./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5 --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 b5bbf318bd4a4e295f88f23f80bb9f32022c2eeb214e815b87206f6eafbbf272 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:40:54,664 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:40:54,770 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-21 19:40:54,777 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:40:54,778 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:40:54,817 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:40:54,818 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:40:54,819 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:40:54,819 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:40:54,820 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:40:54,821 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:40:54,821 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:40:54,822 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:40:54,822 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:40:54,823 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:40:54,823 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:40:54,824 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:40:54,824 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:40:54,825 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:40:54,825 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:40:54,826 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:40:54,826 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:40:54,827 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:40:54,827 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:40:54,828 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:40:54,828 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:40:54,829 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:40:54,829 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:40:54,829 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:40:54,830 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:40:54,830 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:40:54,831 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:40:54,831 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:40:54,831 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:40:54,831 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:40:54,832 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:40:54,832 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:40:54,832 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:40:54,832 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:40:54,833 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:40:54,833 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:40:54,833 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:40:54,833 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:40:54,834 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:40:54,834 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:40:54,834 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:40:54,834 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:40:54,834 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_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b5bbf318bd4a4e295f88f23f80bb9f32022c2eeb214e815b87206f6eafbbf272 [2023-11-21 19:40:55,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:40:55,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:40:55,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:40:55,178 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:40:55,179 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:40:55,180 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-1.c [2023-11-21 19:40:58,265 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:40:58,508 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:40:58,509 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-1.c [2023-11-21 19:40:58,525 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/data/14cf49724/00eaf2e07047466faba171acca4da9d7/FLAG391b1050a [2023-11-21 19:40:58,542 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/data/14cf49724/00eaf2e07047466faba171acca4da9d7 [2023-11-21 19:40:58,549 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:40:58,551 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:40:58,555 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:40:58,556 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:40:58,561 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:40:58,562 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:40:58" (1/1) ... [2023-11-21 19:40:58,563 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ace3d74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:40:58, skipping insertion in model container [2023-11-21 19:40:58,563 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:40:58" (1/1) ... [2023-11-21 19:40:58,639 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:40:58,840 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_11daf4f3-7215-492d-823a-ae9396561bf7/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-1.c[913,926] [2023-11-21 19:40:58,926 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_11daf4f3-7215-492d-823a-ae9396561bf7/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-1.c[5977,5990] [2023-11-21 19:40:59,035 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:40:59,057 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:40:59,078 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_11daf4f3-7215-492d-823a-ae9396561bf7/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-1.c[913,926] [2023-11-21 19:40:59,106 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_11daf4f3-7215-492d-823a-ae9396561bf7/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-1.c[5977,5990] [2023-11-21 19:40:59,170 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:40:59,200 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:40:59,200 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:40:59 WrapperNode [2023-11-21 19:40:59,200 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:40:59,201 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:40:59,201 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:40:59,202 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:40:59,209 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:40:59" (1/1) ... [2023-11-21 19:40:59,228 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:40:59" (1/1) ... [2023-11-21 19:40:59,306 INFO L138 Inliner]: procedures = 58, calls = 63, calls flagged for inlining = 33, calls inlined = 33, statements flattened = 665 [2023-11-21 19:40:59,307 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:40:59,307 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:40:59,307 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:40:59,308 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:40:59,332 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:40:59" (1/1) ... [2023-11-21 19:40:59,332 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:40:59" (1/1) ... [2023-11-21 19:40:59,341 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:40:59" (1/1) ... [2023-11-21 19:40:59,341 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:40:59" (1/1) ... [2023-11-21 19:40:59,358 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:40:59" (1/1) ... [2023-11-21 19:40:59,381 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:40:59" (1/1) ... [2023-11-21 19:40:59,384 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:40:59" (1/1) ... [2023-11-21 19:40:59,388 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:40:59" (1/1) ... [2023-11-21 19:40:59,393 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:40:59,398 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:40:59,398 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:40:59,398 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:40:59,399 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:40:59" (1/1) ... [2023-11-21 19:40:59,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:40:59,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:40:59,445 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:40:59,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:40:59,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:40:59,491 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-21 19:40:59,492 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-21 19:40:59,492 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2023-11-21 19:40:59,492 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2023-11-21 19:40:59,493 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-21 19:40:59,493 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-21 19:40:59,493 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-21 19:40:59,494 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-21 19:40:59,494 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-21 19:40:59,494 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-21 19:40:59,494 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-21 19:40:59,494 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-21 19:40:59,495 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-21 19:40:59,495 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-21 19:40:59,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:40:59,496 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-21 19:40:59,496 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-21 19:40:59,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:40:59,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:40:59,498 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-21 19:40:59,498 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-21 19:40:59,637 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:40:59,640 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:41:00,444 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:41:00,840 