./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.06.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/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_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.06.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/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_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/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 0515a0092ae60bee69c0826328a56fce70547e074096ceb561e2dff3da2ff25f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:45:22,264 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:45:22,327 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-21 19:45:22,333 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:45:22,334 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:45:22,357 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:45:22,358 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:45:22,359 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:45:22,360 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:45:22,360 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:45:22,361 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:45:22,362 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:45:22,362 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:45:22,363 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:45:22,363 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:45:22,364 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:45:22,364 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:45:22,365 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:45:22,366 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:45:22,366 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:45:22,367 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:45:22,368 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:45:22,368 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:45:22,369 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:45:22,370 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:45:22,370 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:45:22,371 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:45:22,371 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:45:22,372 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:45:22,372 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:45:22,373 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:45:22,373 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:45:22,374 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:45:22,374 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:45:22,375 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:45:22,375 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:45:22,376 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:45:22,376 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:45:22,377 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:45:22,377 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:45:22,378 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:45:22,378 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:45:22,379 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:45:22,379 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:45:22,380 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:45:22,380 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:45:22,380 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:45:22,381 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_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0515a0092ae60bee69c0826328a56fce70547e074096ceb561e2dff3da2ff25f [2023-11-21 19:45:22,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:45:22,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:45:22,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:45:22,712 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:45:22,713 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:45:22,714 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.06.cil-2.c [2023-11-21 19:45:25,810 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:45:26,059 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:45:26,060 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.06.cil-2.c [2023-11-21 19:45:26,085 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/bin/utaipan-verify-QoSU8krkJ5/data/4ced908f3/fa2a12158b3345f593688178f63ad4bb/FLAG5d48f743c [2023-11-21 19:45:26,103 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/bin/utaipan-verify-QoSU8krkJ5/data/4ced908f3/fa2a12158b3345f593688178f63ad4bb [2023-11-21 19:45:26,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:45:26,112 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:45:26,115 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:45:26,115 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:45:26,120 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:45:26,122 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:45:26" (1/1) ... [2023-11-21 19:45:26,123 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30eda215 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:26, skipping insertion in model container [2023-11-21 19:45:26,123 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:45:26" (1/1) ... [2023-11-21 19:45:26,194 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:45:26,367 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_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.06.cil-2.c[911,924] [2023-11-21 19:45:26,448 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_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.06.cil-2.c[8416,8429] [2023-11-21 19:45:26,515 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:45:26,528 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:45:26,541 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_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.06.cil-2.c[911,924] [2023-11-21 19:45:26,576 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_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.06.cil-2.c[8416,8429] [2023-11-21 19:45:26,624 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:45:26,660 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:45:26,660 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:26 WrapperNode [2023-11-21 19:45:26,660 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:45:26,661 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:45:26,662 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:45:26,662 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:45:26,669 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:26" (1/1) ... [2023-11-21 19:45:26,684 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:26" (1/1) ... [2023-11-21 19:45:26,740 INFO L138 Inliner]: procedures = 67, calls = 79, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 748 [2023-11-21 19:45:26,741 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:45:26,742 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:45:26,742 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:45:26,742 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:45:26,752 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:26" (1/1) ... [2023-11-21 19:45:26,752 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:26" (1/1) ... [2023-11-21 19:45:26,757 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:26" (1/1) ... [2023-11-21 19:45:26,757 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:26" (1/1) ... [2023-11-21 19:45:26,772 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:26" (1/1) ... [2023-11-21 19:45:26,783 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:26" (1/1) ... [2023-11-21 19:45:26,788 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:26" (1/1) ... [2023-11-21 19:45:26,792 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:26" (1/1) ... [2023-11-21 19:45:26,797 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:45:26,810 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:45:26,810 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:45:26,811 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:45:26,811 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:26" (1/1) ... [2023-11-21 19:45:26,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:45:26,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:45:26,839 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:45:26,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:45:26,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:45:26,887 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-21 19:45:26,887 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-21 19:45:26,888 