./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-1.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_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/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_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/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_1677cc3c-f7e7-41da-88eb-a4779432a247/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 257fbefed94a1e5b18da17b648f63b8a4a376ab6bd67ba2a090c30b5997c5667 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:58:09,997 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:58:10,084 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:58:10,089 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:58:10,090 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:58:10,113 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:58:10,113 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:58:10,114 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:58:10,115 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:58:10,115 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:58:10,116 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:58:10,116 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:58:10,117 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:58:10,117 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:58:10,118 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:58:10,124 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:58:10,125 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:58:10,126 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:58:10,126 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:58:10,127 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:58:10,128 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:58:10,128 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:58:10,130 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:58:10,130 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:58:10,130 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:58:10,131 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:58:10,131 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:58:10,132 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:58:10,132 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:58:10,132 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:58:10,134 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:58:10,134 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:58:10,134 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:58:10,134 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:58:10,135 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:58:10,135 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:58:10,135 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:58:10,136 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:58:10,136 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:58:10,136 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:58:10,136 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:58:10,137 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:58:10,137 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:58:10,138 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:58:10,138 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:58:10,138 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_1677cc3c-f7e7-41da-88eb-a4779432a247/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 257fbefed94a1e5b18da17b648f63b8a4a376ab6bd67ba2a090c30b5997c5667 [2023-11-19 04:58:10,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:58:10,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:58:10,458 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:58:10,459 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:58:10,460 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:58:10,461 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-1.c [2023-11-19 04:58:13,534 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:58:14,389 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:58:14,390 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-1.c [2023-11-19 04:58:14,445 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/data/799dae9bd/a0cb9023f0fe4ba6a726ece8c23b2dd7/FLAG185ba919f [2023-11-19 04:58:14,458 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/data/799dae9bd/a0cb9023f0fe4ba6a726ece8c23b2dd7 [2023-11-19 04:58:14,461 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:58:14,463 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:58:14,464 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:58:14,465 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:58:14,474 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:58:14,475 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:58:14" (1/1) ... [2023-11-19 04:58:14,476 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20e2ea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:14, skipping insertion in model container [2023-11-19 04:58:14,476 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:58:14" (1/1) ... [2023-11-19 04:58:14,848 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:58:17,254 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_1677cc3c-f7e7-41da-88eb-a4779432a247/sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-1.c[378560,378573] [2023-11-19 04:58:17,295 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_1677cc3c-f7e7-41da-88eb-a4779432a247/sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-1.c[383339,383352] [2023-11-19 04:58:17,731 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:58:17,748 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:58:19,063 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_1677cc3c-f7e7-41da-88eb-a4779432a247/sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-1.c[378560,378573] [2023-11-19 04:58:19,078 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-1.c[383339,383352] [2023-11-19 04:58:19,119 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:58:19,258 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:58:19,259 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:19 WrapperNode [2023-11-19 04:58:19,259 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:58:19,261 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:58:19,261 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:58:19,261 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:58:19,271 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:19" (1/1) ... [2023-11-19 04:58:19,383 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:19" (1/1) ... [2023-11-19 04:58:19,803 INFO L138 Inliner]: procedures = 66, calls = 75, calls flagged for inlining = 43, calls inlined = 43, statements flattened = 13174 [2023-11-19 04:58:19,804 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:58:19,805 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:58:19,805 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:58:19,805 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:58:19,816 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:19" (1/1) ... [2023-11-19 04:58:19,816 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:19" (1/1) ... [2023-11-19 04:58:19,877 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:19" (1/1) ... [2023-11-19 04:58:19,889 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:19" (1/1) ... [2023-11-19 04:58:20,305 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:19" (1/1) ... [2023-11-19 04:58:20,366 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:19" (1/1) ... [2023-11-19 04:58:20,389 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:19" (1/1) ... [2023-11-19 04:58:20,444 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:19" (1/1) ... [2023-11-19 04:58:20,572 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:58:20,573 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:58:20,584 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:58:20,585 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:58:20,586 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:19" (1/1) ... [2023-11-19 04:58:20,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:58:20,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:20,685 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:58:20,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:58:20,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:58:20,809 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-19 04:58:20,810 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-19 04:58:20,811 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-19 04:58:20,812 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-19 04:58:20,812 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-19 04:58:20,812 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-19 04:58:20,812 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-19 04:58:20,812 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-19 04:58:20,813 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-19 