./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/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_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/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_c9a472a8-0342-4592-807b-8b0dfb30d560/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 7ee209640ee994f311a04b9c2d813fadfd34b19e8b71a748e88ebcbbe5883af1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:17:35,042 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:17:35,133 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:17:35,141 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:17:35,142 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:17:35,169 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:17:35,170 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:17:35,170 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:17:35,171 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:17:35,172 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:17:35,172 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:17:35,173 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:17:35,174 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:17:35,174 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:17:35,175 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:17:35,175 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:17:35,176 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:17:35,176 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:17:35,177 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:17:35,177 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:17:35,178 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:17:35,178 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:17:35,179 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:17:35,180 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:17:35,180 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:17:35,181 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:17:35,181 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:17:35,182 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:17:35,182 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:17:35,183 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:17:35,183 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:17:35,183 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:17:35,184 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:17:35,191 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:17:35,192 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:17:35,192 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:17:35,193 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:17:35,193 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:17:35,194 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:17:35,194 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:17:35,194 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:17:35,195 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:17:35,196 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:17:35,196 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:17:35,196 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:17:35,197 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_c9a472a8-0342-4592-807b-8b0dfb30d560/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ee209640ee994f311a04b9c2d813fadfd34b19e8b71a748e88ebcbbe5883af1 [2023-11-19 05:17:35,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:17:35,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:17:35,577 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:17:35,578 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:17:35,579 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:17:35,582 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-2.c [2023-11-19 05:17:38,708 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:17:39,466 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:17:39,467 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-2.c [2023-11-19 05:17:39,536 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/data/b93dae003/76d2d05cfea54c2e8bbb729be2e8233e/FLAG9a90317f7 [2023-11-19 05:17:39,560 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/data/b93dae003/76d2d05cfea54c2e8bbb729be2e8233e [2023-11-19 05:17:39,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:17:39,571 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:17:39,573 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:17:39,573 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:17:39,580 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:17:39,581 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:17:39" (1/1) ... [2023-11-19 05:17:39,582 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@886b576 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:39, skipping insertion in model container [2023-11-19 05:17:39,583 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:17:39" (1/1) ... [2023-11-19 05:17:39,911 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:17:42,362 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_c9a472a8-0342-4592-807b-8b0dfb30d560/sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-2.c[381679,381692] [2023-11-19 05:17:42,398 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_c9a472a8-0342-4592-807b-8b0dfb30d560/sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-2.c[383339,383352] [2023-11-19 05:17:42,726 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:17:42,741 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:17:44,043 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_c9a472a8-0342-4592-807b-8b0dfb30d560/sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-2.c[381679,381692] [2023-11-19 05:17:44,048 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_c9a472a8-0342-4592-807b-8b0dfb30d560/sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-2.c[383339,383352] [2023-11-19 05:17:44,065 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:17:44,145 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:17:44,146 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:44 WrapperNode [2023-11-19 05:17:44,146 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:17:44,147 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:17:44,148 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:17:44,148 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:17:44,155 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:44" (1/1) ... [2023-11-19 05:17:44,329 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:44" (1/1) ... [2023-11-19 05:17:44,762 INFO L138 Inliner]: procedures = 54, calls = 57, calls flagged for inlining = 31, calls inlined = 31, statements flattened = 12814 [2023-11-19 05:17:44,762 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:17:44,764 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:17:44,764 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:17:44,764 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:17:44,776 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:44" (1/1) ... [2023-11-19 05:17:44,793 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:44" (1/1) ... [2023-11-19 05:17:44,967 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:44" (1/1) ... [2023-11-19 05:17:44,967 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:44" (1/1) ... [2023-11-19 05:17:45,218 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:44" (1/1) ... [2023-11-19 05:17:45,278 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:44" (1/1) ... [2023-11-19 05:17:45,301 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:44" (1/1) ... [2023-11-19 05:17:45,330 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:44" (1/1) ... [2023-11-19 05:17:45,394 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:17:45,397 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:17:45,398 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:17:45,398 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:17:45,399 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:44" (1/1) ... [2023-11-19 