345 states and 497 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 11:26:06,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:06,296 INFO L93 Difference]: Finished difference Result 585 states and 825 transitions. [2024-11-02 11:26:06,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:26:06,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2024-11-02 11:26:06,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:06,300 INFO L225 Difference]: With dead ends: 585 [2024-11-02 11:26:06,302 INFO L226 Difference]: Without dead ends: 433 [2024-11-02 11:26:06,304 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 11:26:06,306 INFO L432 NwaCegarLoop]: 312 mSDtfsCounter, 46 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:26:06,310 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 597 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:26:06,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2024-11-02 11:26:06,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 419. [2024-11-02 11:26:06,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 349 states have (on average 1.4326647564469914) internal successors, (500), 355 states have internal predecessors, (500), 49 states have call successors, (49), 21 states have call predecessors, (49), 19 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2024-11-02 11:26:06,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 594 transitions. [2024-11-02 11:26:06,378 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 594 transitions. Word has length 30 [2024-11-02 11:26:06,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:06,380 INFO L471 AbstractCegarLoop]: Abstraction has 419 states and 594 transitions. [2024-11-02 11:26:06,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 11:26:06,380 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 594 transitions. [2024-11-02 11:26:06,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-02 11:26:06,382 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:06,382 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] [2024-11-02 11:26:06,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 11:26:06,382 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:06,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:06,387 INFO L85 PathProgramCache]: Analyzing trace with hash 256369949, now seen corresponding path program 1 times [2024-11-02 11:26:06,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:06,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285109750] [2024-11-02 11:26:06,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:06,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:06,524 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 11:26:06,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:06,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285109750] [2024-11-02 11:26:06,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285109750] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:26:06,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:26:06,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:26:06,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090138225] [2024-11-02 11:26:06,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:26:06,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:26:06,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:06,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:26:06,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:26:06,527 INFO L87 Difference]: Start difference. First operand 419 states and 594 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 11:26:06,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:06,718 INFO L93 Difference]: Finished difference Result 582 states and 812 transitions. [2024-11-02 11:26:06,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:26:06,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2024-11-02 11:26:06,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:06,723 INFO L225 Difference]: With dead ends: 582 [2024-11-02 11:26:06,723 INFO L226 Difference]: Without dead ends: 424 [2024-11-02 11:26:06,724 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 11:26:06,725 INFO L432 NwaCegarLoop]: 333 mSDtfsCounter, 32 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:26:06,725 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 631 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:26:06,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2024-11-02 11:26:06,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 413. [2024-11-02 11:26:06,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 343 states have (on average 1.4169096209912537) internal successors, (486), 349 states have internal predecessors, (486), 49 states have call successors, (49), 21 states have call predecessors, (49), 19 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2024-11-02 11:26:06,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 580 transitions. [2024-11-02 11:26:06,752 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 580 transitions. Word has length 43 [2024-11-02 11:26:06,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:06,753 INFO L471 AbstractCegarLoop]: Abstraction has 413 states and 580 transitions. [2024-11-02 11:26:06,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 11:26:06,755 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 580 transitions. [2024-11-02 11:26:06,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-02 11:26:06,759 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:06,759 INFO L215 NwaCegarLoop]: trace histogram [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 11:26:06,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 11:26:06,760 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:06,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:06,761 INFO L85 PathProgramCache]: Analyzing trace with hash -2100100732, now seen corresponding path program 1 times [2024-11-02 11:26:06,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:06,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292952293] [2024-11-02 11:26:06,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:06,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:06,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-02 11:26:06,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:06,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292952293] [2024-11-02 11:26:06,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292952293] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:26:06,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:26:06,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:26:06,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734260039] [2024-11-02 11:26:06,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:26:06,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:26:06,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:06,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:26:06,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:26:06,838 INFO L87 Difference]: Start difference. First operand 413 states and 580 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 11:26:07,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:07,004 INFO L93 Difference]: Finished difference Result 662 states and 904 transitions. [2024-11-02 11:26:07,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:26:07,005 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2024-11-02 11:26:07,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:07,010 INFO L225 Difference]: With dead ends: 662 [2024-11-02 11:26:07,010 INFO L226 Difference]: Without dead ends: 459 [2024-11-02 11:26:07,012 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 11:26:07,013 INFO L432 NwaCegarLoop]: 300 mSDtfsCounter, 322 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:26:07,013 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 352 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:26:07,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2024-11-02 11:26:07,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 459. [2024-11-02 11:26:07,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 382 states have (on average 1.3848167539267016) internal successors, (529), 388 states have internal predecessors, (529), 53 states have call successors, (53), 24 states have call predecessors, (53), 22 states have return successors, (49), 47 states have call predecessors, (49), 49 states have call successors, (49) [2024-11-02 11:26:07,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 631 transitions. [2024-11-02 11:26:07,057 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 631 transitions. Word has length 46 [2024-11-02 11:26:07,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:07,058 INFO L471 AbstractCegarLoop]: Abstraction has 459 states and 631 transitions. [2024-11-02 11:26:07,058 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 11:26:07,059 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 631 transitions. [2024-11-02 11:26:07,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-02 11:26:07,061 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:07,062 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-02 11:26:07,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 11:26:07,062 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:07,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:07,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1224508151, now seen corresponding path program 1 times [2024-11-02 