./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48fbedd-fd5d-40af-a422-c55b557061c4/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48fbedd-fd5d-40af-a422-c55b557061c4/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48fbedd-fd5d-40af-a422-c55b557061c4/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48fbedd-fd5d-40af-a422-c55b557061c4/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48fbedd-fd5d-40af-a422-c55b557061c4/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48fbedd-fd5d-40af-a422-c55b557061c4/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b77809112787d30d81c7c3c0f8f2a230e1ec99494e3dfc2397bd48db4468ad64 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:15:25,351 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:15:25,474 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48fbedd-fd5d-40af-a422-c55b557061c4/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:15:25,484 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:15:25,487 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:15:25,526 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:15:25,527 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:15:25,528 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:15:25,529 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:15:25,534 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:15:25,535 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:15:25,536 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:15:25,537 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:15:25,538 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:15:25,539 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:15:25,539 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:15:25,540 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:15:25,540 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:15:25,541 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:15:25,541 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:15:25,542 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:15:25,542 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:15:25,543 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:15:25,544 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:15:25,544 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:15:25,545 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:15:25,545 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:15:25,546 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:15:25,546 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:15:25,547 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:15:25,548 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:15:25,548 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:15:25,549 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:15:25,549 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:15:25,549 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:15:25,550 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:15:25,550 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:15:25,550 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:15:25,550 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:15:25,551 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:15:25,551 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:15:25,553 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:15:25,553 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:15:25,553 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:15:25,554 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:15:25,554 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:15:25,554 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:15:25,555 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_d48fbedd-fd5d-40af-a422-c55b557061c4/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48fbedd-fd5d-40af-a422-c55b557061c4/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b77809112787d30d81c7c3c0f8f2a230e1ec99494e3dfc2397bd48db4468ad64 [2023-11-23 21:15:25,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:15:25,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:15:25,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:15:25,902 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:15:25,902 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:15:25,904 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48fbedd-fd5d-40af-a422-c55b557061c4/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c [2023-11-23 21:15:29,021 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:15:29,298 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:15:29,299 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48fbedd-fd5d-40af-a422-c55b557061c4/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c [2023-11-23 21:15:29,332 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48fbedd-fd5d-40af-a422-c55b557061c4/bin/utaipan-verify-mE87zJ7Ire/data/165183646/b789674fd5da4129bd31750e681b5fcd/FLAG0d2e29771 [2023-11-23 21:15:29,349 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48fbedd-fd5d-40af-a422-c55b557061c4/bin/utaipan-verify-mE87zJ7Ire/data/165183646/b789674fd5da4129bd31750e681b5fcd [2023-11-23 21:15:29,355 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:15:29,358 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:15:29,363 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:15:29,363 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:15:29,372 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:15:29,373 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:15:29" (1/1) ... [2023-11-23 21:15:29,374 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7844c3af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:29, skipping insertion in model container [2023-11-23 21:15:29,374 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:15:29" (1/1) ... [2023-11-23 21:15:29,462 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:15:29,701 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48fbedd-fd5d-40af-a422-c55b557061c4/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c[913,926] [2023-11-23 21:15:29,786 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48fbedd-fd5d-40af-a422-c55b557061c4/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c[5977,5990] [2023-11-23 21:15:30,014 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:15:30,036 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:15:30,051 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48fbedd-fd5d-40af-a422-c55b557061c4/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c[913,926] [2023-11-23 21:15:30,069 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48fbedd-fd5d-40af-a422-c55b557061c4/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c[5977,5990] [2023-11-23 21:15:30,146 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:15:30,176 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:15:30,177 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:30 WrapperNode [2023-11-23 21:15:30,177 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:15:30,178 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:15:30,179 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:15:30,179 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:15:30,187 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:30" (1/1) ... [2023-11-23 21:15:30,219 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:30" (1/1) ... [2023-11-23 21:15:30,278 INFO L138 Inliner]: procedures = 74, calls = 87, calls flagged for inlining = 49, calls inlined = 49, statements flattened = 1145 [2023-11-23 21:15:30,279 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:15:30,307 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:15:30,307 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:15:30,307 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:15:30,317 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:30" (1/1) ... [2023-11-23 21:15:30,318 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:30" (1/1) ... [2023-11-23 21:15:30,322 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:30" (1/1) ... [2023-11-23 21:15:30,323 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:30" (1/1) ... [2023-11-23 21:15:30,368 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:30" (1/1) ... [2023-11-23 21:15:30,396 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:30" (1/1) ... [2023-11-23 21:15:30,420 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:30" (1/1) ... [2023-11-23 21:15:30,425 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:30" (1/1) ... [2023-11-23 21:15:30,447 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:15:30,448 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:15:30,448 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:15:30,449 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:15:30,450 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:30" (1/1) ... [2023-11-23 21:15:30,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:15:30,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48fbedd-fd5d-40af-a422-c55b557061c4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:30,482 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48fbedd-fd5d-40af-a422-c55b557061c4/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:15:30,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48fbedd-fd5d-40af-a422-c55b557061c4/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:15:30,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:15:30,537 