05:17:45,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:17:45,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:45,434 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:17:45,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:17:45,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:17:45,479 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-19 05:17:45,480 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-19 05:17:45,480 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-19 05:17:45,480 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-19 05:17:45,480 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-19 05:17:45,481 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-19 05:17:45,481 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-19 05:17:45,481 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-19 05:17:45,481 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-19 05:17:45,481 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-19 05:17:45,482 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-19 05:17:45,482 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-19 05:17:45,482 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-19 05:17:45,482 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-19 05:17:45,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:17:45,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:17:45,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:17:45,616 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:17:45,619 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:17:55,181 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:17:58,105 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:17:58,106 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-11-19 05:17:58,129 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:17:58 BoogieIcfgContainer [2023-11-19 05:17:58,129 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:17:58,133 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:17:58,134 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:17:58,137 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:17:58,138 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:17:39" (1/3) ... [2023-11-19 05:17:58,140 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147a981c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:17:58, skipping insertion in model container [2023-11-19 05:17:58,140 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:44" (2/3) ... [2023-11-19 05:17:58,141 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147a981c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:17:58, skipping insertion in model container [2023-11-19 05:17:58,141 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:17:58" (3/3) ... [2023-11-19 05:17:58,142 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.05.cil-2.c [2023-11-19 05:17:58,162 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:17:58,162 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 05:17:58,261 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:17:58,268 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;@65c8885f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:17:58,269 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 05:17:58,281 INFO L276 IsEmpty]: Start isEmpty. Operand has 1766 states, 1735 states have (on average 1.9671469740634007) internal successors, (3413), 1740 states have internal predecessors, (3413), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-19 05:17:58,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-19 05:17:58,294 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:58,296 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:58,296 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:58,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:58,304 INFO L85 PathProgramCache]: Analyzing trace with hash -801890952, now seen corresponding path program 1 times [2023-11-19 05:17:58,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:58,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526763777] [2023-11-19 05:17:58,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:58,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:58,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:58,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526763777] [2023-11-19 05:17:58,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526763777] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:58,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:58,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:17:58,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658813215] [2023-11-19 05:17:58,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:58,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:17:58,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:58,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:17:58,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:17:58,921 INFO L87 Difference]: Start difference. First operand has 1766 states, 1735 states have (on average 1.9671469740634007) internal successors, (3413), 1740 states have internal predecessors, (3413), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 05:17:59,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:59,897 INFO L93 Difference]: Finished difference Result 3631 states and 7073 transitions. [2023-11-19 05:17:59,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:17:59,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 47 [2023-11-19 05:17:59,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:59,929 INFO L225 Difference]: With dead ends: 3631 [2023-11-19 05:17:59,930 INFO L226 Difference]: Without dead ends: 1864 [2023-11-19 05:17:59,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:17:59,942 INFO L413 NwaCegarLoop]: 3320 mSDtfsCounter, 3568 mSDsluCounter, 3248 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3568 SdHoareTripleChecker+Valid, 6568 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:59,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3568 Valid, 6568 Invalid, 632 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 05:17:59,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2023-11-19 05:18:00,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1863. [2023-11-19 05:18:00,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1813 states have (on average 1.9382239382239381) internal successors, (3514), 1817 states have internal predecessors, (3514), 36 states have call successors, (36), 13 states have call predecessors, (36), 12 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-19 05:18:00,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 3584 transitions. [2023-11-19 05:18:00,088 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 3584 transitions. Word has length 47 [2023-11-19 05:18:00,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:00,089 INFO L495 AbstractCegarLoop]: Abstraction has 1863 states and 3584 transitions. [2023-11-19 05:18:00,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 05:18:00,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 3584 transitions. [2023-11-19 05:18:00,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-19 05:18:00,095 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:00,096 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:18:00,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:18:00,096 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:00,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:00,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1604124217, now seen corresponding path program 1 times [2023-11-19 05:18:00,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:00,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525787862] [2023-11-19 05:18:00,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:00,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:00,422 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:18:00,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:00,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525787862] [2023-11-19 05:18:00,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525787862] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:18:00,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085143736] [2023-11-19 