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:41:00,841 INFO L308 CfgBuilder]: Removed 12 assume(true) statements. [2023-11-21 19:41:00,842 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:41:00 BoogieIcfgContainer [2023-11-21 19:41:00,843 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:41:00,846 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:41:00,846 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:41:00,849 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:41:00,849 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:40:58" (1/3) ... [2023-11-21 19:41:00,850 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dec26ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:41:00, skipping insertion in model container [2023-11-21 19:41:00,850 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:40:59" (2/3) ... [2023-11-21 19:41:00,852 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dec26ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:41:00, skipping insertion in model container [2023-11-21 19:41:00,852 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:41:00" (3/3) ... [2023-11-21 19:41:00,854 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.05.cil-1.c [2023-11-21 19:41:00,873 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:41:00,874 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-21 19:41:00,946 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:41:00,954 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;@11173b8f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:41:00,954 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-21 19:41:00,961 INFO L276 IsEmpty]: Start isEmpty. Operand has 168 states, 131 states have (on average 1.5190839694656488) internal successors, (199), 136 states have internal predecessors, (199), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-21 19:41:00,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-21 19:41:00,973 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:00,975 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] [2023-11-21 19:41:00,975 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:41:00,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:00,983 INFO L85 PathProgramCache]: Analyzing trace with hash -555480241, now seen corresponding path program 1 times [2023-11-21 19:41:00,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:00,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426213021] [2023-11-21 19:41:00,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:00,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:01,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:01,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:01,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426213021] [2023-11-21 19:41:01,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426213021] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:01,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:01,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:41:01,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782271842] [2023-11-21 19:41:01,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:01,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:41:01,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:01,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:41:01,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:41:01,460 INFO L87 Difference]: Start difference. First operand has 168 states, 131 states have (on average 1.5190839694656488) internal successors, (199), 136 states have internal predecessors, (199), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) 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) [2023-11-21 19:41:01,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:01,639 INFO L93 Difference]: Finished difference Result 369 states and 546 transitions. [2023-11-21 19:41:01,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:41:01,642 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 [2023-11-21 19:41:01,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:01,656 INFO L225 Difference]: With dead ends: 369 [2023-11-21 19:41:01,656 INFO L226 Difference]: Without dead ends: 201 [2023-11-21 19:41:01,661 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 [2023-11-21 19:41:01,665 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 216 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:01,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 266 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:41:01,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-11-21 19:41:01,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 197. [2023-11-21 19:41:01,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 157 states have (on average 1.4394904458598725) internal successors, (226), 160 states have internal predecessors, (226), 28 states have call successors, (28), 11 states have call predecessors, (28), 10 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-21 19:41:01,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 280 transitions. [2023-11-21 19:41:01,737 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 280 transitions. Word has length 28 [2023-11-21 19:41:01,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:01,738 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 280 transitions. [2023-11-21 19:41:01,738 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) [2023-11-21 19:41:01,738 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 280 transitions. [2023-11-21 19:41:01,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-21 19:41:01,743 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:01,743 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] [2023-11-21 19:41:01,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:41:01,744 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:41:01,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:01,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1342113907, now seen corresponding path program 1 times [2023-11-21 19:41:01,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:01,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296584259] [2023-11-21 19:41:01,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:01,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:01,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:01,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:01,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296584259] [2023-11-21 19:41:01,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296584259] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:01,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:01,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:41:01,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017026546] [2023-11-21 19:41:01,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:01,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:41:01,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:01,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:41:01,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:41:01,902 INFO L87 Difference]: Start difference. First operand 197 states and 280 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) [2023-11-21 19:41:02,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:02,040 INFO L93 Difference]: Finished difference Result 353 states and 497 transitions. [2023-11-21 19:41:02,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:41:02,040 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 [2023-11-21 19:41:02,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:02,046 INFO L225 Difference]: With dead ends: 353 [2023-11-21 19:41:02,046 INFO L226 Difference]: Without dead ends: 272 [2023-11-21 19:41:02,047 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 [2023-11-21 19:41:02,049 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 214 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:02,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 250 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:41:02,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-11-21 19:41:02,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 268. [2023-11-21 19:41:02,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 217 states have (on average 1.4147465437788018) internal successors, (307), 220 states have internal predecessors, (307), 35 states have call successors, (35), 15 states have call predecessors, (35), 14 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-21 19:41:02,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 375 transitions. [2023-11-21 19:41:02,092 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 375 transitions. Word has length 29 [2023-11-21 19:41:02,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:02,092 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 375 transitions. [2023-11-21 19:41:02,092 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) [2023-11-21 19:41:02,092 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 375 transitions. [2023-11-21 19:41:02,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-21 19:41:02,096 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:02,097 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] [2023-11-21 19:41:02,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 19:41:02,097 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:41:02,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:02,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1889229290, now seen corresponding path program 1 times [2023-11-21 19:41:02,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:02,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890487759] [2023-11-21 19:41:02,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:02,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:02,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:02,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:02,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890487759] [2023-11-21 