04:58:20,813 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-19 04:58:20,813 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-19 04:58:20,813 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-19 04:58:20,813 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-19 04:58:20,814 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-19 04:58:20,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:58:20,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:58:20,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:58:20,990 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:58:20,993 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:58:31,661 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:58:34,959 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:58:34,959 INFO L302 CfgBuilder]: Removed 15 assume(true) statements. [2023-11-19 04:58:34,992 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:58:34 BoogieIcfgContainer [2023-11-19 04:58:34,993 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:58:34,996 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:58:34,996 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:58:35,000 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:58:35,001 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:58:14" (1/3) ... [2023-11-19 04:58:35,003 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d1b4589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:58:35, skipping insertion in model container [2023-11-19 04:58:35,004 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:19" (2/3) ... [2023-11-19 04:58:35,004 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d1b4589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:58:35, skipping insertion in model container [2023-11-19 04:58:35,005 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:58:34" (3/3) ... [2023-11-19 04:58:35,006 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.11.cil-1.c [2023-11-19 04:58:35,033 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:58:35,033 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 04:58:35,182 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:58:35,194 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;@6a43a994, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:58:35,194 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 04:58:35,212 INFO L276 IsEmpty]: Start isEmpty. Operand has 1838 states, 1801 states have (on average 1.951693503609106) internal successors, (3515), 1806 states have internal predecessors, (3515), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2023-11-19 04:58:35,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-19 04:58:35,239 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:35,241 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] [2023-11-19 04:58:35,242 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:35,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:35,252 INFO L85 PathProgramCache]: Analyzing trace with hash 2117434665, now seen corresponding path program 1 times [2023-11-19 04:58:35,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:35,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222846492] [2023-11-19 04:58:35,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:35,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:36,112 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 04:58:36,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:36,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222846492] [2023-11-19 04:58:36,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222846492] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:36,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:58:36,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:58:36,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988760084] [2023-11-19 04:58:36,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:36,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:58:36,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:36,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:58:36,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:58:36,199 INFO L87 Difference]: Start difference. First operand has 1838 states, 1801 states have (on average 1.951693503609106) internal successors, (3515), 1806 states have internal predecessors, (3515), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 04:58:37,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:37,748 INFO L93 Difference]: Finished difference Result 3847 states and 7427 transitions. [2023-11-19 04:58:37,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:58:37,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 65 [2023-11-19 04:58:37,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:37,779 INFO L225 Difference]: With dead ends: 3847 [2023-11-19 04:58:37,779 INFO L226 Difference]: Without dead ends: 2008 [2023-11-19 04:58:37,792 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 04:58:37,798 INFO L413 NwaCegarLoop]: 3512 mSDtfsCounter, 3778 mSDsluCounter, 3416 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3778 SdHoareTripleChecker+Valid, 6928 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:37,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3778 Valid, 6928 Invalid, 728 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-19 04:58:37,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2023-11-19 04:58:37,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 2007. [2023-11-19 04:58:37,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2007 states, 1945 states have (on average 1.9115681233933162) internal successors, (3718), 1949 states have internal predecessors, (3718), 48 states have call successors, (48), 13 states have call predecessors, (48), 12 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-19 04:58:37,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2007 states to 2007 states and 3812 transitions. [2023-11-19 04:58:37,991 INFO L78 Accepts]: Start accepts. Automaton has 2007 states and 3812 transitions. Word has length 65 [2023-11-19 04:58:37,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:37,992 INFO L495 AbstractCegarLoop]: Abstraction has 2007 states and 3812 transitions. [2023-11-19 04:58:37,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 04:58:37,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2007 states and 3812 transitions. [2023-11-19 04:58:38,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-19 04:58:38,002 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:38,003 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:58:38,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:58:38,004 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:38,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:38,004 INFO L85 PathProgramCache]: Analyzing trace with hash -2116733240, now seen corresponding path program 1 times [2023-11-19 04:58:38,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:38,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650559159] [2023-11-19 04:58:38,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:38,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:38,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:38,379 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 04:58:38,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:38,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650559159] [2023-11-19 04:58:38,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650559159] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:38,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6170466] [2023-11-19 04:58:38,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:38,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:38,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:38,384 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:38,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:58:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:38,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:58:38,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 04:58:38,871 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:58:38,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6170466] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:38,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:58:38,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 04:58:38,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273950048] [2023-11-19 04:58:38,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:38,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:58:38,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:38,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:58:38,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:58:38,877 INFO L87 Difference]: Start difference. First operand 2007 states and 3812 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:58:39,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:39,706 INFO L93 Difference]: Finished