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-23 21:15:30,538 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-23 21:15:30,538 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2023-11-23 21:15:30,538 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2023-11-23 21:15:30,538 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-23 21:15:30,538 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-23 21:15:30,538 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-23 21:15:30,539 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-23 21:15:30,539 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-23 21:15:30,539 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-23 21:15:30,539 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-23 21:15:30,539 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-23 21:15:30,540 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-23 21:15:30,540 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-23 21:15:30,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:15:30,541 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-23 21:15:30,541 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-23 21:15:30,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:15:30,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:15:30,543 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-23 21:15:30,543 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-23 21:15:30,758 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:15:30,761 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:15:31,799 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:15:32,539 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:15:32,539 INFO L309 CfgBuilder]: Removed 20 assume(true) statements. [2023-11-23 21:15:32,541 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:15:32 BoogieIcfgContainer [2023-11-23 21:15:32,542 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:15:32,546 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:15:32,546 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:15:32,550 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:15:32,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:15:29" (1/3) ... [2023-11-23 21:15:32,551 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15a258e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:15:32, skipping insertion in model container [2023-11-23 21:15:32,551 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:30" (2/3) ... [2023-11-23 21:15:32,553 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15a258e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:15:32, skipping insertion in model container [2023-11-23 21:15:32,553 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:15:32" (3/3) ... [2023-11-23 21:15:32,555 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.13.cil-2.c [2023-11-23 21:15:32,578 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:15:32,578 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 21:15:32,664 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:15:32,672 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@41a91348, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:15:32,673 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 21:15:32,681 INFO L276 IsEmpty]: Start isEmpty. Operand has 264 states, 219 states have (on average 1.5296803652968036) internal successors, (335), 224 states have internal predecessors, (335), 33 states have call successors, (33), 9 states have call predecessors, (33), 9 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-23 21:15:32,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 21:15:32,694 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:32,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:32,695 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:32,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:32,703 INFO L85 PathProgramCache]: Analyzing trace with hash -2074039648, now seen corresponding path program 1 times [2023-11-23 21:15:32,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:32,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717880494] [2023-11-23 21:15:32,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:32,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:32,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:33,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:15:33,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:33,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717880494] [2023-11-23 21:15:33,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717880494] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:33,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:15:33,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:15:33,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916175915] [2023-11-23 21:15:33,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:33,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:15:33,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:33,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:15:33,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:15:33,161 INFO L87 Difference]: Start difference. First operand has 264 states, 219 states have (on average 1.5296803652968036) internal successors, (335), 224 states have internal predecessors, (335), 33 states have call successors, (33), 9 states have call predecessors, (33), 9 states have return successors, (33), 32 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) [2023-11-23 21:15:33,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:33,530 INFO L93 Difference]: Finished difference Result 561 states and 850 transitions. [2023-11-23 21:15:33,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:15:33,533 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 [2023-11-23 21:15:33,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:33,558 INFO L225 Difference]: With dead ends: 561 [2023-11-23 21:15:33,559 INFO L226 Difference]: Without dead ends: 297 [2023-11-23 21:15:33,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:15:33,577 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 368 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:33,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 394 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:15:33,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-11-23 21:15:33,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 293. [2023-11-23 21:15:33,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 245 states have (on average 1.4775510204081632) internal successors, (362), 248 states have internal predecessors, (362), 36 states have call successors, (36), 11 states have call predecessors, (36), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-23 21:15:33,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 432 transitions. [2023-11-23 21:15:33,694 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 432 transitions. Word has length 28 [2023-11-23 21:15:33,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:33,694 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 432 transitions. [2023-11-23 21:15:33,695 INFO L496 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) [2023-11-23 21:15:33,695 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 432 transitions. [2023-11-23 21:15:33,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-23 21:15:33,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:33,699 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:33,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:15:33,700 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:33,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:33,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1286932446, now seen corresponding path program 1 times [2023-11-23 21:15:33,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:33,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64659128] [2023-11-23 21:15:33,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:33,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:33,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:33,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:15:33,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:33,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64659128] [2023-11-23 21:15:33,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64659128] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:33,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:15:33,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:15:33,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005487855] [2023-11-23 21:15:33,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:33,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:15:33,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:33,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:15:33,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:15:33,797 INFO L87 Difference]: Start difference. First operand 293 states and 432 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) [2023-11-23 21:15:33,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:33,986 INFO L93 Difference]: Finished difference Result 449 