19:41:02,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890487759] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:02,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:02,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:41:02,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757264560] [2023-11-21 19:41:02,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:02,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:41:02,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:02,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:41:02,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:41:02,167 INFO L87 Difference]: Start difference. First operand 268 states and 375 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) [2023-11-21 19:41:02,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:02,283 INFO L93 Difference]: Finished difference Result 508 states and 703 transitions. [2023-11-21 19:41:02,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:41:02,284 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 [2023-11-21 19:41:02,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:02,287 INFO L225 Difference]: With dead ends: 508 [2023-11-21 19:41:02,287 INFO L226 Difference]: Without dead ends: 356 [2023-11-21 19:41:02,289 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 [2023-11-21 19:41:02,290 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 46 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:02,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 391 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:41:02,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2023-11-21 19:41:02,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 342. [2023-11-21 19:41:02,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 280 states have (on average 1.4) internal successors, (392), 285 states have internal predecessors, (392), 41 states have call successors, (41), 20 states have call predecessors, (41), 19 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-21 19:41:02,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 472 transitions. [2023-11-21 19:41:02,329 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 472 transitions. Word has length 30 [2023-11-21 19:41:02,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:02,330 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 472 transitions. [2023-11-21 19:41:02,330 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) [2023-11-21 19:41:02,330 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 472 transitions. [2023-11-21 19:41:02,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-21 19:41:02,333 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:02,333 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] [2023-11-21 19:41:02,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 19:41:02,334 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:41:02,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:02,334 INFO L85 PathProgramCache]: Analyzing trace with hash -388686911, now seen corresponding path program 1 times [2023-11-21 19:41:02,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:02,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055268892] [2023-11-21 19:41:02,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:02,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:02,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 19:41:02,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:02,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055268892] [2023-11-21 19:41:02,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055268892] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:02,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:02,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:41:02,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380783612] [2023-11-21 19:41:02,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:02,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:41:02,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:02,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:41:02,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:41:02,461 INFO L87 Difference]: Start difference. First operand 342 states and 472 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) [2023-11-21 19:41:02,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:02,562 INFO L93 Difference]: Finished difference Result 505 states and 690 transitions. [2023-11-21 19:41:02,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:41:02,562 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 [2023-11-21 19:41:02,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:02,566 INFO L225 Difference]: With dead ends: 505 [2023-11-21 19:41:02,567 INFO L226 Difference]: Without dead ends: 347 [2023-11-21 19:41:02,568 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 [2023-11-21 19:41:02,569 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 32 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:02,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 425 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:41:02,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2023-11-21 19:41:02,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 336. [2023-11-21 19:41:02,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 274 states have (on average 1.3795620437956204) internal successors, (378), 279 states have internal predecessors, (378), 41 states have call successors, (41), 20 states have call predecessors, (41), 19 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-21 19:41:02,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 458 transitions. [2023-11-21 19:41:02,620 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 458 transitions. Word has length 43 [2023-11-21 19:41:02,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:02,621 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 458 transitions. [2023-11-21 19:41:02,621 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) [2023-11-21 19:41:02,622 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 458 transitions. [2023-11-21 19:41:02,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-21 19:41:02,624 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:02,625 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:41:02,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 19:41:02,625 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:41:02,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:02,626 INFO L85 PathProgramCache]: Analyzing trace with hash 582496780, now seen corresponding path program 1 times [2023-11-21 19:41:02,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:02,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331341213] [2023-11-21 19:41:02,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:02,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:02,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:02,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:02,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331341213] [2023-11-21 19:41:02,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331341213] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:02,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:02,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 19:41:02,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174926173] [2023-11-21 19:41:02,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:02,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:41:02,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:02,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:41:02,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:41:02,855 INFO L87 Difference]: Start difference. First operand 336 states and 458 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 19:41:03,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:03,558 INFO L93 Difference]: Finished difference Result 859 states and 1268 transitions. [2023-11-21 19:41:03,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:41:03,559 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2023-11-21 19:41:03,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:03,570 INFO L225 Difference]: With dead ends: 859 [2023-11-21 19:41:03,570 INFO L226 Difference]: Without dead ends: 749 [2023-11-21 19:41:03,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:41:03,577 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 811 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:03,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [811 Valid, 771 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 19:41:03,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2023-11-21 19:41:03,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 738. [2023-11-21 19:41:03,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 595 states have (on average 1.4050420168067226) internal successors, (836), 603 states have internal predecessors, (836), 98 states have call successors, (98), 44 states have call predecessors, (98), 43 states have return successors, (130), 91 states have call predecessors, (130), 96 states have call successors, (130) [2023-11-21 19:41:03,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1064 transitions. [2023-11-21 19:41:03,677 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1064 transitions. Word has length 46 [2023-11-21 19:41:03,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:03,679 INFO L495 AbstractCegarLoop]: Abstraction has 738 states and 1064 transitions. [2023-11-21 19:41:03,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 19:41:03,679 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1064 transitions. [2023-11-21 19:41:03,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-21 19:41:03,683 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:03,685 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] [2023-11-21 19:41:03,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 