./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.12.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.12.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ --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 2c24bc45cf56e090de9596945e0f5e2694e330a653ff2d4e505361654a060374 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:11:43,641 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:11:43,733 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:11:43,741 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:11:43,742 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:11:43,779 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:11:43,780 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:11:43,781 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:11:43,782 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:11:43,782 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:11:43,783 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:11:43,784 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:11:43,784 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:11:43,785 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:11:43,786 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:11:43,786 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:11:43,787 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:11:43,788 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:11:43,788 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:11:43,789 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:11:43,790 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:11:43,791 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:11:43,792 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:11:43,792 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:11:43,793 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:11:43,794 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:11:43,794 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:11:43,795 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:11:43,795 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:11:43,796 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:11:43,796 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:11:43,797 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:11:43,797 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:11:43,798 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:11:43,799 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:11:43,799 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:11:43,800 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:11:43,800 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:11:43,801 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:11:43,801 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:11:43,801 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:11:43,802 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:11:43,802 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:11:43,803 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:11:43,803 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:11:43,803 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_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c24bc45cf56e090de9596945e0f5e2694e330a653ff2d4e505361654a060374 [2023-11-19 05:11:44,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:11:44,152 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:11:44,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:11:44,157 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:11:44,158 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:11:44,161 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.12.cil-2.c [2023-11-19 05:11:47,846 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:11:48,843 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:11:48,844 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/sv-benchmarks/c/combinations/Problem05_label45+token_ring.12.cil-2.c [2023-11-19 05:11:48,916 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/data/df25f1e3c/0f088eadd26f4e41a911e61f18b7fb0d/FLAG635f420af [2023-11-19 05:11:48,935 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/data/df25f1e3c/0f088eadd26f4e41a911e61f18b7fb0d [2023-11-19 05:11:48,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:11:48,940 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:11:48,941 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:11:48,942 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:11:48,950 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:11:48,951 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:11:48" (1/1) ... [2023-11-19 05:11:48,953 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a490342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:48, skipping insertion in model container [2023-11-19 05:11:48,953 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:11:48" (1/1) ... [2023-11-19 05:11:49,275 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:11:52,488 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_95f7979a-5514-40ef-90df-cbe989517e68/sv-benchmarks/c/combinations/Problem05_label45+token_ring.12.cil-2.c[380323,380336] [2023-11-19 05:11:52,524 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_95f7979a-5514-40ef-90df-cbe989517e68/sv-benchmarks/c/combinations/Problem05_label45+token_ring.12.cil-2.c[383339,383352] [2023-11-19 05:11:52,928 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:11:52,944 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:11:54,423 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_95f7979a-5514-40ef-90df-cbe989517e68/sv-benchmarks/c/combinations/Problem05_label45+token_ring.12.cil-2.c[380323,380336] [2023-11-19 05:11:54,432 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_95f7979a-5514-40ef-90df-cbe989517e68/sv-benchmarks/c/combinations/Problem05_label45+token_ring.12.cil-2.c[383339,383352] [2023-11-19 05:11:54,463 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:11:54,565 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:11:54,567 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:54 WrapperNode [2023-11-19 05:11:54,567 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:11:54,569 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:11:54,569 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:11:54,569 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:11:54,578 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:54" (1/1) ... [2023-11-19 05:11:54,712 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:54" (1/1) ... [2023-11-19 05:11:55,372 INFO L138 Inliner]: procedures = 68, calls = 77, calls flagged for inlining = 46, calls inlined = 46, statements flattened = 13228 [2023-11-19 05:11:55,373 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:11:55,374 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:11:55,374 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:11:55,374 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:11:55,386 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:54" (1/1) ... [2023-11-19 05:11:55,387 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:54" (1/1) ... [2023-11-19 05:11:55,481 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:54" (1/1) ... [2023-11-19 05:11:55,481 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:54" (1/1) ... [2023-11-19 05:11:55,869 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:54" (1/1) ... [2023-11-19 05:11:55,929 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:54" (1/1) ... [2023-11-19 05:11:55,955 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:54" (1/1) ... [2023-11-19 05:11:55,986 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:54" (1/1) ... [2023-11-19 05:11:56,054 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:11:56,056 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:11:56,057 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:11:56,057 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:11:56,058 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:54" (1/1) ... [2023-11-19 05:11:56,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:11:56,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:11:56,105 