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-11-21 19:45:26,888 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-11-21 19:45:26,888 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-21 19:45:26,888 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-21 19:45:26,889 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-21 19:45:26,889 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-21 19:45:26,889 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-11-21 19:45:26,889 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-11-21 19:45:26,889 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-21 19:45:26,889 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-21 19:45:26,890 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-21 19:45:26,890 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-21 19:45:26,890 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-11-21 19:45:26,890 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-11-21 19:45:26,890 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-11-21 19:45:26,891 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-11-21 19:45:26,891 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-11-21 19:45:26,891 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-11-21 19:45:26,891 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-21 19:45:26,891 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-21 19:45:26,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:45:26,893 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-21 19:45:26,893 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-21 19:45:26,893 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-11-21 19:45:26,894 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-11-21 19:45:26,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:45:26,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:45:26,894 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-21 19:45:26,894 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-21 19:45:27,017 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:45:27,019 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:45:27,801 INFO L774 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2023-11-21 19:45:27,802 INFO L774 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2023-11-21 19:45:27,881 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:45:28,315 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:45:28,315 INFO L308 CfgBuilder]: Removed 13 assume(true) statements. [2023-11-21 19:45:28,317 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:45:28 BoogieIcfgContainer [2023-11-21 19:45:28,317 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:45:28,320 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:45:28,320 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:45:28,324 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:45:28,324 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:45:26" (1/3) ... [2023-11-21 19:45:28,325 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19f3074c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:45:28, skipping insertion in model container [2023-11-21 19:45:28,325 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:26" (2/3) ... [2023-11-21 19:45:28,327 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19f3074c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:45:28, skipping insertion in model container [2023-11-21 19:45:28,327 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:45:28" (3/3) ... [2023-11-21 19:45:28,328 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.06.cil-2.c [2023-11-21 19:45:28,347 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:45:28,348 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-21 19:45:28,419 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:45:28,426 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;@652e8dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:45:28,427 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-21 19:45:28,432 INFO L276 IsEmpty]: Start isEmpty. Operand has 208 states, 155 states have (on average 1.4967741935483871) internal successors, (232), 161 states have internal predecessors, (232), 36 states have call successors, (36), 14 states have call predecessors, (36), 14 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2023-11-21 19:45:28,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-21 19:45:28,442 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:45:28,443 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] [2023-11-21 19:45:28,443 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:45:28,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:45:28,448 INFO L85 PathProgramCache]: Analyzing trace with hash 976146394, now seen corresponding path program 1 times [2023-11-21 19:45:28,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:45:28,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557753662] [2023-11-21 19:45:28,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:28,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:45:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:45:28,866 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 19:45:28,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:45:28,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557753662] [2023-11-21 19:45:28,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557753662] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:45:28,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:45:28,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:45:28,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004834521] [2023-11-21 19:45:28,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:45:28,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:45:28,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:45:28,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:45:28,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:45:28,932 INFO L87 Difference]: Start difference. First operand has 208 states, 155 states have (on average 1.4967741935483871) internal successors, (232), 161 states have internal predecessors, (232), 36 states have call successors, (36), 14 states have call predecessors, (36), 14 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-21 19:45:29,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:45:29,447 INFO L93 Difference]: Finished difference Result 539 states and 786 transitions. [2023-11-21 19:45:29,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:45:29,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2023-11-21 19:45:29,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:45:29,464 INFO L225 Difference]: With dead ends: 539 [2023-11-21 19:45:29,464 INFO L226 Difference]: Without dead ends: 332 [2023-11-21 19:45:29,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:45:29,473 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 356 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:45:29,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 528 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:45:29,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2023-11-21 19:45:29,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 321. [2023-11-21 19:45:29,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 236 states have (on average 1.4067796610169492) internal successors, (332), 240 states have internal predecessors, (332), 56 states have call successors, (56), 28 states have call predecessors, (56), 27 states have return successors, (57), 54 states have call predecessors, (57), 54 states have call successors, (57) [2023-11-21 19:45:29,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 445 transitions. [2023-11-21 19:45:29,557 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 445 transitions. Word has length 44 [2023-11-21 19:45:29,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:45:29,558 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 445 transitions. [2023-11-21 19:45:29,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-21 19:45:29,558 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 445 transitions. [2023-11-21 19:45:29,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-21 19:45:29,561 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:45:29,561 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] [2023-11-21 19:45:29,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:45:29,562 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:45:29,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:45:29,563 INFO L85 PathProgramCache]: Analyzing trace with hash -28917169, now seen corresponding path program 1 times [2023-11-21 