19:41:03,685 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:41:03,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:03,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1680753989, now seen corresponding path program 1 times [2023-11-21 19:41:03,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:03,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422180132] [2023-11-21 19:41:03,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:03,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:03,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-21 19:41:03,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:03,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422180132] [2023-11-21 19:41:03,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422180132] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:03,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:03,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:41:03,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418662071] [2023-11-21 19:41:03,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:03,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:41:03,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:03,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:41:03,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:41:03,781 INFO L87 Difference]: Start difference. First operand 738 states and 1064 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) [2023-11-21 19:41:03,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:03,927 INFO L93 Difference]: Finished difference Result 987 states and 1388 transitions. [2023-11-21 19:41:03,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:41:03,928 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 [2023-11-21 19:41:03,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:03,935 INFO L225 Difference]: With dead ends: 987 [2023-11-21 19:41:03,935 INFO L226 Difference]: Without dead ends: 784 [2023-11-21 19:41:03,936 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 [2023-11-21 19:41:03,941 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 200 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:03,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 249 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:41:03,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2023-11-21 19:41:04,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 784. [2023-11-21 19:41:04,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 634 states have (on average 1.386435331230284) internal successors, (879), 642 states have internal predecessors, (879), 102 states have call successors, (102), 47 states have call predecessors, (102), 46 states have return successors, (134), 95 states have call predecessors, (134), 100 states have call successors, (134) [2023-11-21 19:41:04,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1115 transitions. [2023-11-21 19:41:04,032 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1115 transitions. Word has length 46 [2023-11-21 19:41:04,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:04,033 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 1115 transitions. [2023-11-21 19:41:04,033 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) [2023-11-21 19:41:04,033 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1115 transitions. [2023-11-21 19:41:04,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-21 19:41:04,036 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:04,036 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] [2023-11-21 19:41:04,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 19:41:04,037 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:41:04,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:04,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1934314841, now seen corresponding path program 1 times [2023-11-21 19:41:04,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:04,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935411786] [2023-11-21 19:41:04,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:04,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:04,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:04,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-21 19:41:04,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:04,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935411786] [2023-11-21 19:41:04,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935411786] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:04,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:04,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:41:04,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734841473] [2023-11-21 19:41:04,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:04,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:41:04,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:04,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:41:04,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:41:04,131 INFO L87 Difference]: Start difference. First operand 784 states and 1115 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) [2023-11-21 19:41:04,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:04,378 INFO L93 Difference]: Finished difference Result 824 states and 1162 transitions. [2023-11-21 19:41:04,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:41:04,379 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 [2023-11-21 19:41:04,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:04,385 INFO L225 Difference]: With dead ends: 824 [2023-11-21 19:41:04,385 INFO L226 Difference]: Without dead ends: 821 [2023-11-21 19:41:04,386 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 [2023-11-21 19:41:04,390 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 372 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:04,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 248 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:41:04,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2023-11-21 19:41:04,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 783. [2023-11-21 19:41:04,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 634 states have (on average 1.3832807570977919) internal successors, (877), 641 states have internal predecessors, (877), 101 states have call successors, (101), 47 states have call predecessors, (101), 46 states have return successors, (134), 95 states have call predecessors, (134), 100 states have call successors, (134) [2023-11-21 19:41:04,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1112 transitions. [2023-11-21 19:41:04,507 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1112 transitions. Word has length 47 [2023-11-21 19:41:04,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:04,508 INFO L495 AbstractCegarLoop]: Abstraction has 783 states and 1112 transitions. [2023-11-21 19:41:04,509 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) [2023-11-21 19:41:04,509 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1112 transitions. [2023-11-21 19:41:04,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-21 19:41:04,510 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:04,510 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] [2023-11-21 19:41:04,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 19:41:04,512 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:41:04,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:04,513 INFO L85 PathProgramCache]: Analyzing trace with hash 164896776, now seen corresponding path program 1 times [2023-11-21 19:41:04,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:04,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085432633] [2023-11-21 19:41:04,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:04,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:04,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-21 19:41:04,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:04,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085432633] [2023-11-21 19:41:04,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085432633] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:41:04,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388039716] [2023-11-21 19:41:04,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:04,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:41:04,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:41:04,711 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:41:04,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:41:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:04,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 19:41:04,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:41:05,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:05,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:41:05,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-21 19:41:05,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388039716] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:41:05,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1386898269] [2023-11-21 19:41:05,163 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2023-11-21 19:41:05,163 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:41:05,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:41:05,172 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:41:05,172 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:41:11,581 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 111 for LOIs [2023-11-21 19:41:11,621 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 136 for LOIs [2023-11-21 19:41:11,696 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 122 for LOIs [2023-11-21 19:41:13,926 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:41:34,705 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10453#(and (= ~t5_i~0 0) (<= 1 |#StackHeapBarrier|) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~q_buf_0~0 0) (= ~t1_pc~0 