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:11:56,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:11:56,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:11:56,159 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-19 05:11:56,159 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-19 05:11:56,162 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-19 05:11:56,162 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-19 05:11:56,163 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-19 05:11:56,163 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-19 05:11:56,163 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-19 05:11:56,163 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-19 05:11:56,164 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-19 05:11:56,164 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-19 05:11:56,164 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-19 05:11:56,164 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-19 05:11:56,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:11:56,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:11:56,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:11:56,383 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:11:56,386 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:12:07,835 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:12:11,583 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:12:11,583 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-19 05:12:11,614 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:12:11 BoogieIcfgContainer [2023-11-19 05:12:11,615 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:12:11,618 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:12:11,618 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:12:11,622 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:12:11,622 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:11:48" (1/3) ... [2023-11-19 05:12:11,623 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9cdff13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:12:11, skipping insertion in model container [2023-11-19 05:12:11,624 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:54" (2/3) ... [2023-11-19 05:12:11,624 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9cdff13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:12:11, skipping insertion in model container [2023-11-19 05:12:11,624 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:12:11" (3/3) ... [2023-11-19 05:12:11,626 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.12.cil-2.c [2023-11-19 05:12:11,652 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:12:11,652 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 05:12:11,786 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:12:11,796 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;@3bb23b3e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:12:11,796 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 05:12:11,814 INFO L276 IsEmpty]: Start isEmpty. Operand has 1844 states, 1809 states have (on average 1.94914317302377) internal successors, (3526), 1812 states have internal predecessors, (3526), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-19 05:12:11,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-19 05:12:11,840 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:11,841 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:11,842 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:11,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:11,851 INFO L85 PathProgramCache]: Analyzing trace with hash -880329509, now seen corresponding path program 1 times [2023-11-19 05:12:11,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:11,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609958527] [2023-11-19 05:12:11,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:11,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:12,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:12,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:12:12,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:12,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609958527] [2023-11-19 05:12:12,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609958527] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:12,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:12,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:12:12,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668074799] [2023-11-19 05:12:12,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:12,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:12:12,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:12,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:12:12,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:12:12,763 INFO L87 Difference]: Start difference. First operand has 1844 states, 1809 states have (on average 1.94914317302377) internal successors, (3526), 1812 states have internal predecessors, (3526), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2023-11-19 05:12:14,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:14,170 INFO L93 Difference]: Finished difference Result 3872 states and 7466 transitions. [2023-11-19 05:12:14,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:12:14,173 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 67 [2023-11-19 05:12:14,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:14,213 INFO L225 Difference]: With dead ends: 3872 [2023-11-19 05:12:14,214 INFO L226 Difference]: Without dead ends: 2027 [2023-11-19 05:12:14,228 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 [2023-11-19 05:12:14,234 INFO L413 NwaCegarLoop]: 3537 mSDtfsCounter, 3805 mSDsluCounter, 3439 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3805 SdHoareTripleChecker+Valid, 6976 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:14,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3805 Valid, 6976 Invalid, 740 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 05:12:14,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2023-11-19 05:12:14,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 2026. [2023-11-19 05:12:14,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2026 states, 1964 states have (on average 1.9073319755600815) internal successors, (3746), 1967 states have internal predecessors, (3746), 48 states have call successors, (48), 12 states have call predecessors, (48), 12 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2023-11-19 05:12:14,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 3842 transitions. [2023-11-19 05:12:14,465 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 3842 transitions. Word has length 67 [2023-11-19 05:12:14,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:14,466 INFO L495 AbstractCegarLoop]: Abstraction has 2026 states and 3842 transitions. [2023-11-19 05:12:14,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2023-11-19 05:12:14,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 3842 transitions. [2023-11-19 05:12:14,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-19 05:12:14,480 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:14,481 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:14,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:12:14,482 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:14,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:14,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1229070487, now seen corresponding path program 1 times [2023-11-19 05:12:14,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:14,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540543991] [2023-11-19 05:12:14,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:14,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:12:15,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:15,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540543991] [2023-11-19 05:12:15,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540543991] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:12:15,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513693407] [2023-11-19 05:12:15,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:15,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:15,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:15,069 