11:26:07,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:07,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396176964] [2024-11-02 11:26:07,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:07,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:07,150 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-02 11:26:07,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:07,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396176964] [2024-11-02 11:26:07,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396176964] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:26:07,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:26:07,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 11:26:07,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121323166] [2024-11-02 11:26:07,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:26:07,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 11:26:07,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:07,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 11:26:07,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:26:07,153 INFO L87 Difference]: Start difference. First operand 459 states and 631 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 11:26:07,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:07,573 INFO L93 Difference]: Finished difference Result 686 states and 931 transitions. [2024-11-02 11:26:07,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 11:26:07,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2024-11-02 11:26:07,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:07,579 INFO L225 Difference]: With dead ends: 686 [2024-11-02 11:26:07,579 INFO L226 Difference]: Without dead ends: 457 [2024-11-02 11:26:07,581 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 11:26:07,581 INFO L432 NwaCegarLoop]: 331 mSDtfsCounter, 377 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 11:26:07,582 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 592 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 11:26:07,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2024-11-02 11:26:07,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 455. [2024-11-02 11:26:07,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 378 states have (on average 1.3571428571428572) internal successors, (513), 384 states have internal predecessors, (513), 53 states have call successors, (53), 24 states have call predecessors, (53), 22 states have return successors, (49), 47 states have call predecessors, (49), 49 states have call successors, (49) [2024-11-02 11:26:07,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 615 transitions. [2024-11-02 11:26:07,635 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 615 transitions. Word has length 47 [2024-11-02 11:26:07,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:07,635 INFO L471 AbstractCegarLoop]: Abstraction has 455 states and 615 transitions. [2024-11-02 11:26:07,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 11:26:07,636 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 615 transitions. [2024-11-02 11:26:07,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-02 11:26:07,638 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:07,638 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-02 11:26:07,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 11:26:07,638 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:07,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:07,639 INFO L85 PathProgramCache]: Analyzing trace with hash -351669496, now seen corresponding path program 1 times [2024-11-02 11:26:07,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:07,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721035915] [2024-11-02 11:26:07,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:07,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:07,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 11:26:07,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:07,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721035915] [2024-11-02 11:26:07,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721035915] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:26:07,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:26:07,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 11:26:07,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212509819] [2024-11-02 11:26:07,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:26:07,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 11:26:07,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:07,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 11:26:07,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:26:07,778 INFO L87 Difference]: Start difference. First operand 455 states and 615 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 11:26:08,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:08,104 INFO L93 Difference]: Finished difference Result 491 states and 656 transitions. [2024-11-02 11:26:08,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 11:26:08,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2024-11-02 11:26:08,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:08,108 INFO L225 Difference]: With dead ends: 491 [2024-11-02 11:26:08,109 INFO L226 Difference]: Without dead ends: 488 [2024-11-02 11:26:08,109 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 11:26:08,110 INFO L432 NwaCegarLoop]: 307 mSDtfsCounter, 584 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 11:26:08,110 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 346 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 11:26:08,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2024-11-02 11:26:08,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 454. [2024-11-02 11:26:08,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 378 states have (on average 1.3518518518518519) internal successors, (511), 383 states have internal predecessors, (511), 52 states have call successors, (52), 24 states have call predecessors, (52), 22 states have return successors, (49), 47 states have call predecessors, (49), 49 states have call successors, (49) [2024-11-02 11:26:08,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 612 transitions. [2024-11-02 11:26:08,156 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 612 transitions. Word has length 47 [2024-11-02 11:26:08,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:08,156 INFO L471 AbstractCegarLoop]: Abstraction has 454 states and 612 transitions. [2024-11-02 11:26:08,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 11:26:08,157 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 612 transitions. [2024-11-02 11:26:08,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-02 11:26:08,158 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:08,158 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-02 11:26:08,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-02 11:26:08,159 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:08,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:08,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1981788455, now seen corresponding path program 1 times [2024-11-02 11:26:08,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:08,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600873551] [2024-11-02 11:26:08,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:08,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 11:26:08,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:08,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600873551] [2024-11-02 11:26:08,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600873551] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:26:08,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195368834] [2024-11-02 11:26:08,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:08,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:26:08,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc387c9d-4921-4e25-bb24-fb11ba5911c4/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:26:08,349 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc387c9d-4921-4e25-bb24-fb11ba5911c4/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:26:08,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc387c9d-4921-4e25-bb24-fb11ba5911c4/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 11:26:08,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:08,491 INFO L255 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 11:26:08,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:26:08,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:26:08,853 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:26:08,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 11:26:08,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195368834] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 11:26:08,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [179154415] [2024-11-02 11:26:08,985 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2024-11-02 11:26:08,985 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:26:08,989 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:26:08,995 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:26:08,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 11:26:19,158 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 171 for LOIs [2024-11-02 11:26:19,217 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 196 for LOIs [2024-11-02 11:26:19,322 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 182 for LOIs [2024-11-02 11:26:23,422 INFO L180 IcfgInterpreter]: Interpretation finished