0) (not (= ~p_num_write~0 1)) (= ~T4_E~0 2) (= ~p_last_write~0 0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (= ~c_last_read~0 0) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= ~t2_i~0 0) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (<= ~p_num_write~0 1) (= ~m_i~0 0) (= ~p_dw_pc~0 1) (= ~q_write_ev~0 2) (= ~E_2~0 2) (= ~p_dw_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (= ~q_read_ev~0 2) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~1#1_BEFORE_CALL_4| Int)) (and (<= |v_ULTIMATE.start_eval1_~tmp___0~1#1_BEFORE_CALL_4| 2147483647) (<= 0 (+ 2147483648 |v_ULTIMATE.start_eval1_~tmp___0~1#1_BEFORE_CALL_4|)) (not (= 0 |v_ULTIMATE.start_eval1_~tmp___0~1#1_BEFORE_CALL_4|)))) (= 0 ~t2_pc~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~M_E~0 2) (= ~t1_i~0 0))' at error location [2023-11-21 19:41:34,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:41:34,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:41:34,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-11-21 19:41:34,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855499609] [2023-11-21 19:41:34,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 19:41:34,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 19:41:34,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:34,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 19:41:34,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2023-11-21 19:41:34,721 INFO L87 Difference]: Start difference. First operand 783 states and 1112 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-21 19:41:35,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:35,093 INFO L93 Difference]: Finished difference Result 1226 states and 1680 transitions. [2023-11-21 19:41:35,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 19:41:35,094 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2023-11-21 19:41:35,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:35,104 INFO L225 Difference]: With dead ends: 1226 [2023-11-21 19:41:35,105 INFO L226 Difference]: Without dead ends: 1223 [2023-11-21 19:41:35,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2023-11-21 19:41:35,109 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 349 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:35,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 786 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:41:35,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2023-11-21 19:41:35,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 992. [2023-11-21 19:41:35,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 811 states have (on average 1.3686806411837238) internal successors, (1110), 820 states have internal predecessors, (1110), 120 states have call successors, (120), 60 states have call predecessors, (120), 59 states have return successors, (153), 112 states have call predecessors, (153), 119 states have call successors, (153) [2023-11-21 19:41:35,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1383 transitions. [2023-11-21 19:41:35,211 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1383 transitions. Word has length 48 [2023-11-21 19:41:35,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:35,211 INFO L495 AbstractCegarLoop]: Abstraction has 992 states and 1383 transitions. [2023-11-21 19:41:35,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-21 19:41:35,212 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1383 transitions. [2023-11-21 19:41:35,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-21 19:41:35,214 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:35,214 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2023-11-21 19:41:35,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 19:41:35,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-21 19:41:35,429 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:41:35,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:35,430 INFO L85 PathProgramCache]: Analyzing trace with hash -669031248, now seen corresponding path program 2 times [2023-11-21 19:41:35,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:35,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516316215] [2023-11-21 19:41:35,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:35,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:35,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:35,476 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-21 19:41:35,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:35,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516316215] [2023-11-21 19:41:35,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516316215] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:35,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:35,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:41:35,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381168670] [2023-11-21 19:41:35,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:35,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:41:35,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:35,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:41:35,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:41:35,479 INFO L87 Difference]: Start difference. First operand 992 states and 1383 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-21 19:41:35,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:35,615 INFO L93 Difference]: Finished difference Result 1322 states and 1816 transitions. [2023-11-21 19:41:35,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:41:35,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 61 [2023-11-21 19:41:35,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:35,629 INFO L225 Difference]: With dead ends: 1322 [2023-11-21 19:41:35,629 INFO L226 Difference]: Without dead ends: 934 [2023-11-21 19:41:35,630 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 [2023-11-21 19:41:35,633 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 213 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:35,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 265 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:41:35,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2023-11-21 19:41:35,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 925. [2023-11-21 19:41:35,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 754 states have (on average 1.3647214854111407) internal successors, (1029), 764 states have internal predecessors, (1029), 114 states have call successors, (114), 56 states have call predecessors, (114), 55 states have return successors, (147), 105 states have call predecessors, (147), 113 states have call successors, (147) [2023-11-21 19:41:35,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1290 transitions. [2023-11-21 19:41:35,717 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1290 transitions. Word has length 61 [2023-11-21 19:41:35,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:35,718 INFO L495 AbstractCegarLoop]: Abstraction has 925 states and 1290 transitions. [2023-11-21 19:41:35,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-21 19:41:35,718 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1290 transitions. [2023-11-21 19:41:35,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-21 19:41:35,721 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:35,722 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:41:35,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 19:41:35,722 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:41:35,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:35,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2061663341, now seen corresponding path program 1 times [2023-11-21 19:41:35,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:35,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110150400] [2023-11-21 19:41:35,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:35,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:35,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:35,892 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 19:41:35,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:35,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110150400] [2023-11-21 19:41:35,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110150400] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:41:35,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124030460] [2023-11-21 19:41:35,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:35,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:41:35,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:41:35,896 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:41:35,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 19:41:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:36,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:41:36,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:41:36,040 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-21 19:41:36,040 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:41:36,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124030460] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:36,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:41:36,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-21 19:41:36,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054868543] [2023-11-21 19:41:36,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:36,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:41:36,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:36,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:41:36,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:41:36,043 INFO L87 Difference]: Start difference. First operand 925 states and 1290 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-21 19:41:36,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:36,172 INFO L93 Difference]: Finished difference Result 1052 states and 1449 transitions. [2023-11-21 