05:18:00,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:00,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:00,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:18:00,433 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:18:00,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:18:00,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:00,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:18:00,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:18:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 05:18:00,711 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:18:00,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085143736] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:00,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:18:00,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:18:00,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177149860] [2023-11-19 05:18:00,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:00,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:18:00,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:00,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:18:00,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:18:00,716 INFO L87 Difference]: Start difference. First operand 1863 states and 3584 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (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 05:18:01,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:01,203 INFO L93 Difference]: Finished difference Result 2290 states and 4205 transitions. [2023-11-19 05:18:01,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:18:01,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (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 89 [2023-11-19 05:18:01,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:01,225 INFO L225 Difference]: With dead ends: 2290 [2023-11-19 05:18:01,225 INFO L226 Difference]: Without dead ends: 2073 [2023-11-19 05:18:01,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:18:01,230 INFO L413 NwaCegarLoop]: 3243 mSDtfsCounter, 3413 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3413 SdHoareTripleChecker+Valid, 3376 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:01,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3413 Valid, 3376 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:18:01,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2023-11-19 05:18:01,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 2067. [2023-11-19 05:18:01,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 1977 states have (on average 1.8942842690945878) internal successors, (3745), 1982 states have internal predecessors, (3745), 64 states have call successors, (64), 25 states have call predecessors, (64), 24 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-19 05:18:01,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 3871 transitions. [2023-11-19 05:18:01,324 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 3871 transitions. Word has length 89 [2023-11-19 05:18:01,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:01,325 INFO L495 AbstractCegarLoop]: Abstraction has 2067 states and 3871 transitions. [2023-11-19 05:18:01,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (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 05:18:01,325 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 3871 transitions. [2023-11-19 05:18:01,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-19 05:18:01,332 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:01,332 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:18:01,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 05:18:01,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-19 05:18:01,557 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:01,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:01,558 INFO L85 PathProgramCache]: Analyzing trace with hash -2043053111, now seen corresponding path program 1 times [2023-11-19 05:18:01,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:01,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657324999] [2023-11-19 05:18:01,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:01,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:18:01,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:01,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657324999] [2023-11-19 05:18:01,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657324999] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:18:01,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262388063] [2023-11-19 05:18:01,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:01,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:01,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:18:01,794 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:18:01,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:18:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:01,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:18:01,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:18:02,045 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-19 05:18:02,045 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:18:02,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262388063] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:02,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:18:02,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:18:02,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165659041] [2023-11-19 05:18:02,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:02,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:18:02,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:02,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:18:02,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:18:02,054 INFO L87 Difference]: Start difference. First operand 2067 states and 3871 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 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 05:18:02,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:02,640 INFO L93 Difference]: Finished difference Result 2896 states and 5070 transitions. [2023-11-19 05:18:02,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:18:02,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 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 89 [2023-11-19 05:18:02,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:02,659 INFO L225 Difference]: With dead ends: 2896 [2023-11-19 05:18:02,659 INFO L226 Difference]: Without dead ends: 2475 [2023-11-19 05:18:02,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:18:02,664 INFO L413 NwaCegarLoop]: 3197 mSDtfsCounter, 3416 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3416 SdHoareTripleChecker+Valid, 3330 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:02,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3416 Valid, 3330 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:18:02,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2023-11-19 05:18:02,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 2467. [2023-11-19 05:18:02,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2467 states, 2299 states have (on average 1.8247063940843846) internal successors, (4195), 2306 states have internal predecessors, (4195), 118 states have call successors, (118), 49 states have call predecessors, (118), 48 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2023-11-19 05:18:02,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2467 states to 2467 states and 4429 transitions. [2023-11-19 05:18:02,774 INFO L78 Accepts]: Start accepts. Automaton has 2467 states and 4429 transitions. Word has length 89 [2023-11-19 05:18:02,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:02,774 INFO L495 AbstractCegarLoop]: Abstraction has 2467 states and 4429 transitions. [2023-11-19 05:18:02,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 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 05:18:02,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2467 states and 4429 transitions. [2023-11-19 