states and 649 transitions. [2023-11-23 21:15:33,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:15:33,987 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 [2023-11-23 21:15:33,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:33,993 INFO L225 Difference]: With dead ends: 449 [2023-11-23 21:15:33,993 INFO L226 Difference]: Without dead ends: 368 [2023-11-23 21:15:33,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:15:33,996 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 366 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:33,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 378 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:15:33,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2023-11-23 21:15:34,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 364. [2023-11-23 21:15:34,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 305 states have (on average 1.4524590163934425) internal successors, (443), 308 states have internal predecessors, (443), 43 states have call successors, (43), 15 states have call predecessors, (43), 14 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2023-11-23 21:15:34,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 527 transitions. [2023-11-23 21:15:34,034 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 527 transitions. Word has length 29 [2023-11-23 21:15:34,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:34,035 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 527 transitions. [2023-11-23 21:15:34,035 INFO L496 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) [2023-11-23 21:15:34,035 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 527 transitions. [2023-11-23 21:15:34,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-23 21:15:34,038 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:34,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:34,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:15:34,039 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:34,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:34,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1551628533, now seen corresponding path program 1 times [2023-11-23 21:15:34,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:34,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315181758] [2023-11-23 21:15:34,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:34,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:34,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:15:34,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:34,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315181758] [2023-11-23 21:15:34,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315181758] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:34,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:15:34,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:15:34,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785970185] [2023-11-23 21:15:34,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:34,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:15:34,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:34,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:15:34,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:15:34,128 INFO L87 Difference]: Start difference. First operand 364 states and 527 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) [2023-11-23 21:15:34,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:34,363 INFO L93 Difference]: Finished difference Result 604 states and 855 transitions. [2023-11-23 21:15:34,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:15:34,364 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 [2023-11-23 21:15:34,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:34,369 INFO L225 Difference]: With dead ends: 604 [2023-11-23 21:15:34,369 INFO L226 Difference]: Without dead ends: 452 [2023-11-23 21:15:34,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:15:34,379 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 46 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:34,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 647 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:15:34,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2023-11-23 21:15:34,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 438. [2023-11-23 21:15:34,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 368 states have (on average 1.434782608695652) internal successors, (528), 373 states have internal predecessors, (528), 49 states have call successors, (49), 20 states have call predecessors, (49), 19 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2023-11-23 21:15:34,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 624 transitions. [2023-11-23 21:15:34,436 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 624 transitions. Word has length 30 [2023-11-23 21:15:34,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:34,438 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 624 transitions. [2023-11-23 21:15:34,438 INFO L496 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) [2023-11-23 21:15:34,439 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 624 transitions. [2023-11-23 21:15:34,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-23 21:15:34,452 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:34,452 INFO L195 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] [2023-11-23 21:15:34,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:15:34,453 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:34,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:34,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1113962417, now seen corresponding path program 1 times [2023-11-23 21:15:34,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:34,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047663029] [2023-11-23 21:15:34,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:34,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:34,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:15:34,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:34,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047663029] [2023-11-23 21:15:34,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047663029] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:34,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:15:34,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:15:34,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233132822] [2023-11-23 21:15:34,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:34,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:15:34,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:34,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:15:34,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:15:34,586 INFO L87 Difference]: Start difference. First operand 438 states and 624 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) [2023-11-23 21:15:34,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:34,769 INFO L93 Difference]: Finished difference Result 601 states and 842 transitions. [2023-11-23 21:15:34,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:15:34,770 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 [2023-11-23 21:15:34,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:34,776 INFO L225 Difference]: With dead ends: 601 [2023-11-23 21:15:34,776 INFO L226 Difference]: Without dead ends: 443 [2023-11-23 21:15:34,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:15:34,778 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 32 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:34,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 681 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:15:34,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2023-11-23 21:15:34,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 432. [2023-11-23 21:15:34,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 362 states have (on average 1.419889502762431) internal successors, (514), 367 states have internal predecessors, (514), 49 states have call successors, (49), 20 states have call predecessors, (49), 19 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2023-11-23 21:15:34,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 610 transitions. [2023-11-23 21:15:34,813 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 610 transitions. Word has length 43 [2023-11-23 21:15:34,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:34,814 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 610 transitions. [2023-11-23 21:15:34,814 INFO L496 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) [2023-11-23 21:15:34,814 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 610 transitions. [2023-11-23 21:15:34,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-23 21:15:34,815 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:34,816 INFO L195 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] [2023-11-23 21:15:34,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:15:34,817 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:34,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:34,817 INFO L85 PathProgramCache]: Analyzing trace with hash 797358252, now seen corresponding path program 1 times [2023-11-23 21:15:34,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:34,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395202470] [2023-11-23 