19:41:36,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:41:36,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 73 [2023-11-21 19:41:36,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:36,177 INFO L225 Difference]: With dead ends: 1052 [2023-11-21 19:41:36,177 INFO L226 Difference]: Without dead ends: 518 [2023-11-21 19:41:36,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:41:36,179 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 25 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:36,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 396 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:41:36,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2023-11-21 19:41:36,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 518. [2023-11-21 19:41:36,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 411 states have (on average 1.4282238442822384) internal successors, (587), 415 states have internal predecessors, (587), 76 states have call successors, (76), 30 states have call predecessors, (76), 30 states have return successors, (110), 73 states have call predecessors, (110), 76 states have call successors, (110) [2023-11-21 19:41:36,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 773 transitions. [2023-11-21 19:41:36,226 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 773 transitions. Word has length 73 [2023-11-21 19:41:36,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:36,227 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 773 transitions. [2023-11-21 19:41:36,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-21 19:41:36,227 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 773 transitions. [2023-11-21 19:41:36,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-21 19:41:36,230 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:36,230 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:41:36,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-21 19:41:36,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:41:36,451 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:41:36,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:36,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1634061366, now seen corresponding path program 1 times [2023-11-21 19:41:36,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:36,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198791310] [2023-11-21 19:41:36,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:36,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:36,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:36,587 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 19:41:36,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:36,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198791310] [2023-11-21 19:41:36,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198791310] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:41:36,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543291219] [2023-11-21 19:41:36,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:36,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:41:36,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:41:36,590 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:41:36,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 19:41:36,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:36,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:41:36,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:41:36,789 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-21 19:41:36,789 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:41:36,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543291219] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:36,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:41:36,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-21 19:41:36,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615426270] [2023-11-21 19:41:36,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:36,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:41:36,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:36,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:41:36,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:41:36,792 INFO L87 Difference]: Start difference. First operand 518 states and 773 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 19:41:36,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:36,942 INFO L93 Difference]: Finished difference Result 1526 states and 2338 transitions. [2023-11-21 19:41:36,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:41:36,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2023-11-21 19:41:36,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:36,953 INFO L225 Difference]: With dead ends: 1526 [2023-11-21 19:41:36,954 INFO L226 Difference]: Without dead ends: 1014 [2023-11-21 19:41:36,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:41:36,959 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 139 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:36,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 263 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:41:36,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2023-11-21 19:41:37,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 1007. [2023-11-21 19:41:37,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 803 states have (on average 1.419676214196762) internal successors, (1140), 810 states have internal predecessors, (1140), 143 states have call successors, (143), 60 states have call predecessors, (143), 60 states have return successors, (207), 137 states have call predecessors, (207), 143 states have call successors, (207) [2023-11-21 19:41:37,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 1490 transitions. [2023-11-21 19:41:37,063 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 1490 transitions. Word has length 88 [2023-11-21 19:41:37,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:37,063 INFO L495 AbstractCegarLoop]: Abstraction has 1007 states and 1490 transitions. [2023-11-21 19:41:37,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 19:41:37,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 1490 transitions. [2023-11-21 19:41:37,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-21 19:41:37,067 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:37,067 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:41:37,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 19:41:37,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-21 19:41:37,282 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:41:37,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:37,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1122726280, now seen corresponding path program 1 times [2023-11-21 19:41:37,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:37,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198049857] [2023-11-21 19:41:37,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:37,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:37,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 19:41:37,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:37,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198049857] [2023-11-21 19:41:37,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198049857] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:41:37,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546277751] [2023-11-21 19:41:37,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:37,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:41:37,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:41:37,408 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:41:37,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 19:41:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:37,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:41:37,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:41:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 19:41:37,626 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:41:37,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546277751] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:37,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:41:37,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-21 19:41:37,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281867449] [2023-11-21 19:41:37,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:37,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:41:37,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:37,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:41:37,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:41:37,631 INFO L87 Difference]: Start difference. First operand 1007 states and 1490 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 19:41:37,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:37,850 INFO L93 Difference]: Finished difference Result 2978 states and 4518 transitions. [2023-11-21 19:41:37,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:41:37,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2023-11-21 19:41:37,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:37,865 INFO L225 Difference]: With dead ends: 2978 [2023-11-21 19:41:37,865 INFO L226 Difference]: Without dead ends: 1977 [2023-11-21 19:41:37,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:41:37,871 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 133 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:37,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 263 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:41:37,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2023-11-21 19:41:38,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 1965. [2023-11-21 19:41:38,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1572 states have (on average 1.4096692111959288) internal successors, (2216), 1585 states have internal predecessors, (2216), 272 states have call successors, (272), 120 states have call predecessors, (272), 120 