19:45:29,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:45:29,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061207909] [2023-11-21 19:45:29,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:29,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:45:29,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:45:29,729 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 19:45:29,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:45:29,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061207909] [2023-11-21 19:45:29,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061207909] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:45:29,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:45:29,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 19:45:29,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408216589] [2023-11-21 19:45:29,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:45:29,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:45:29,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:45:29,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:45:29,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:45:29,734 INFO L87 Difference]: Start difference. First operand 321 states and 445 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-21 19:45:30,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:45:30,550 INFO L93 Difference]: Finished difference Result 858 states and 1168 transitions. [2023-11-21 19:45:30,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 19:45:30,551 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2023-11-21 19:45:30,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:45:30,556 INFO L225 Difference]: With dead ends: 858 [2023-11-21 19:45:30,556 INFO L226 Difference]: Without dead ends: 392 [2023-11-21 19:45:30,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-21 19:45:30,560 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 796 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 19:45:30,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [804 Valid, 903 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 19:45:30,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2023-11-21 19:45:30,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 307. [2023-11-21 19:45:30,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 222 states have (on average 1.3468468468468469) internal successors, (299), 226 states have internal predecessors, (299), 56 states have call successors, (56), 28 states have call predecessors, (56), 27 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-21 19:45:30,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 409 transitions. [2023-11-21 19:45:30,601 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 409 transitions. Word has length 45 [2023-11-21 19:45:30,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:45:30,602 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 409 transitions. [2023-11-21 19:45:30,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-21 19:45:30,602 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 409 transitions. [2023-11-21 19:45:30,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-21 19:45:30,604 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:45:30,605 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 19:45:30,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 19:45:30,605 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:45:30,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:45:30,606 INFO L85 PathProgramCache]: Analyzing trace with hash 508631427, now seen corresponding path program 1 times [2023-11-21 19:45:30,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:45:30,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318473104] [2023-11-21 19:45:30,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:30,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:45:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:45:30,935 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 19:45:30,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:45:30,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318473104] [2023-11-21 19:45:30,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318473104] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:45:30,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:45:30,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 19:45:30,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790530537] [2023-11-21 19:45:30,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:45:30,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 19:45:30,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:45:30,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 19:45:30,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 19:45:30,939 INFO L87 Difference]: Start difference. First operand 307 states and 409 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-21 19:45:31,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:45:31,759 INFO L93 Difference]: Finished difference Result 609 states and 777 transitions. [2023-11-21 19:45:31,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-21 19:45:31,760 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2023-11-21 19:45:31,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:45:31,764 INFO L225 Difference]: With dead ends: 609 [2023-11-21 19:45:31,764 INFO L226 Difference]: Without dead ends: 435 [2023-11-21 19:45:31,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-21 19:45:31,766 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 421 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 19:45:31,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 729 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 19:45:31,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2023-11-21 19:45:31,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 409. [2023-11-21 19:45:31,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 290 states have (on average 1.313793103448276) internal successors, (381), 294 states have internal predecessors, (381), 76 states have call successors, (76), 42 states have call predecessors, (76), 41 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2023-11-21 19:45:31,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 531 transitions. [2023-11-21 19:45:31,822 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 531 transitions. Word has length 46 [2023-11-21 19:45:31,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:45:31,822 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 531 transitions. [2023-11-21 19:45:31,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-21 19:45:31,823 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 531 transitions. [2023-11-21 19:45:31,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-21 19:45:31,825 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:45:31,825 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, 1] [2023-11-21 19:45:31,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 19:45:31,825 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:45:31,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:45:31,826 INFO L85 PathProgramCache]: Analyzing trace with hash 789489986, now seen corresponding path program 1 times [2023-11-21 19:45:31,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:45:31,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103683024] [2023-11-21 19:45:31,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:31,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:45:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:45:31,933 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 19:45:31,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:45:31,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103683024] [2023-11-21 19:45:31,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103683024] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:45:31,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:45:31,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:45:31,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303393468] [2023-11-21 19:45:31,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:45:31,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:45:31,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:45:31,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:45:31,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:45:31,936 INFO L87 Difference]: Start difference. First operand 409 states and 531 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 19:45:32,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:45:32,051 INFO L93 Difference]: Finished difference Result 674 states and 867 transitions. [2023-11-21 