05:18:02,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-19 05:18:02,778 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:02,778 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:18:02,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:18:02,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:02,998 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:02,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:02,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1682055, now seen corresponding path program 1 times [2023-11-19 05:18:02,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:02,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332588039] [2023-11-19 05:18:03,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:03,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:18:03,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:03,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332588039] [2023-11-19 05:18:03,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332588039] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:18:03,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792136828] [2023-11-19 05:18:03,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:03,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:03,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:18:03,176 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:18:03,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:18:03,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:03,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:18:03,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:18:03,410 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:18:03,410 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:18:03,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792136828] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:03,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:18:03,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:18:03,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11355547] [2023-11-19 05:18:03,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:03,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:18:03,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:03,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:18:03,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:18:03,414 INFO L87 Difference]: Start difference. First operand 2467 states and 4429 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (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 05:18:03,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:03,967 INFO L93 Difference]: Finished difference Result 4084 states and 6750 transitions. [2023-11-19 05:18:03,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:18:03,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (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 89 [2023-11-19 05:18:03,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:03,992 INFO L225 Difference]: With dead ends: 4084 [2023-11-19 05:18:03,992 INFO L226 Difference]: Without dead ends: 3263 [2023-11-19 05:18:03,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:18:04,000 INFO L413 NwaCegarLoop]: 3197 mSDtfsCounter, 3407 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3407 SdHoareTripleChecker+Valid, 3330 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:04,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3407 Valid, 3330 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:18:04,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3263 states. [2023-11-19 05:18:04,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3263 to 3251. [2023-11-19 05:18:04,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3251 states, 2931 states have (on average 1.7301262367792563) internal successors, (5071), 2942 states have internal predecessors, (5071), 222 states have call successors, (222), 97 states have call predecessors, (222), 96 states have return successors, (220), 212 states have call predecessors, (220), 220 states have call successors, (220) [2023-11-19 05:18:04,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3251 states to 3251 states and 5513 transitions. [2023-11-19 05:18:04,195 INFO L78 Accepts]: Start accepts. Automaton has 3251 states and 5513 transitions. Word has length 89 [2023-11-19 05:18:04,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:04,195 INFO L495 AbstractCegarLoop]: Abstraction has 3251 states and 5513 transitions. [2023-11-19 05:18:04,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (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 05:18:04,196 INFO L276 IsEmpty]: Start isEmpty. Operand 3251 states and 5513 transitions. [2023-11-19 05:18:04,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-19 05:18:04,201 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:04,201 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:18:04,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:18:04,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:04,415 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:04,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:04,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1093906935, now seen corresponding path program 1 times [2023-11-19 05:18:04,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:04,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579578388] [2023-11-19 05:18:04,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:04,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:04,540 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-19 05:18:04,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:04,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579578388] [2023-11-19 05:18:04,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579578388] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:04,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:18:04,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:18:04,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720674408] [2023-11-19 05:18:04,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:04,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:18:04,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:04,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:18:04,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:18:04,544 INFO L87 Difference]: Start difference. First operand 3251 states and 5513 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:18:05,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:05,174 INFO L93 Difference]: Finished difference Result 4527 states and 7340 transitions. [2023-11-19 05:18:05,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:18:05,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 89 [2023-11-19 05:18:05,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:05,207 INFO L225 Difference]: With dead ends: 4527 [2023-11-19 05:18:05,207 INFO L226 Difference]: Without dead ends: 3691 [2023-11-19 05:18:05,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:18:05,214 INFO L413 NwaCegarLoop]: 3271 mSDtfsCounter, 69 mSDsluCounter, 3203 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 6474 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:05,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 6474 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:18:05,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3691 states. [2023-11-19 05:18:05,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3691 to 3543. [2023-11-19 05:18:05,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3543 states, 3207 states have (on average 1.7159338946055505) internal successors, (5503), 3218 states have internal predecessors, (5503), 230 states have call successors, (230), 105 states have call predecessors, (230), 104 states have return successors, (228), 220 states have call predecessors, (228), 228 states have call successors, (228) [2023-11-19 05:18:05,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3543 states to 3543 states and 5961 transitions. [2023-11-19 05:18:05,368 INFO L78 Accepts]: Start accepts. Automaton has 3543 states and 5961 transitions. Word has length 