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:12:15,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:12:15,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:15,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:12:15,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:12:15,580 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-19 05:12:15,580 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:12:15,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513693407] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:15,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:12:15,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:12:15,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730427979] [2023-11-19 05:12:15,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:15,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:15,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:15,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:15,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:15,586 INFO L87 Difference]: Start difference. First operand 2026 states and 3842 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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) [2023-11-19 05:12:16,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:16,296 INFO L93 Difference]: Finished difference Result 2779 states and 4993 transitions. [2023-11-19 05:12:16,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:16,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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 137 [2023-11-19 05:12:16,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:16,321 INFO L225 Difference]: With dead ends: 2779 [2023-11-19 05:12:16,321 INFO L226 Difference]: Without dead ends: 2399 [2023-11-19 05:12:16,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:16,326 INFO L413 NwaCegarLoop]: 3355 mSDtfsCounter, 3520 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3520 SdHoareTripleChecker+Valid, 3593 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:16,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3520 Valid, 3593 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:12:16,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2023-11-19 05:12:16,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2395. [2023-11-19 05:12:16,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2279 states have (on average 1.8468626590609916) internal successors, (4209), 2283 states have internal predecessors, (4209), 90 states have call successors, (90), 24 states have call predecessors, (90), 24 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2023-11-19 05:12:16,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 4389 transitions. [2023-11-19 05:12:16,485 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 4389 transitions. Word has length 137 [2023-11-19 05:12:16,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:16,486 INFO L495 AbstractCegarLoop]: Abstraction has 2395 states and 4389 transitions. [2023-11-19 05:12:16,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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) [2023-11-19 05:12:16,487 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 4389 transitions. [2023-11-19 05:12:16,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-19 05:12:16,496 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:16,497 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:16,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:12:16,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:16,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:16,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:16,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1200184247, now seen corresponding path program 1 times [2023-11-19 05:12:16,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:16,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769310178] [2023-11-19 05:12:16,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:16,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:17,248 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:12:17,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:17,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769310178] [2023-11-19 05:12:17,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769310178] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:12:17,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329271974] [2023-11-19 05:12:17,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:17,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:17,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:17,252 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:12:17,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:12:17,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:17,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:12:17,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:12:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-19 05:12:17,666 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:12:17,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329271974] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:17,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:12:17,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:12:17,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720422685] [2023-11-19 05:12:17,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:17,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:17,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:17,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:17,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:17,673 INFO L87 Difference]: Start difference. First operand 2395 states and 4389 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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) [2023-11-19 05:12:18,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:18,379 INFO L93 Difference]: Finished difference Result 3880 states and 6652 transitions. [2023-11-19 05:12:18,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:18,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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 137 [2023-11-19 05:12:18,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:18,409 INFO L225 Difference]: With dead ends: 3880 [2023-11-19 05:12:18,409 INFO L226 Difference]: Without dead ends: 3131 [2023-11-19 05:12:18,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:18,421 INFO L413 NwaCegarLoop]: 3335 mSDtfsCounter, 3532 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3532 SdHoareTripleChecker+Valid, 3573 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:18,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3532 Valid, 3573 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:12:18,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2023-11-19 05:12:18,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3125. [2023-11-19 05:12:18,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3125 states, 2903 states have (on average 1.764726145366862) internal successors, (5123), 2909 states have internal predecessors, (5123), 172 states have call successors, (172), 48 states have call predecessors, (172), 48 states have return successors, (172), 168 states have call predecessors, (172), 172 states have call successors, (172) [2023-11-19 05:12:18,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3125 states to 3125 states and 5467 transitions. [2023-11-19 05:12:18,580 INFO L78 Accepts]: Start accepts. Automaton has 3125 states and 5467 transitions. Word has length 137 [2023-11-19 05:12:18,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:18,580 INFO L495 AbstractCegarLoop]: Abstraction has 3125 states and 5467 transitions. [2023-11-19 05:12:18,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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) [2023-11-19 05:12:18,581 INFO L276 IsEmpty]: Start isEmpty. Operand 3125 states and 5467 transitions. [2023-11-19 05:12:18,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-19 05:12:18,588 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:18,588 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:18,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:12:18,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:18,811 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:18,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:18,812 