19:45:32,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:45:32,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2023-11-21 19:45:32,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:45:32,053 INFO L225 Difference]: With dead ends: 674 [2023-11-21 19:45:32,053 INFO L226 Difference]: Without dead ends: 128 [2023-11-21 19:45:32,055 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 19:45:32,064 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 256 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:45:32,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 225 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:45:32,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-21 19:45:32,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2023-11-21 19:45:32,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 101 states have (on average 1.4455445544554455) internal successors, (146), 102 states have internal predecessors, (146), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-21 19:45:32,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 186 transitions. [2023-11-21 19:45:32,126 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 186 transitions. Word has length 47 [2023-11-21 19:45:32,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:45:32,128 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 186 transitions. [2023-11-21 19:45:32,128 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), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 19:45:32,129 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 186 transitions. [2023-11-21 19:45:32,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-21 19:45:32,133 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:45:32,133 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, 1, 1, 1] [2023-11-21 19:45:32,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 19:45:32,134 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:45:32,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:45:32,135 INFO L85 PathProgramCache]: Analyzing trace with hash -225646004, now seen corresponding path program 1 times [2023-11-21 19:45:32,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:45:32,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605977109] [2023-11-21 19:45:32,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:32,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:45:32,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:45:32,302 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 19:45:32,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:45:32,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605977109] [2023-11-21 19:45:32,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605977109] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:45:32,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:45:32,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 19:45:32,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794157108] [2023-11-21 19:45:32,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:45:32,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:45:32,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:45:32,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:45:32,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:45:32,306 INFO L87 Difference]: Start difference. First operand 128 states and 186 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 19:45:32,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:45:32,861 INFO L93 Difference]: Finished difference Result 711 states and 1098 transitions. [2023-11-21 19:45:32,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:45:32,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 49 [2023-11-21 19:45:32,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:45:32,870 INFO L225 Difference]: With dead ends: 711 [2023-11-21 19:45:32,870 INFO L226 Difference]: Without dead ends: 589 [2023-11-21 19:45:32,871 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 19:45:32,877 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 800 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 19:45:32,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [802 Valid, 753 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 19:45:32,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2023-11-21 19:45:32,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 578. [2023-11-21 19:45:32,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 466 states have (on average 1.44206008583691) internal successors, (672), 470 states have internal predecessors, (672), 81 states have call successors, (81), 30 states have call predecessors, (81), 30 states have return successors, (119), 78 states have call predecessors, (119), 81 states have call successors, (119) [2023-11-21 19:45:32,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 872 transitions. [2023-11-21 19:45:32,969 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 872 transitions. Word has length 49 [2023-11-21 19:45:32,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:45:32,973 INFO L495 AbstractCegarLoop]: Abstraction has 578 states and 872 transitions. [2023-11-21 19:45:32,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 19:45:32,973 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 872 transitions. [2023-11-21 19:45:32,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-21 19:45:32,977 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:45:32,978 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, 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 19:45:32,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 19:45:32,979 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:45:32,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:45:32,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1395194213, now seen corresponding path program 1 times [2023-11-21 19:45:32,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:45:32,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953618253] [2023-11-21 19:45:32,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:32,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:45:33,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:45:33,181 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 19:45:33,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:45:33,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953618253] [2023-11-21 19:45:33,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953618253] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:45:33,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045494818] [2023-11-21 19:45:33,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:33,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:45:33,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:45:33,194 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:45:33,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:45:33,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:45:33,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:45:33,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:45:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-21 19:45:33,505 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:45:33,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045494818] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:45:33,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:45:33,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-21 19:45:33,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688714144] [2023-11-21 19:45:33,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:45:33,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:45:33,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:45:33,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:45:33,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:45:33,509 INFO L87 Difference]: Start difference. First operand 578 states and 872 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 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 19:45:33,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:45:33,673 INFO L93 Difference]: Finished difference Result 1706 states and 2644 transitions. [2023-11-21 19:45:33,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:45:33,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 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 95 [2023-11-21 19:45:33,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:45:33,682 INFO L225 Difference]: With dead ends: 1706 [2023-11-21 19:45:33,682 INFO L226 Difference]: Without dead ends: 1134 [2023-11-21 19:45:33,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 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 