89 [2023-11-19 05:18:05,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:05,371 INFO L495 AbstractCegarLoop]: Abstraction has 3543 states and 5961 transitions. [2023-11-19 05:18:05,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:18:05,371 INFO L276 IsEmpty]: Start isEmpty. Operand 3543 states and 5961 transitions. [2023-11-19 05:18:05,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-19 05:18:05,381 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:05,381 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:18:05,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:18:05,382 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:05,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:05,382 INFO L85 PathProgramCache]: Analyzing trace with hash 708430767, now seen corresponding path program 1 times [2023-11-19 05:18:05,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:05,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813784872] [2023-11-19 05:18:05,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:05,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:05,485 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-19 05:18:05,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:05,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813784872] [2023-11-19 05:18:05,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813784872] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:05,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:18:05,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:18:05,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943305127] [2023-11-19 05:18:05,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:05,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:18:05,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:05,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:18:05,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:18:05,488 INFO L87 Difference]: Start difference. First operand 3543 states and 5961 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:18:06,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:06,181 INFO L93 Difference]: Finished difference Result 7264 states and 11306 transitions. [2023-11-19 05:18:06,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:18:06,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 119 [2023-11-19 05:18:06,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:06,218 INFO L225 Difference]: With dead ends: 7264 [2023-11-19 05:18:06,219 INFO L226 Difference]: Without dead ends: 5367 [2023-11-19 05:18:06,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:18:06,228 INFO L413 NwaCegarLoop]: 3199 mSDtfsCounter, 3406 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3406 SdHoareTripleChecker+Valid, 3332 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:06,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3406 Valid, 3332 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:18:06,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5367 states. [2023-11-19 05:18:06,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5367 to 5339. [2023-11-19 05:18:06,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5339 states, 4691 states have (on average 1.6147942869324239) internal successors, (7575), 4710 states have internal predecessors, (7575), 438 states have call successors, (438), 209 states have call predecessors, (438), 208 states have return successors, (436), 420 states have call predecessors, (436), 436 states have call successors, (436) [2023-11-19 05:18:06,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5339 states to 5339 states and 8449 transitions. [2023-11-19 05:18:06,477 INFO L78 Accepts]: Start accepts. Automaton has 5339 states and 8449 transitions. Word has length 119 [2023-11-19 05:18:06,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:06,477 INFO L495 AbstractCegarLoop]: Abstraction has 5339 states and 8449 transitions. [2023-11-19 05:18:06,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:18:06,478 INFO L276 IsEmpty]: Start isEmpty. Operand 5339 states and 8449 transitions. [2023-11-19 05:18:06,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-19 05:18:06,490 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:06,490 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:18:06,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:18:06,491 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:06,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:06,491 INFO L85 PathProgramCache]: Analyzing trace with hash -322157195, now seen corresponding path program 1 times [2023-11-19 05:18:06,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:06,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682345217] [2023-11-19 05:18:06,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:06,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:06,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:06,575 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-19 05:18:06,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:06,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682345217] [2023-11-19 05:18:06,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682345217] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:06,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:18:06,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:18:06,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801846548] [2023-11-19 05:18:06,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:06,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:18:06,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:06,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:18:06,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:18:06,578 INFO L87 Difference]: Start difference. First operand 5339 states and 8449 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:18:07,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:07,241 INFO L93 Difference]: Finished difference Result 12580 states and 18730 transitions. [2023-11-19 05:18:07,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:18:07,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 119 [2023-11-19 05:18:07,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:07,316 INFO L225 Difference]: With dead ends: 12580 [2023-11-19 05:18:07,316 INFO L226 Difference]: Without dead ends: 8887 [2023-11-19 05:18:07,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:18:07,334 INFO L413 NwaCegarLoop]: 3224 mSDtfsCounter, 3409 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3409 SdHoareTripleChecker+Valid, 3357 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:07,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3409 Valid, 3357 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:18:07,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8887 states. [2023-11-19 05:18:07,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8887 to 8835. [2023-11-19 05:18:07,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8835 states, 7579 states have (on average 1.5251352421163742) internal successors, (11559), 7614 states have internal predecessors, (11559), 838 states have call successors, (838), 417 states have call predecessors, (838), 416 states have return successors, (836), 804 states have call predecessors, (836), 836 states have call successors, (836) [2023-11-19 05:18:07,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8835 states to 8835 states and 13233 transitions. [2023-11-19 05:18:07,768 INFO L78 Accepts]: Start accepts. Automaton has 8835 states and 13233 transitions. Word has length 119 [2023-11-19 05:18:07,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:07,769 INFO L495 AbstractCegarLoop]: Abstraction has 8835 states and 13233 transitions. [2023-11-19 05:18:07,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:18:07,769 INFO L276 IsEmpty]: Start isEmpty. Operand 8835 states and 13233 transitions. [2023-11-19 05:18:07,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-19 05:18:07,801 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:07,802 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 05:18:07,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 