difference Result 2722 states and 4901 transitions. [2023-11-19 04:58:39,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:58:39,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 131 [2023-11-19 04:58:39,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:39,733 INFO L225 Difference]: With dead ends: 2722 [2023-11-19 04:58:39,733 INFO L226 Difference]: Without dead ends: 2361 [2023-11-19 04:58:39,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 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 04:58:39,740 INFO L413 NwaCegarLoop]: 3351 mSDtfsCounter, 3509 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3509 SdHoareTripleChecker+Valid, 3580 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 04:58:39,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3509 Valid, 3580 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:58:39,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2023-11-19 04:58:39,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2355. [2023-11-19 04:58:39,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2241 states have (on average 1.853190539937528) internal successors, (4153), 2246 states have internal predecessors, (4153), 88 states have call successors, (88), 25 states have call predecessors, (88), 24 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2023-11-19 04:58:39,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 4327 transitions. [2023-11-19 04:58:39,901 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 4327 transitions. Word has length 131 [2023-11-19 04:58:39,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:39,902 INFO L495 AbstractCegarLoop]: Abstraction has 2355 states and 4327 transitions. [2023-11-19 04:58:39,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:58:39,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 4327 transitions. [2023-11-19 04:58:39,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-19 04:58:39,910 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:39,910 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:58:39,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:40,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:40,137 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:40,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:40,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1956476662, now seen corresponding path program 1 times [2023-11-19 04:58:40,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:40,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800797969] [2023-11-19 04:58:40,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:40,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:40,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:40,503 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 04:58:40,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:40,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800797969] [2023-11-19 04:58:40,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800797969] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:40,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421398624] [2023-11-19 04:58:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:40,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:40,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:40,508 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:40,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:58:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:40,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:58:40,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:40,869 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-19 04:58:40,869 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:58:40,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421398624] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:40,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:58:40,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 04:58:40,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255193950] [2023-11-19 04:58:40,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:40,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:58:40,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:40,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:58:40,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:58:40,874 INFO L87 Difference]: Start difference. First operand 2355 states and 4327 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:58:41,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:41,632 INFO L93 Difference]: Finished difference Result 3760 states and 6462 transitions. [2023-11-19 04:58:41,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:58:41,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 131 [2023-11-19 04:58:41,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:41,659 INFO L225 Difference]: With dead ends: 3760 [2023-11-19 04:58:41,659 INFO L226 Difference]: Without dead ends: 3051 [2023-11-19 04:58:41,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 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 04:58:41,666 INFO L413 NwaCegarLoop]: 3331 mSDtfsCounter, 3521 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3521 SdHoareTripleChecker+Valid, 3560 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:41,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3521 Valid, 3560 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 04:58:41,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2023-11-19 04:58:41,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 3043. [2023-11-19 04:58:41,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3043 states, 2827 states have (on average 1.772550406791652) internal successors, (5011), 2834 states have internal predecessors, (5011), 166 states have call successors, (166), 49 states have call predecessors, (166), 48 states have return successors, (164), 160 states have call predecessors, (164), 164 states have call successors, (164) [2023-11-19 04:58:41,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 5341 transitions. [2023-11-19 04:58:41,846 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 5341 transitions. Word has length 131 [2023-11-19 04:58:41,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:41,847 INFO L495 AbstractCegarLoop]: Abstraction has 3043 states and 5341 transitions. [2023-11-19 04:58:41,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:58:41,848 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 5341 transitions. [2023-11-19 04:58:41,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-19 04:58:41,856 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:41,856 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:58:41,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:42,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:42,072 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:42,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:42,073 INFO L85 PathProgramCache]: Analyzing trace with hash 525109324, now seen corresponding path program 1 times [2023-11-19 04:58:42,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:42,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569078517] [2023-11-19 04:58:42,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:42,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:42,412 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 04:58:42,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:42,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569078517] [2023-11-19 04:58:42,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569078517] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:42,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120788092] [2023-11-19 04:58:42,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:42,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:42,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:42,422 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:42,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:58:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:42,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:58:42,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-19 04:58:42,811 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:58:42,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120788092] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:42,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:58:42,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 04:58:42,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150506476] [2023-11-19 04:58:42,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:42,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:58:42,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:42,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:58:42,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:58:42,815 INFO L87 Difference]: Start difference. First operand 3043 states and 5341 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:58:43,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:43,626 