states have return successors, (392), 260 states have call predecessors, (392), 272 states have call successors, (392) [2023-11-21 19:41:38,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 2880 transitions. [2023-11-21 19:41:38,077 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 2880 transitions. Word has length 88 [2023-11-21 19:41:38,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:38,077 INFO L495 AbstractCegarLoop]: Abstraction has 1965 states and 2880 transitions. [2023-11-21 19:41:38,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 19:41:38,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 2880 transitions. [2023-11-21 19:41:38,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-21 19:41:38,081 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:38,082 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:41:38,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 19:41:38,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-21 19:41:38,302 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:41:38,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:38,302 INFO L85 PathProgramCache]: Analyzing trace with hash -713730618, now seen corresponding path program 1 times [2023-11-21 19:41:38,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:38,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561723948] [2023-11-21 19:41:38,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:38,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:38,390 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-21 19:41:38,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:38,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561723948] [2023-11-21 19:41:38,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561723948] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:38,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:38,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:41:38,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430802152] [2023-11-21 19:41:38,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:38,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:41:38,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:38,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:41:38,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:41:38,394 INFO L87 Difference]: Start difference. First operand 1965 states and 2880 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-21 19:41:38,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:38,632 INFO L93 Difference]: Finished difference Result 4007 states and 5993 transitions. [2023-11-21 19:41:38,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:41:38,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 88 [2023-11-21 19:41:38,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:38,655 INFO L225 Difference]: With dead ends: 4007 [2023-11-21 19:41:38,655 INFO L226 Difference]: Without dead ends: 2437 [2023-11-21 19:41:38,662 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 [2023-11-21 19:41:38,663 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 70 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:38,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 353 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:41:38,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2023-11-21 19:41:38,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 2257. [2023-11-21 19:41:38,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 1848 states have (on average 1.4350649350649352) internal successors, (2652), 1861 states have internal predecessors, (2652), 280 states have call successors, (280), 128 states have call predecessors, (280), 128 states have return successors, (400), 268 states have call predecessors, (400), 280 states have call successors, (400) [2023-11-21 19:41:38,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3332 transitions. [2023-11-21 19:41:38,868 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3332 transitions. Word has length 88 [2023-11-21 19:41:38,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:38,869 INFO L495 AbstractCegarLoop]: Abstraction has 2257 states and 3332 transitions. [2023-11-21 19:41:38,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-21 19:41:38,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3332 transitions. [2023-11-21 19:41:38,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-21 19:41:38,879 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:38,879 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:41:38,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-21 19:41:38,879 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:41:38,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:38,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1194823734, now seen corresponding path program 1 times [2023-11-21 19:41:38,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:38,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256499213] [2023-11-21 19:41:38,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:38,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:38,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-21 19:41:38,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:38,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256499213] [2023-11-21 19:41:38,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256499213] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:38,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:38,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:41:38,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823676254] [2023-11-21 19:41:38,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:38,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:41:38,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:38,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:41:38,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:41:38,975 INFO L87 Difference]: Start difference. First operand 2257 states and 3332 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-21 19:41:39,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:39,331 INFO L93 Difference]: Finished difference Result 6670 states and 10037 transitions. [2023-11-21 19:41:39,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:41:39,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 118 [2023-11-21 19:41:39,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:39,365 INFO L225 Difference]: With dead ends: 6670 [2023-11-21 19:41:39,365 INFO L226 Difference]: Without dead ends: 4419 [2023-11-21 19:41:39,376 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 [2023-11-21 19:41:39,376 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 132 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:39,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 265 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:41:39,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4419 states. [2023-11-21 19:41:39,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4419 to 4389. [2023-11-21 19:41:39,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4389 states, 3596 states have (on average 1.4204671857619577) internal successors, (5108), 3621 states have internal predecessors, (5108), 536 states have call successors, (536), 256 states have call predecessors, (536), 256 states have return successors, (760), 512 states have call predecessors, (760), 536 states have call successors, (760) [2023-11-21 19:41:39,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4389 states to 4389 states and 6404 transitions. [2023-11-21 19:41:39,786 INFO L78 Accepts]: Start accepts. Automaton has 4389 states and 6404 transitions. Word has length 118 [2023-11-21 19:41:39,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:39,786 INFO L495 AbstractCegarLoop]: Abstraction has 4389 states and 6404 transitions. [2023-11-21 19:41:39,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-21 19:41:39,787 INFO L276 IsEmpty]: Start isEmpty. Operand 4389 states and 6404 transitions. [2023-11-21 19:41:39,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-21 19:41:39,804 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:39,804 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:41:39,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-21 19:41:39,805 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:41:39,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:39,805 INFO L85 PathProgramCache]: Analyzing trace with hash 52776216, now seen corresponding path program 1 times [2023-11-21 19:41:39,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:39,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320991995] [2023-11-21 19:41:39,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:39,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:39,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:39,889 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-21 19:41:39,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:39,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320991995] [2023-11-21 19:41:39,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320991995] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:39,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:39,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:41:39,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273395523] [2023-11-21 19:41:39,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:39,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:41:39,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:39,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:41:39,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:41:39,893 INFO L87 Difference]: Start difference. First operand 4389 states and 6404 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-21 19:41:40,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:40,535 INFO L93 Difference]: Finished difference Result 12978 states and 19277 transitions. [2023-11-21 