INFO L85 PathProgramCache]: Analyzing trace with hash -372303575, now seen corresponding path program 1 times [2023-11-19 05:12:18,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:18,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375875140] [2023-11-19 05:12:18,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:18,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:19,004 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:12:19,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:19,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375875140] [2023-11-19 05:12:19,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375875140] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:12:19,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649268015] [2023-11-19 05:12:19,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:19,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:19,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:19,014 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:12:19,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:12:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:19,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:12:19,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:12:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-19 05:12:19,335 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:12:19,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649268015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:19,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:12:19,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:12:19,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980221666] [2023-11-19 05:12:19,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:19,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:19,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:19,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:19,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:19,338 INFO L87 Difference]: Start difference. First operand 3125 states and 5467 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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) [2023-11-19 05:12:19,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:19,960 INFO L93 Difference]: Finished difference Result 6058 states and 9920 transitions. [2023-11-19 05:12:19,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:19,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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 137 [2023-11-19 05:12:19,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:19,990 INFO L225 Difference]: With dead ends: 6058 [2023-11-19 05:12:19,990 INFO L226 Difference]: Without dead ends: 4579 [2023-11-19 05:12:19,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:19,999 INFO L413 NwaCegarLoop]: 3351 mSDtfsCounter, 3538 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3538 SdHoareTripleChecker+Valid, 3589 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:19,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3538 Valid, 3589 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:12:20,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4579 states. [2023-11-19 05:12:20,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4579 to 4569. [2023-11-19 05:12:20,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4569 states, 4139 states have (on average 1.673592655230732) internal successors, (6927), 4149 states have internal predecessors, (6927), 332 states have call successors, (332), 96 states have call predecessors, (332), 96 states have return successors, (332), 324 states have call predecessors, (332), 332 states have call successors, (332) [2023-11-19 05:12:20,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4569 states to 4569 states and 7591 transitions. [2023-11-19 05:12:20,222 INFO L78 Accepts]: Start accepts. Automaton has 4569 states and 7591 transitions. Word has length 137 [2023-11-19 05:12:20,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:20,223 INFO L495 AbstractCegarLoop]: Abstraction has 4569 states and 7591 transitions. [2023-11-19 05:12:20,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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) [2023-11-19 05:12:20,227 INFO L276 IsEmpty]: Start isEmpty. Operand 4569 states and 7591 transitions. [2023-11-19 05:12:20,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-19 05:12:20,237 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:20,238 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:20,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:12:20,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:20,461 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:20,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:20,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1433691657, now seen corresponding path program 1 times [2023-11-19 05:12:20,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:20,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831203967] [2023-11-19 05:12:20,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:20,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:12:20,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:20,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831203967] [2023-11-19 05:12:20,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831203967] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:12:20,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461254908] [2023-11-19 05:12:20,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:20,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:20,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:20,656 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:12:20,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:12:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:20,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 1023 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:12:20,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:12:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-19 05:12:20,993 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:12:20,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461254908] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:20,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:12:20,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:12:20,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274442574] [2023-11-19 05:12:21,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:21,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:21,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:21,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:21,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:21,002 INFO L87 Difference]: Start difference. First operand 4569 states and 7591 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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) [2023-11-19 05:12:21,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:21,790 INFO L93 Difference]: Finished difference Result 10366 states and 16356 transitions. [2023-11-19 05:12:21,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:21,791 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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 137 [2023-11-19 05:12:21,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:21,841 INFO L225 Difference]: With dead ends: 10366 [2023-11-19 05:12:21,842 INFO L226 Difference]: Without dead ends: 7443 [2023-11-19 05:12:21,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:21,855 INFO L413 NwaCegarLoop]: 3302 mSDtfsCounter, 3526 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3526 SdHoareTripleChecker+Valid, 3540 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:21,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3526 Valid, 3540 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:12:21,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7443 states. [2023-11-19 05:12:22,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7443 to 7425. [2023-11-19 05:12:22,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7425 states, 6587 states have (on average 1.5920752998330043) internal successors, (10487), 6605 states have internal predecessors, (10487), 