INFO L93 Difference]: Finished difference Result 5812 states and 9534 transitions. [2023-11-19 04:58:43,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:58:43,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 131 [2023-11-19 04:58:43,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:43,664 INFO L225 Difference]: With dead ends: 5812 [2023-11-19 04:58:43,665 INFO L226 Difference]: Without dead ends: 4415 [2023-11-19 04:58:43,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 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 04:58:43,678 INFO L413 NwaCegarLoop]: 3347 mSDtfsCounter, 3527 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3527 SdHoareTripleChecker+Valid, 3576 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 04:58:43,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3527 Valid, 3576 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:58:43,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4415 states. [2023-11-19 04:58:43,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4415 to 4403. [2023-11-19 04:58:43,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4403 states, 3987 states have (on average 1.6812139453222974) internal successors, (6703), 3998 states have internal predecessors, (6703), 318 states have call successors, (318), 97 states have call predecessors, (318), 96 states have return successors, (316), 308 states have call predecessors, (316), 316 states have call successors, (316) [2023-11-19 04:58:43,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4403 states to 4403 states and 7337 transitions. [2023-11-19 04:58:43,999 INFO L78 Accepts]: Start accepts. Automaton has 4403 states and 7337 transitions. Word has length 131 [2023-11-19 04:58:43,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:43,999 INFO L495 AbstractCegarLoop]: Abstraction has 4403 states and 7337 transitions. [2023-11-19 04:58:44,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:58:44,000 INFO L276 IsEmpty]: Start isEmpty. Operand 4403 states and 7337 transitions. [2023-11-19 04:58:44,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-19 04:58:44,013 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:44,013 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:58:44,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:44,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:44,236 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:44,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:44,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1490456078, now seen corresponding path program 1 times [2023-11-19 04:58:44,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:44,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798831561] [2023-11-19 04:58:44,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:44,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:44,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 04:58:44,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:44,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798831561] [2023-11-19 04:58:44,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798831561] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:44,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423519067] [2023-11-19 04:58:44,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:44,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:44,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:44,478 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:44,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:58:44,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:44,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:58:44,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:44,855 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 04:58:44,855 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:58:44,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423519067] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:44,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:58:44,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 04:58:44,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84982870] [2023-11-19 04:58:44,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:44,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:58:44,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:44,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:58:44,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:58:44,866 INFO L87 Difference]: Start difference. First operand 4403 states and 7337 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:58:45,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:45,781 INFO L93 Difference]: Finished difference Result 9868 states and 15578 transitions. [2023-11-19 04:58:45,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:58:45,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 131 [2023-11-19 04:58:45,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:45,829 INFO L225 Difference]: With dead ends: 9868 [2023-11-19 04:58:45,829 INFO L226 Difference]: Without dead ends: 7111 [2023-11-19 04:58:45,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 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 04:58:45,843 INFO L413 NwaCegarLoop]: 3293 mSDtfsCounter, 3515 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3515 SdHoareTripleChecker+Valid, 3522 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:45,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3515 Valid, 3522 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:58:45,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7111 states. [2023-11-19 04:58:46,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7111 to 7091. [2023-11-19 04:58:46,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7091 states, 6283 states have (on average 1.5978035970077988) internal successors, (10039), 6302 states have internal predecessors, (10039), 614 states have call successors, (614), 193 states have call predecessors, (614), 192 states have return successors, (612), 596 states have call predecessors, (612), 612 states have call successors, (612) [2023-11-19 04:58:46,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7091 states to 7091 states and 11265 transitions. [2023-11-19 04:58:46,195 INFO L78 Accepts]: Start accepts. Automaton has 7091 states and 11265 transitions. Word has length 131 [2023-11-19 04:58:46,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:46,196 INFO L495 AbstractCegarLoop]: Abstraction has 7091 states and 11265 transitions. [2023-11-19 04:58:46,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:58:46,197 INFO L276 IsEmpty]: Start isEmpty. Operand 7091 states and 11265 transitions. [2023-11-19 04:58:46,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-19 04:58:46,213 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:46,213 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:58:46,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:46,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:46,432 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:46,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:46,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1493588272, now seen corresponding path program 1 times [2023-11-19 04:58:46,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:46,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098698508] [2023-11-19 04:58:46,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:46,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 04:58:46,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:46,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098698508] [2023-11-19 04:58:46,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098698508] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:46,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342452632] [2023-11-19 04:58:46,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:46,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:46,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:46,656 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:46,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:58:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:46,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 952 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:58:46,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:46,940 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-19 04:58:46,940 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:58:46,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342452632] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:46,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:58:46,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 04:58:46,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064629615] [2023-11-19 04:58:46,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:46,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:58:46,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:46,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:58:46,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:58:46,943 INFO L87 Difference]: Start difference. First operand 7091 states and 11265 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:58:47,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:47,734 INFO L93 Difference]: Finished difference Result 17884 states and 27466 transitions. [2023-11-19 04:58:47,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:58:47,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 131 [2023-11-19 04:58:47,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:47,830 INFO L225 Difference]: With dead ends: 17884 [2023-11-19 04:58:47,830 INFO L226 Difference]: Without dead ends: 12439 [2023-11-19 04:58:47,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 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 04:58:47,861 INFO L413 NwaCegarLoop]: 3343 mSDtfsCounter, 3530 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3530 SdHoareTripleChecker+Valid, 3572 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 04:58:47,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3530 Valid, 3572 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:58:47,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12439 states. [2023-11-19 04:58:48,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12439 to 12403. [2023-11-19 04:58:48,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12403 states, 10827 states have (on average 1.534589452295188) internal successors, (16615), 10862 states have internal predecessors, (16615), 1190 states have call successors, (1190), 385 states have call predecessors, (1190), 384 states have return successors, (1188), 1156 states have call predecessors, (1188), 1188 states have call successors, (1188) [2023-11-19 04:58:48,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12403 states to 12403 states and 18993 transitions. [2023-11-19 04:58:48,669 INFO L78 Accepts]: Start accepts. Automaton has 12403 states and 18993 transitions. Word has length 131 [2023-11-19 04:58:48,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:48,672 INFO L495 AbstractCegarLoop]: Abstraction has 12403 states and 18993 transitions. [2023-11-19 04:58:48,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:58:48,672 INFO L276 IsEmpty]: Start isEmpty. Operand 12403 states and 18993 transitions. [2023-11-19 04:58:48,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-19 04:58:48,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:48,699 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:58:48,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:48,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:48,912 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:48,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:48,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1949453874, now seen corresponding path program 1 times [2023-11-19 04:58:48,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:48,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256710289] [2023-11-19 04:58:48,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:48,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:48,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:49,150 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 04:58:49,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:49,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256710289] [2023-11-19 04:58:49,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256710289] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:49,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16570154] [2023-11-19 04:58:49,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:49,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:49,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:49,152 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:49,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 04:58:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:49,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 946 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:58:49,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:58:49,487 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:58:49,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16570154] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:49,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:58:49,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 04:58:49,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929256729] [2023-11-19 04:58:49,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:49,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:58:49,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:49,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:58:49,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:58:49,493 INFO L87 Difference]: Start difference. First operand 12403 states and 18993 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:58:50,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:50,753 INFO L93 Difference]: Finished difference Result 33724 states and 50842 transitions. [2023-11-19 04:58:50,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:58:50,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 131 [2023-11-19 04:58:50,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:50,857 INFO L225 Difference]: With dead ends: 33724 [2023-11-19 04:58:50,857 INFO L226 Difference]: Without dead ends: 22967 [2023-11-19 04:58:50,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 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 04:58:50,898 INFO L413 NwaCegarLoop]: 3293 mSDtfsCounter, 3503 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3503 SdHoareTripleChecker+Valid, 3522 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:50,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3503 Valid, 3522 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:58:50,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22967 states. [2023-11-19 04:58:51,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22967 to 22899. [2023-11-19 04:58:51,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22899 states, 19819 states have (on average 1.492254906907513) internal successors, (29575), 19886 states have internal predecessors, (29575), 2310 states have call successors, (2310), 769 states have call predecessors, (2310), 768 states have return successors, (2308), 2244 states have call predecessors, (2308), 2308 states have call successors, (2308) [2023-11-19 04:58:51,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22899 states to 22899 states and 34193 transitions. [2023-11-19 04:58:51,999 INFO L78 Accepts]: Start accepts. Automaton has 22899 states and 34193 transitions. Word has length 131 [2023-11-19 04:58:52,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:52,000 INFO L495 AbstractCegarLoop]: Abstraction has 22899 states and 34193 transitions. [2023-11-19 04:58:52,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:58:52,000 INFO L276 IsEmpty]: Start isEmpty. Operand 22899 states and 34193 transitions. [2023-11-19 04:58:52,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-19 04:58:52,043 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:52,044 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:58:52,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:52,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1677cc3c-f7e7-41da-88eb-a4779432a247/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:52,266 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:52,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:52,266 INFO L85 PathProgramCache]: Analyzing trace with hash -716284528, now seen corresponding path program 1 times [2023-11-19 04:58:52,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:52,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813100036] [2023-11-19 04:58:52,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:52,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:53,236 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-19 04:58:53,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:53,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813100036] [2023-11-19 04:58:53,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813100036] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:53,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:58:53,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:58:53,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7042865] [2023-11-19 04:58:53,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:53,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:58:53,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:53,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:58:53,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:58:53,240 INFO L87 Difference]: Start difference. First operand 22899 states and 34193 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)