19:41:40,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:41:40,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 118 [2023-11-21 19:41:40,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:40,595 INFO L225 Difference]: With dead ends: 12978 [2023-11-21 19:41:40,595 INFO L226 Difference]: Without dead ends: 8595 [2023-11-21 19:41:40,613 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 [2023-11-21 19:41:40,614 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 134 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:40,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 269 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:41:40,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8595 states. [2023-11-21 19:41:41,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8595 to 8537. [2023-11-21 19:41:41,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8537 states, 6996 states have (on average 1.4048027444253859) internal successors, (9828), 7045 states have internal predecessors, (9828), 1028 states have call successors, (1028), 512 states have call predecessors, (1028), 512 states have return successors, (1444), 980 states have call predecessors, (1444), 1028 states have call successors, (1444) [2023-11-21 19:41:41,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8537 states to 8537 states and 12300 transitions. [2023-11-21 19:41:41,321 INFO L78 Accepts]: Start accepts. Automaton has 8537 states and 12300 transitions. Word has length 118 [2023-11-21 19:41:41,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:41,322 INFO L495 AbstractCegarLoop]: Abstraction has 8537 states and 12300 transitions. [2023-11-21 19:41:41,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-21 19:41:41,323 INFO L276 IsEmpty]: Start isEmpty. Operand 8537 states and 12300 transitions. [2023-11-21 19:41:41,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-21 19:41:41,360 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:41,361 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:41:41,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-21 19:41:41,361 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:41:41,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:41,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1133309706, now seen corresponding path program 1 times [2023-11-21 19:41:41,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:41,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803245769] [2023-11-21 19:41:41,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:41,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:41,536 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-21 19:41:41,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:41,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803245769] [2023-11-21 19:41:41,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803245769] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:41:41,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569865231] [2023-11-21 19:41:41,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:41,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:41:41,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:41:41,541 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:41:41,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 19:41:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:41,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:41:41,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:41:41,802 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-21 19:41:41,802 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:41:41,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569865231] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:41,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:41:41,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-21 19:41:41,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693417184] [2023-11-21 19:41:41,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:41,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:41:41,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:41,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:41:41,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:41:41,805 INFO L87 Difference]: Start difference. First operand 8537 states and 12300 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-21 19:41:42,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:42,489 INFO L93 Difference]: Finished difference Result 15636 states and 22593 transitions. [2023-11-21 19:41:42,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:41:42,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 138 [2023-11-21 19:41:42,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:42,539 INFO L225 Difference]: With dead ends: 15636 [2023-11-21 19:41:42,539 INFO L226 Difference]: Without dead ends: 10594 [2023-11-21 19:41:42,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:41:42,566 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 126 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:42,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 190 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:41:42,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10594 states. [2023-11-21 19:41:43,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10594 to 10594. [2023-11-21 19:41:43,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10594 states, 8818 states have (on average 1.371966432297573) internal successors, (12098), 8867 states have internal predecessors, (12098), 1105 states have call successors, (1105), 669 states have call predecessors, (1105), 670 states have return successors, (1583), 1058 states have call predecessors, (1583), 1105 states have call successors, (1583) [2023-11-21 19:41:43,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10594 states to 10594 states and 14786 transitions. [2023-11-21 19:41:43,453 INFO L78 Accepts]: Start accepts. Automaton has 10594 states and 14786 transitions. Word has length 138 [2023-11-21 19:41:43,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:43,453 INFO L495 AbstractCegarLoop]: Abstraction has 10594 states and 14786 transitions. [2023-11-21 19:41:43,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-21 19:41:43,454 INFO L276 IsEmpty]: Start isEmpty. Operand 10594 states and 14786 transitions. [2023-11-21 19:41:43,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-21 19:41:43,493 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:43,493 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:41:43,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 19:41:43,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-21 19:41:43,708 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:41:43,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:43,708 INFO L85 PathProgramCache]: Analyzing trace with hash -443248053, now seen corresponding path program 1 times [2023-11-21 19:41:43,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:43,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96380312] [2023-11-21 19:41:43,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:43,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:43,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:43,866 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-21 19:41:43,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:43,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96380312] [2023-11-21 19:41:43,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96380312] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:41:43,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441422994] [2023-11-21 19:41:43,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:43,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:41:43,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:41:43,868 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:41:43,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11daf4f3-7215-492d-823a-ae9396561bf7/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 19:41:44,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:44,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:41:44,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:41:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-21 19:41:44,087 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:41:44,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441422994] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:44,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:41:44,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-21 19:41:44,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314476087] [2023-11-21 19:41:44,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:44,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:41:44,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:44,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:41:44,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:41:44,090 INFO L87 Difference]: Start difference. First operand 10594 states and 14786 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-21 19:41:44,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:44,900 INFO L93 Difference]: Finished difference Result 20215 states and 28608 transitions. [2023-11-21 19:41:44,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:41:44,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 138 [2023-11-21 19:41:44,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:44,961 INFO L225 Difference]: With dead ends: 20215 [2023-11-21 19:41:44,961 INFO L226 Difference]: Without dead ends: 14809 [2023-11-21 19:41:44,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:41:44,983 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 101 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:44,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 380 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:41:45,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14809 states.