19:45:33,687 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 158 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:45:33,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 300 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:45:33,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2023-11-21 19:45:33,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1127. [2023-11-21 19:45:33,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 913 states have (on average 1.434830230010953) internal successors, (1310), 920 states have internal predecessors, (1310), 153 states have call successors, (153), 60 states have call predecessors, (153), 60 states have return successors, (225), 147 states have call predecessors, (225), 153 states have call successors, (225) [2023-11-21 19:45:33,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 1688 transitions. [2023-11-21 19:45:33,794 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 1688 transitions. Word has length 95 [2023-11-21 19:45:33,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:45:33,795 INFO L495 AbstractCegarLoop]: Abstraction has 1127 states and 1688 transitions. [2023-11-21 19:45:33,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 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 19:45:33,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 1688 transitions. [2023-11-21 19:45:33,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-21 19:45:33,828 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:45:33,828 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, 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 19:45:33,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 19:45:34,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:45:34,029 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:45:34,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:45:34,029 INFO L85 PathProgramCache]: Analyzing trace with hash -228522875, now seen corresponding path program 1 times [2023-11-21 19:45:34,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:45:34,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208044817] [2023-11-21 19:45:34,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:34,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:45:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:45:34,160 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 19:45:34,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:45:34,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208044817] [2023-11-21 19:45:34,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208044817] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:45:34,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699798516] [2023-11-21 19:45:34,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:34,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:45:34,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:45:34,163 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:45:34,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 19:45:34,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:45:34,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:45:34,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:45:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 19:45:34,427 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:45:34,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699798516] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:45:34,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:45:34,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-21 19:45:34,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168127682] [2023-11-21 19:45:34,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:45:34,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:45:34,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:45:34,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:45:34,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:45:34,432 INFO L87 Difference]: Start difference. First operand 1127 states and 1688 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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 19:45:34,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:45:34,661 INFO L93 Difference]: Finished difference Result 3338 states and 5130 transitions. [2023-11-21 19:45:34,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:45:34,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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 95 [2023-11-21 19:45:34,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:45:34,709 INFO L225 Difference]: With dead ends: 3338 [2023-11-21 19:45:34,710 INFO L226 Difference]: Without dead ends: 2217 [2023-11-21 19:45:34,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 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 19:45:34,717 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 149 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:45:34,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 295 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:45:34,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2217 states. [2023-11-21 19:45:34,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2217 to 2205. [2023-11-21 19:45:34,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 1792 states have (on average 1.4263392857142858) internal successors, (2556), 1805 states have internal predecessors, (2556), 292 states have call successors, (292), 120 states have call predecessors, (292), 120 states have return successors, (428), 280 states have call predecessors, (428), 292 states have call successors, (428) [2023-11-21 19:45:34,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 3276 transitions. [2023-11-21 19:45:34,895 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 3276 transitions. Word has length 95 [2023-11-21 19:45:34,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:45:34,895 INFO L495 AbstractCegarLoop]: Abstraction has 2205 states and 3276 transitions. [2023-11-21 19:45:34,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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 19:45:34,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 3276 transitions. [2023-11-21 19:45:34,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-21 19:45:34,905 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:45:34,906 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, 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 19:45:34,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 19:45:35,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:45:35,127 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:45:35,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:45:35,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1215952229, now seen corresponding path program 1 times [2023-11-21 19:45:35,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:45:35,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819012162] [2023-11-21 19:45:35,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:35,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:45:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:45:35,239 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 19:45:35,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:45:35,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819012162] [2023-11-21 19:45:35,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819012162] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:45:35,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623723394] [2023-11-21 19:45:35,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:35,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:45:35,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:45:35,242 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:45:35,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 19:45:35,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:45:35,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:45:35,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:45:35,523 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-21 19:45:35,523 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:45:35,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623723394] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:45:35,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:45:35,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-21 19:45:35,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991380652] [2023-11-21 19:45:35,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:45:35,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:45:35,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:45:35,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:45:35,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:45:35,526 