21:15:34,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:34,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 21:15:34,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:34,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395202470] [2023-11-23 21:15:34,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395202470] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:34,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:15:34,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:15:34,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638641229] [2023-11-23 21:15:34,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:34,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:15:34,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:34,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:15:34,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:15:34,943 INFO L87 Difference]: Start difference. First operand 432 states and 610 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) [2023-11-23 21:15:35,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:35,092 INFO L93 Difference]: Finished difference Result 681 states and 934 transitions. [2023-11-23 21:15:35,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:15:35,093 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 [2023-11-23 21:15:35,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:35,097 INFO L225 Difference]: With dead ends: 681 [2023-11-23 21:15:35,098 INFO L226 Difference]: Without dead ends: 478 [2023-11-23 21:15:35,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:15:35,100 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 352 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:35,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 377 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:15:35,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2023-11-23 21:15:35,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 478. [2023-11-23 21:15:35,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 401 states have (on average 1.3890274314214464) internal successors, (557), 406 states have internal predecessors, (557), 53 states have call successors, (53), 23 states have call predecessors, (53), 22 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-23 21:15:35,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 661 transitions. [2023-11-23 21:15:35,137 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 661 transitions. Word has length 46 [2023-11-23 21:15:35,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:35,138 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 661 transitions. [2023-11-23 21:15:35,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2023-11-23 21:15:35,138 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 661 transitions. [2023-11-23 21:15:35,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 21:15:35,140 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:35,140 INFO L195 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] [2023-11-23 21:15:35,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:15:35,140 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:35,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:35,141 INFO L85 PathProgramCache]: Analyzing trace with hash 2063365032, now seen corresponding path program 1 times [2023-11-23 21:15:35,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:35,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11722655] [2023-11-23 21:15:35,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:35,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:35,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 21:15:35,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:35,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11722655] [2023-11-23 21:15:35,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11722655] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:35,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:15:35,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:15:35,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080637159] [2023-11-23 21:15:35,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:35,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:15:35,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:35,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:15:35,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:15:35,306 INFO L87 Difference]: Start difference. First operand 478 states and 661 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) [2023-11-23 21:15:35,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:35,675 INFO L93 Difference]: Finished difference Result 518 states and 708 transitions. [2023-11-23 21:15:35,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:15:35,676 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 [2023-11-23 21:15:35,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:35,681 INFO L225 Difference]: With dead ends: 518 [2023-11-23 21:15:35,681 INFO L226 Difference]: Without dead ends: 515 [2023-11-23 21:15:35,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:15:35,683 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 644 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:35,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [644 Valid, 376 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:15:35,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2023-11-23 21:15:35,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 477. [2023-11-23 21:15:35,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 401 states have (on average 1.3840399002493766) internal successors, (555), 405 states have internal predecessors, (555), 52 states have call successors, (52), 23 states have call predecessors, (52), 22 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-23 21:15:35,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 658 transitions. [2023-11-23 21:15:35,755 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 658 transitions. Word has length 47 [2023-11-23 21:15:35,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:35,756 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 658 transitions. [2023-11-23 21:15:35,756 INFO L496 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) [2023-11-23 21:15:35,756 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 658 transitions. [2023-11-23 21:15:35,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-23 21:15:35,759 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:35,759 INFO L195 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] [2023-11-23 21:15:35,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:15:35,760 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:35,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:35,761 INFO L85 PathProgramCache]: Analyzing trace with hash -461673425, now seen corresponding path program 1 times [2023-11-23 21:15:35,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:35,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864637991] [2023-11-23 21:15:35,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:35,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 21:15:36,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:36,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864637991] [2023-11-23 21:15:36,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864637991] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:15:36,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938081147] [2023-11-23 21:15:36,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:36,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:36,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48fbedd-fd5d-40af-a422-c55b557061c4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:36,057 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48fbedd-fd5d-40af-a422-c55b557061c4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:15:36,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48fbedd-fd5d-40af-a422-c55b557061c4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:15:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:36,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:15:36,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:15:36,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:15:36,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:15:36,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 21:15:36,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938081147] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:15:36,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1561583614] [2023-11-23 21:15:36,726 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2023-11-23 21:15:36,727 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:15:36,732 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:15:36,739 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:15:36,739 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:15:49,673 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 199 for LOIs [2023-11-23 21:15:49,757 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 216 for LOIs [2023-11-23 21:15:49,884 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 262 for LOIs [2023-11-23 21:15:57,247 INFO L180 IcfgInterpreter]: Interpretation finished