644 states have call successors, (644), 192 states have call predecessors, (644), 192 states have return successors, (644), 628 states have call predecessors, (644), 644 states have call successors, (644) [2023-11-19 05:12:22,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7425 states to 7425 states and 11775 transitions. [2023-11-19 05:12:22,289 INFO L78 Accepts]: Start accepts. Automaton has 7425 states and 11775 transitions. Word has length 137 [2023-11-19 05:12:22,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:22,289 INFO L495 AbstractCegarLoop]: Abstraction has 7425 states and 11775 transitions. [2023-11-19 05:12:22,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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) [2023-11-19 05:12:22,291 INFO L276 IsEmpty]: Start isEmpty. Operand 7425 states and 11775 transitions. [2023-11-19 05:12:22,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-19 05:12:22,308 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:22,309 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:22,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:12:22,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:22,529 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:22,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:22,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1140981015, now seen corresponding path program 1 times [2023-11-19 05:12:22,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:22,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213520946] [2023-11-19 05:12:22,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:22,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:22,838 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:12:22,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:22,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213520946] [2023-11-19 05:12:22,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213520946] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:12:22,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285183551] [2023-11-19 05:12:22,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:22,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:22,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:22,841 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:12:22,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:12:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:23,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:12:23,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:12:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-19 05:12:23,149 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:12:23,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285183551] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:23,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:12:23,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:12:23,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031385165] [2023-11-19 05:12:23,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:23,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:23,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:23,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:23,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:23,153 INFO L87 Difference]: Start difference. First operand 7425 states and 11775 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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) [2023-11-19 05:12:24,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:24,203 INFO L93 Difference]: Finished difference Result 18886 states and 29028 transitions. [2023-11-19 05:12:24,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:24,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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 137 [2023-11-19 05:12:24,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:24,319 INFO L225 Difference]: With dead ends: 18886 [2023-11-19 05:12:24,320 INFO L226 Difference]: Without dead ends: 13107 [2023-11-19 05:12:24,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:24,360 INFO L413 NwaCegarLoop]: 3347 mSDtfsCounter, 3541 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3541 SdHoareTripleChecker+Valid, 3585 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:24,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3541 Valid, 3585 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:12:24,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13107 states. [2023-11-19 05:12:25,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13107 to 13073. [2023-11-19 05:12:25,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13073 states, 11435 states have (on average 1.5313511149978136) internal successors, (17511), 11469 states have internal predecessors, (17511), 1252 states have call successors, (1252), 384 states have call predecessors, (1252), 384 states have return successors, (1252), 1220 states have call predecessors, (1252), 1252 states have call successors, (1252) [2023-11-19 05:12:25,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13073 states to 13073 states and 20015 transitions. [2023-11-19 05:12:25,341 INFO L78 Accepts]: Start accepts. Automaton has 13073 states and 20015 transitions. Word has length 137 [2023-11-19 05:12:25,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:25,342 INFO L495 AbstractCegarLoop]: Abstraction has 13073 states and 20015 transitions. [2023-11-19 05:12:25,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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) [2023-11-19 05:12:25,343 INFO L276 IsEmpty]: Start isEmpty. Operand 13073 states and 20015 transitions. [2023-11-19 05:12:25,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-19 05:12:25,378 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:25,378 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:25,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:12:25,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 05:12:25,609 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:25,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:25,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1792341495, now seen corresponding path program 1 times [2023-11-19 05:12:25,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:25,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376705218] [2023-11-19 05:12:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:25,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:12:25,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:25,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376705218] [2023-11-19 05:12:25,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376705218] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:12:25,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901473614] [2023-11-19 05:12:25,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:25,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:25,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:25,848 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:12:25,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f7979a-5514-40ef-90df-cbe989517e68/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:12:26,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:26,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:12:26,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:12:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:12:26,261 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:12:26,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901473614] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:26,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:12:26,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:12:26,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731576612] [2023-11-19 05:12:26,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:26,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:26,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:26,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:26,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:26,265 INFO L87 Difference]: Start difference. First operand 13073 states and 20015 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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)