05:18:07,802 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:07,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:07,803 INFO L85 PathProgramCache]: Analyzing trace with hash 643881545, now seen corresponding path program 1 times [2023-11-19 05:18:07,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:07,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946126084] [2023-11-19 05:18:07,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:07,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:07,968 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-11-19 05:18:07,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:07,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946126084] [2023-11-19 05:18:07,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946126084] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:18:07,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561095398] [2023-11-19 05:18:07,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:07,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:07,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:18:07,974 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:18:07,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:18:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:08,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:18:08,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:18:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 05:18:08,244 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:18:08,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561095398] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:08,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:18:08,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-19 05:18:08,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562319176] [2023-11-19 05:18:08,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:08,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:18:08,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:08,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:18:08,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:18:08,248 INFO L87 Difference]: Start difference. First operand 8835 states and 13233 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 05:18:09,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:09,361 INFO L93 Difference]: Finished difference Result 14891 states and 21879 transitions. [2023-11-19 05:18:09,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:18:09,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 135 [2023-11-19 05:18:09,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:09,413 INFO L225 Difference]: With dead ends: 14891 [2023-11-19 05:18:09,413 INFO L226 Difference]: Without dead ends: 11199 [2023-11-19 05:18:09,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:18:09,430 INFO L413 NwaCegarLoop]: 3267 mSDtfsCounter, 84 mSDsluCounter, 3202 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 6469 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:09,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 6469 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 05:18:09,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11199 states. [2023-11-19 05:18:10,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11199 to 10363. [2023-11-19 05:18:10,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10363 states, 9011 states have (on average 1.526023748751526) internal successors, (13751), 9046 states have internal predecessors, (13751), 886 states have call successors, (886), 465 states have call predecessors, (886), 464 states have return successors, (884), 852 states have call predecessors, (884), 884 states have call successors, (884) [2023-11-19 05:18:10,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10363 states to 10363 states and 15521 transitions. [2023-11-19 05:18:10,129 INFO L78 Accepts]: Start accepts. Automaton has 10363 states and 15521 transitions. Word has length 135 [2023-11-19 05:18:10,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:10,131 INFO L495 AbstractCegarLoop]: Abstraction has 10363 states and 15521 transitions. [2023-11-19 05:18:10,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 05:18:10,132 INFO L276 IsEmpty]: Start isEmpty. Operand 10363 states and 15521 transitions. [2023-11-19 05:18:10,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-19 05:18:10,178 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:10,183 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-19 05:18:10,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:18:10,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 05:18:10,399 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:10,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:10,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1615310064, now seen corresponding path program 1 times [2023-11-19 05:18:10,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:10,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384080021] [2023-11-19 05:18:10,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:10,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:10,651 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-19 05:18:10,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:10,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384080021] [2023-11-19 05:18:10,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384080021] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:18:10,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458398329] [2023-11-19 05:18:10,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:10,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:10,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:18:10,666 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:18:10,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:18:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:10,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:18:10,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:18:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 05:18:10,927 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:18:10,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458398329] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:10,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:18:10,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-19 05:18:10,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530832316] [2023-11-19 05:18:10,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:10,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:18:10,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:10,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:18:10,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:18:10,930 INFO L87 Difference]: Start difference. First operand 10363 states and 15521 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 05:18:12,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:12,065 INFO L93 Difference]: Finished difference Result 18051 states and 26527 transitions. [2023-11-19 05:18:12,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:18:12,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 135 [2023-11-19 05:18:12,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:12,131 INFO L225 Difference]: With dead ends: 18051 [2023-11-19 05:18:12,132 INFO L226 Difference]: Without dead ends: 13607 [2023-11-19 05:18:12,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:18:12,152 INFO L413 NwaCegarLoop]: 3296 mSDtfsCounter, 96 mSDsluCounter, 3204 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 6500 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:12,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 6500 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:18:12,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13607 states. [2023-11-19 05:18:13,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13607 to 12547. [2023-11-19 05:18:13,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12547 states, 11051 states have (on average 1.5223056736946883) internal successors, (16823), 11086 states have