INFO L87 Difference]: Start difference. First operand 2205 states and 3276 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 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 19:45:35,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:45:35,899 INFO L93 Difference]: Finished difference Result 6542 states and 9961 transitions. [2023-11-21 19:45:35,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:45:35,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 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 95 [2023-11-21 19:45:35,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:45:35,932 INFO L225 Difference]: With dead ends: 6542 [2023-11-21 19:45:35,932 INFO L226 Difference]: Without dead ends: 4343 [2023-11-21 19:45:35,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 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 19:45:35,945 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 155 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:45:35,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 295 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:45:35,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4343 states. [2023-11-21 19:45:36,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4343 to 4321. [2023-11-21 19:45:36,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4321 states, 3520 states have (on average 1.4170454545454545) internal successors, (4988), 3545 states have internal predecessors, (4988), 560 states have call successors, (560), 240 states have call predecessors, (560), 240 states have return successors, (816), 536 states have call predecessors, (816), 560 states have call successors, (816) [2023-11-21 19:45:36,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4321 states to 4321 states and 6364 transitions. [2023-11-21 19:45:36,308 INFO L78 Accepts]: Start accepts. Automaton has 4321 states and 6364 transitions. Word has length 95 [2023-11-21 19:45:36,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:45:36,309 INFO L495 AbstractCegarLoop]: Abstraction has 4321 states and 6364 transitions. [2023-11-21 19:45:36,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 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 19:45:36,309 INFO L276 IsEmpty]: Start isEmpty. Operand 4321 states and 6364 transitions. [2023-11-21 19:45:36,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-21 19:45:36,317 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:45:36,317 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, 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 19:45:36,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 19:45:36,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:45:36,530 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:45:36,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:45:36,530 INFO L85 PathProgramCache]: Analyzing trace with hash -846021051, now seen corresponding path program 1 times [2023-11-21 19:45:36,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:45:36,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000026177] [2023-11-21 19:45:36,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:36,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:45:36,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:45:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-21 19:45:36,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:45:36,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000026177] [2023-11-21 19:45:36,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000026177] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:45:36,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:45:36,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:45:36,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775028037] [2023-11-21 19:45:36,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:45:36,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:45:36,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:45:36,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:45:36,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:45:36,653 INFO L87 Difference]: Start difference. First operand 4321 states and 6364 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 19:45:37,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:45:37,067 INFO L93 Difference]: Finished difference Result 8819 states and 13257 transitions. [2023-11-21 19:45:37,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:45:37,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 95 [2023-11-21 19:45:37,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:45:37,108 INFO L225 Difference]: With dead ends: 8819 [2023-11-21 19:45:37,109 INFO L226 Difference]: Without dead ends: 5361 [2023-11-21 19:45:37,122 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 19:45:37,123 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 80 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:45:37,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 396 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:45:37,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5361 states. [2023-11-21 19:45:37,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5361 to 4993. [2023-11-21 19:45:37,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4993 states, 4160 states have (on average 1.4432692307692307) internal successors, (6004), 4185 states have internal predecessors, (6004), 576 states have call successors, (576), 256 states have call predecessors, (576), 256 states have return successors, (832), 552 states have call predecessors, (832), 576 states have call successors, (832) [2023-11-21 19:45:37,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4993 states to 4993 states and 7412 transitions. [2023-11-21 19:45:37,613 INFO L78 Accepts]: Start accepts. Automaton has 4993 states and 7412 transitions. Word has length 95 [2023-11-21 19:45:37,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:45:37,614 INFO L495 AbstractCegarLoop]: Abstraction has 4993 states and 7412 transitions. [2023-11-21 19:45:37,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 19:45:37,614 INFO L276 IsEmpty]: Start isEmpty. Operand 4993 states and 7412 transitions. [2023-11-21 19:45:37,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-21 19:45:37,631 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:45:37,631 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, 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] [2023-11-21 19:45:37,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 19:45:37,632 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:45:37,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:45:37,632 INFO L85 PathProgramCache]: Analyzing trace with hash 845422210, now seen corresponding path program 1 times [2023-11-21 19:45:37,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:45:37,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269197823] [2023-11-21 19:45:37,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:37,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:45:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:45:37,767 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-21 19:45:37,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:45:37,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269197823] [2023-11-21 19:45:37,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269197823] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:45:37,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:45:37,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:45:37,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245970027] [2023-11-21 19:45:37,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:45:37,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:45:37,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:45:37,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:45:37,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:45:37,770 INFO L87 Difference]: Start difference. First operand 4993 states and 7412 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 19:45:38,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:45:38,430 INFO L93 Difference]: Finished difference Result 14790 states and 22373 transitions. [2023-11-21 19:45:38,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:45:38,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 128 [2023-11-21 19:45:38,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:45:38,519 INFO L225 Difference]: With dead ends: 14790 [2023-11-21 19:45:38,520 INFO L226 Difference]: Without dead ends: 9803 [2023-11-21 19:45:38,540 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 19:45:38,541 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 150 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:45:38,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 297 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:45:38,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9803 states. [2023-11-21 19:45:39,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9803 to 9745. [2023-11-21 19:45:39,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9745 states, 8124 states have (on average 1.430329886755293) internal successors, (11620), 8173 states have internal predecessors, (11620), 1108 states have call successors, (1108), 512 states have call predecessors, (1108), 512 states have return successors, (1588), 1060 states have call predecessors, (1588), 1108 states have call successors, (1588) [2023-11-21 19:45:39,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9745 states to 9745 states and 14316 transitions. [2023-11-21 19:45:39,393 INFO L78 Accepts]: Start accepts. Automaton has 9745 states and 14316 transitions. Word has length 128 [2023-11-21 19:45:39,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:45:39,394 INFO L495 AbstractCegarLoop]: Abstraction has 9745 states and 14316 transitions. [2023-11-21 19:45:39,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 19:45:39,396 INFO L276 IsEmpty]: Start isEmpty. Operand 9745 states and 14316 transitions. [2023-11-21 19:45:39,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-21 19:45:39,433 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:45:39,434 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, 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] [2023-11-21 19:45:39,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 19:45:39,434 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:45:39,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:45:39,435 INFO L85 PathProgramCache]: Analyzing trace with hash 328687934, now seen corresponding path program 1 times [2023-11-21 19:45:39,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:45:39,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474836070] [2023-11-21 19:45:39,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:39,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:45:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:45:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-21 19:45:39,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:45:39,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474836070] [2023-11-21 19:45:39,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474836070] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:45:39,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:45:39,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:45:39,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456136728] [2023-11-21 19:45:39,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:45:39,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:45:39,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:45:39,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:45:39,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:45:39,552 INFO L87 Difference]: Start difference. First operand 9745 states and 14316 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 19:45:40,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:45:40,911 INFO L93 Difference]: Finished difference Result 28870 states and 43169 transitions. [2023-11-21 19:45:40,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:45:40,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 128 [2023-11-21 19:45:40,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:45:40,992 INFO L225 Difference]: With dead ends: 28870 [2023-11-21 19:45:40,992 INFO L226 Difference]: Without dead ends: 19131 [2023-11-21 19:45:41,034 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 19:45:41,035 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 153 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:45:41,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 311 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:45:41,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19131 states. [2023-11-21 19:45:42,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19131 to 19017. [2023-11-21 19:45:42,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19017 states, 15860 states have (on average 1.4166456494325346) internal successors, (22468), 15957 states have internal predecessors, (22468), 2132 states have call successors, (2132), 1024 states have call predecessors, (2132), 1024 states have return successors, (3028), 2036 states have call predecessors, (3028), 2132 states have call successors, (3028) [2023-11-21 19:45:42,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19017 states to 19017 states and 27628 transitions. [2023-11-21 19:45:42,543 INFO L78 Accepts]: Start accepts. Automaton has 19017 states and 27628 transitions. Word has length 128 [2023-11-21 19:45:42,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:45:42,544 INFO L495 AbstractCegarLoop]: Abstraction has 19017 states and 27628 transitions. [2023-11-21 19:45:42,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 19:45:42,544 INFO L276 IsEmpty]: Start isEmpty. Operand 19017 states and 27628 transitions. [2023-11-21 19:45:42,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-21 19:45:42,634 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:45:42,634 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:45:42,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 19:45:42,635 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:45:42,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:45:42,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1284980598, now seen corresponding path program 1 times [2023-11-21 19:45:42,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:45:42,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384253722] [2023-11-21 19:45:42,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:42,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:45:42,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:45:43,453 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-21 19:45:43,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:45:43,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384253722] [2023-11-21 19:45:43,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384253722] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:45:43,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120052410] [2023-11-21 19:45:43,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:43,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:45:43,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:45:43,456 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:45:43,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f0f36-4b48-40fd-8542-e1fed9e3aa4d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 19:45:43,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:45:43,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-21 19:45:43,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:45:44,089 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 66 proven. 29 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-21 19:45:44,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:45:44,642 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 53 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-21 19:45:44,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120052410] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:45:44,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1862283269] [2023-11-21 19:45:44,667 INFO L159 IcfgInterpreter]: Started Sifa with 78 locations of interest [2023-11-21 19:45:44,667 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:45:44,671 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:45:44,676 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:45:44,677 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:46:05,214 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 1 for LOIs [2023-11-21 19:46:05,223 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 1 for LOIs [2023-11-21 19:46:05,243 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 1 for LOIs [2023-11-21 19:46:05,244 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 130 for LOIs [2023-11-21 19:46:06,536 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 1 for LOIs [2023-11-21 19:46:06,698 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 190 for LOIs [2023-11-21 19:46:06,859 INFO L180 IcfgInterpreter]: Interpretation finished