internal predecessors, (16823), 958 states have call successors, (958), 537 states have call predecessors, (958), 536 states have return successors, (956), 924 states have call predecessors, (956), 956 states have call successors, (956) [2023-11-19 05:18:13,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12547 states to 12547 states and 18737 transitions. [2023-11-19 05:18:13,075 INFO L78 Accepts]: Start accepts. Automaton has 12547 states and 18737 transitions. Word has length 135 [2023-11-19 05:18:13,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:13,076 INFO L495 AbstractCegarLoop]: Abstraction has 12547 states and 18737 transitions. [2023-11-19 05:18:13,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 05:18:13,076 INFO L276 IsEmpty]: Start isEmpty. Operand 12547 states and 18737 transitions. [2023-11-19 05:18:13,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-19 05:18:13,113 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:13,114 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 05:18:13,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:18:13,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:13,337 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:13,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:13,338 INFO L85 PathProgramCache]: Analyzing trace with hash 28835003, now seen corresponding path program 1 times [2023-11-19 05:18:13,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:13,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307052349] [2023-11-19 05:18:13,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:13,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:13,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-11-19 05:18:13,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:13,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307052349] [2023-11-19 05:18:13,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307052349] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:18:13,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892343419] [2023-11-19 05:18:13,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:13,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:13,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:18:13,493 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:18:13,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:18:13,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:13,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:18:13,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:18:13,726 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 05:18:13,726 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:18:13,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892343419] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:13,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:18:13,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-19 05:18:13,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98731320] [2023-11-19 05:18:13,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:13,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:18:13,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:13,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:18:13,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:18:13,733 INFO L87 Difference]: Start difference. First operand 12547 states and 18737 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 05:18:14,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:14,709 INFO L93 Difference]: Finished difference Result 22531 states and 33139 transitions. [2023-11-19 05:18:14,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:18:14,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 135 [2023-11-19 05:18:14,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:14,769 INFO L225 Difference]: With dead ends: 22531 [2023-11-19 05:18:14,769 INFO L226 Difference]: Without dead ends: 16923 [2023-11-19 05:18:14,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:18:14,786 INFO L413 NwaCegarLoop]: 3301 mSDtfsCounter, 102 mSDsluCounter, 3204 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 6505 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:14,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 6505 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:18:14,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16923 states. [2023-11-19 05:18:15,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16923 to 15751. [2023-11-19 05:18:15,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15751 states, 14039 states have (on average 1.5162760880404587) internal successors, (21287), 14074 states have internal predecessors, (21287), 1066 states have call successors, (1066), 645 states have call predecessors, (1066), 644 states have return successors, (1064), 1032 states have call predecessors, (1064), 1064 states have call successors, (1064) [2023-11-19 05:18:15,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15751 states to 15751 states and 23417 transitions. [2023-11-19 05:18:15,434 INFO L78 Accepts]: Start accepts. Automaton has 15751 states and 23417 transitions. Word has length 135 [2023-11-19 05:18:15,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:15,434 INFO L495 AbstractCegarLoop]: Abstraction has 15751 states and 23417 transitions. [2023-11-19 05:18:15,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 05:18:15,435 INFO L276 IsEmpty]: Start isEmpty. Operand 15751 states and 23417 transitions. [2023-11-19 05:18:15,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-19 05:18:15,476 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:15,477 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:18:15,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 05:18:15,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:15,693 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:15,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:15,693 INFO L85 PathProgramCache]: Analyzing trace with hash -900717699, now seen corresponding path program 1 times [2023-11-19 05:18:15,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:15,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421256162] [2023-11-19 05:18:15,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:15,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:16,325 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-19 05:18:16,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:16,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421256162] [2023-11-19 05:18:16,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421256162] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:18:16,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004064316] [2023-11-19 05:18:16,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:16,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:16,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:18:16,329 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:18:16,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a472a8-0342-4592-807b-8b0dfb30d560/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 05:18:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:16,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-19 05:18:16,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:18:16,983 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 60 proven. 26 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-19 05:18:16,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:18:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 47 proven. 3 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-19 05:18:17,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004064316] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:18:17,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1637911504] [2023-11-19 05:18:17,542 INFO L159 IcfgInterpreter]: Started Sifa with 75 locations of interest [2023-11-19 05:18:17,542 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:18:17,546 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:18:17,551 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:18:17,552 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs