./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire --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 d5e8784cabcb38b73600d610d5b7e0bbbbf790f527b046ae80f9a34c4ea82403 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:37:24,900 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:37:25,041 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:37:25,059 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:37:25,061 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:37:25,111 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:37:25,112 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:37:25,113 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:37:25,114 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:37:25,119 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:37:25,120 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:37:25,121 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:37:25,122 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:37:25,123 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:37:25,124 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:37:25,124 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:37:25,125 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:37:25,125 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:37:25,126 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:37:25,126 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:37:25,127 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:37:25,127 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:37:25,128 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:37:25,129 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:37:25,129 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:37:25,129 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:37:25,130 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:37:25,130 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:37:25,131 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:37:25,131 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:37:25,133 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:37:25,133 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:37:25,133 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:37:25,133 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:37:25,134 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:37:25,134 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:37:25,134 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:37:25,134 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:37:25,135 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:37:25,135 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:37:25,135 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:37:25,136 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:37:25,136 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:37:25,136 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:37:25,137 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:37:25,137 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:37:25,137 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:37:25,138 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d5e8784cabcb38b73600d610d5b7e0bbbbf790f527b046ae80f9a34c4ea82403 [2023-11-23 20:37:25,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:37:25,585 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:37:25,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:37:25,591 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:37:25,591 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:37:25,593 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-1.c [2023-11-23 20:37:28,907 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:37:29,739 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:37:29,739 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-1.c [2023-11-23 20:37:29,873 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/data/438e9e172/972f0a3500af4c5a811f4ba6eb96b797/FLAGbfcdacb58 [2023-11-23 20:37:29,893 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/data/438e9e172/972f0a3500af4c5a811f4ba6eb96b797 [2023-11-23 20:37:29,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:37:29,902 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:37:29,905 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:37:29,906 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:37:29,912 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:37:29,913 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:37:29" (1/1) ... [2023-11-23 20:37:29,915 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38efb394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:29, skipping insertion in model container [2023-11-23 20:37:29,915 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:37:29" (1/1) ... [2023-11-23 20:37:30,259 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:37:32,775 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_57db0517-3259-4066-a200-c07c63c315e9/sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-1.c[381679,381692] [2023-11-23 20:37:32,803 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_57db0517-3259-4066-a200-c07c63c315e9/sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-1.c[383339,383352] [2023-11-23 20:37:33,021 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:37:33,032 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:37:34,191 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_57db0517-3259-4066-a200-c07c63c315e9/sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-1.c[381679,381692] [2023-11-23 20:37:34,197 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_57db0517-3259-4066-a200-c07c63c315e9/sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-1.c[383339,383352] [2023-11-23 20:37:34,209 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:37:34,332 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:37:34,333 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:34 WrapperNode [2023-11-23 20:37:34,333 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:37:34,334 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:37:34,335 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:37:34,335 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:37:34,343 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:34" (1/1) ... [2023-11-23 20:37:34,465 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:34" (1/1) ... [2023-11-23 20:37:34,901 INFO L138 Inliner]: procedures = 50, calls = 51, calls flagged for inlining = 27, calls inlined = 27, statements flattened = 12694 [2023-11-23 20:37:34,901 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:37:34,902 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:37:34,902 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:37:34,902 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:37:34,920 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:34" (1/1) ... [2023-11-23 20:37:34,921 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:34" (1/1) ... [2023-11-23 20:37:34,980 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:34" (1/1) ... [2023-11-23 20:37:34,980 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:34" (1/1) ... [2023-11-23 20:37:35,256 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:34" (1/1) ... [2023-11-23 20:37:35,305 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:34" (1/1) ... [2023-11-23 20:37:35,325 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:34" (1/1) ... [2023-11-23 20:37:35,444 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:34" (1/1) ... [2023-11-23 20:37:35,496 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:37:35,497 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:37:35,497 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:37:35,497 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:37:35,498 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:34" (1/1) ... [2023-11-23 20:37:35,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:37:35,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:35,530 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:37:35,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:37:35,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:37:35,578 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-23 20:37:35,579 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-23 20:37:35,579 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-23 20:37:35,579 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-23 20:37:35,579 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-23 20:37:35,580 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-23 20:37:35,580 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-23 20:37:35,580 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-23 20:37:35,580 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-23 20:37:35,580 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-23 20:37:35,580 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-23 20:37:35,581 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-23 20:37:35,581 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-23 20:37:35,581 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-23 20:37:35,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:37:35,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:37:35,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:37:35,703 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:37:35,706 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:37:44,991 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:37:47,868 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:37:47,869 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-23 20:37:47,872 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:47 BoogieIcfgContainer [2023-11-23 20:37:47,872 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:37:47,875 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:37:47,876 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:37:47,879 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:37:47,879 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:37:29" (1/3) ... [2023-11-23 20:37:47,881 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f937649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:37:47, skipping insertion in model container [2023-11-23 20:37:47,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:34" (2/3) ... [2023-11-23 20:37:47,882 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f937649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:37:47, skipping insertion in model container [2023-11-23 20:37:47,882 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:47" (3/3) ... [2023-11-23 20:37:47,883 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.03.cil-1.c [2023-11-23 20:37:47,903 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:37:47,904 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 20:37:48,006 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:37:48,014 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;@73b0f467, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:37:48,015 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 20:37:48,030 INFO L276 IsEmpty]: Start isEmpty. Operand has 1742 states, 1713 states have (on average 1.9725627553998832) internal successors, (3379), 1718 states have internal predecessors, (3379), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-23 20:37:48,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-23 20:37:48,044 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:48,045 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] [2023-11-23 20:37:48,045 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:48,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:48,050 INFO L85 PathProgramCache]: Analyzing trace with hash 947301417, now seen corresponding path program 1 times [2023-11-23 20:37:48,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:48,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402710109] [2023-11-23 20:37:48,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:48,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:48,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:37:48,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:48,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402710109] [2023-11-23 20:37:48,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402710109] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:48,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:48,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:37:48,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563310482] [2023-11-23 20:37:48,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:48,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:37:48,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:48,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:37:48,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:48,629 INFO L87 Difference]: Start difference. First operand has 1742 states, 1713 states have (on average 1.9725627553998832) internal successors, (3379), 1718 states have internal predecessors, (3379), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2023-11-23 20:37:49,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:49,538 INFO L93 Difference]: Finished difference Result 3559 states and 6955 transitions. [2023-11-23 20:37:49,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:37:49,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 41 [2023-11-23 20:37:49,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:49,573 INFO L225 Difference]: With dead ends: 3559 [2023-11-23 20:37:49,573 INFO L226 Difference]: Without dead ends: 1816 [2023-11-23 20:37:49,585 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 [2023-11-23 20:37:49,590 INFO L413 NwaCegarLoop]: 3256 mSDtfsCounter, 3498 mSDsluCounter, 3192 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3498 SdHoareTripleChecker+Valid, 6448 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:49,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3498 Valid, 6448 Invalid, 600 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 20:37:49,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2023-11-23 20:37:49,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1815. [2023-11-23 20:37:49,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1769 states have (on average 1.9479932165065008) internal successors, (3446), 1773 states have internal predecessors, (3446), 32 states have call successors, (32), 13 states have call predecessors, (32), 12 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-23 20:37:49,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 3508 transitions. [2023-11-23 20:37:49,729 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 3508 transitions. Word has length 41 [2023-11-23 20:37:49,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:49,729 INFO L495 AbstractCegarLoop]: Abstraction has 1815 states and 3508 transitions. [2023-11-23 20:37:49,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2023-11-23 20:37:49,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 3508 transitions. [2023-11-23 20:37:49,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-23 20:37:49,735 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:49,735 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:49,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:37:49,736 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:49,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:49,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1035602615, now seen corresponding path program 1 times [2023-11-23 20:37:49,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:49,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981715937] [2023-11-23 20:37:49,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:49,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:49,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:37:49,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:49,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981715937] [2023-11-23 20:37:49,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981715937] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:37:49,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918733381] [2023-11-23 20:37:49,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:49,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:49,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:49,957 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:49,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:37:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:50,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:37:50,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:50,176 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 20:37:50,176 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:50,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918733381] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:50,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:37:50,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 20:37:50,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218303729] [2023-11-23 20:37:50,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:50,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:50,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:50,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:50,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:37:50,183 INFO L87 Difference]: Start difference. First operand 1815 states and 3508 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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) [2023-11-23 20:37:50,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:50,646 INFO L93 Difference]: Finished difference Result 2146 states and 3973 transitions. [2023-11-23 20:37:50,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:50,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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 75 [2023-11-23 20:37:50,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:50,661 INFO L225 Difference]: With dead ends: 2146 [2023-11-23 20:37:50,662 INFO L226 Difference]: Without dead ends: 1977 [2023-11-23 20:37:50,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:37:50,665 INFO L413 NwaCegarLoop]: 3207 mSDtfsCounter, 3375 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3375 SdHoareTripleChecker+Valid, 3308 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:50,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3375 Valid, 3308 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:37:50,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2023-11-23 20:37:50,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 1971. [2023-11-23 20:37:50,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1971 states, 1889 states have (on average 1.9105346744309157) internal successors, (3609), 1894 states have internal predecessors, (3609), 56 states have call successors, (56), 25 states have call predecessors, (56), 24 states have return successors, (54), 52 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-23 20:37:50,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1971 states to 1971 states and 3719 transitions. [2023-11-23 20:37:50,751 INFO L78 Accepts]: Start accepts. Automaton has 1971 states and 3719 transitions. Word has length 75 [2023-11-23 20:37:50,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:50,751 INFO L495 AbstractCegarLoop]: Abstraction has 1971 states and 3719 transitions. [2023-11-23 20:37:50,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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) [2023-11-23 20:37:50,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1971 states and 3719 transitions. [2023-11-23 20:37:50,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-23 20:37:50,754 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:50,755 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:50,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:50,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:50,977 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:50,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:50,977 INFO L85 PathProgramCache]: Analyzing trace with hash 93632011, now seen corresponding path program 1 times [2023-11-23 20:37:50,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:50,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154099968] [2023-11-23 20:37:50,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:50,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:50,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:51,163 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:37:51,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:51,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154099968] [2023-11-23 20:37:51,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154099968] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:37:51,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820784219] [2023-11-23 20:37:51,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:51,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:51,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:51,166 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:51,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:37:51,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:51,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:37:51,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:51,348 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 20:37:51,348 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:51,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820784219] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:51,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:37:51,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 20:37:51,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381061801] [2023-11-23 20:37:51,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:51,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:51,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:51,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:51,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:37:51,351 INFO L87 Difference]: Start difference. First operand 1971 states and 3719 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 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) [2023-11-23 20:37:51,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:51,923 INFO L93 Difference]: Finished difference Result 2608 states and 4606 transitions. [2023-11-23 20:37:51,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:51,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 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 75 [2023-11-23 20:37:51,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:51,941 INFO L225 Difference]: With dead ends: 2608 [2023-11-23 20:37:51,941 INFO L226 Difference]: Without dead ends: 2283 [2023-11-23 20:37:51,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:37:51,945 INFO L413 NwaCegarLoop]: 3205 mSDtfsCounter, 3378 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3378 SdHoareTripleChecker+Valid, 3306 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:51,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3378 Valid, 3306 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:37:51,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2023-11-23 20:37:52,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 2275. [2023-11-23 20:37:52,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2275 states, 2123 states have (on average 1.8478568064060292) internal successors, (3923), 2130 states have internal predecessors, (3923), 102 states have call successors, (102), 49 states have call predecessors, (102), 48 states have return successors, (100), 96 states have call predecessors, (100), 100 states have call successors, (100) [2023-11-23 20:37:52,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 4125 transitions. [2023-11-23 20:37:52,073 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 4125 transitions. Word has length 75 [2023-11-23 20:37:52,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:52,074 INFO L495 AbstractCegarLoop]: Abstraction has 2275 states and 4125 transitions. [2023-11-23 20:37:52,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 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) [2023-11-23 20:37:52,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 4125 transitions. [2023-11-23 20:37:52,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-23 20:37:52,078 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:52,078 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:52,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:52,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:52,300 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:52,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:52,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1356454391, now seen corresponding path program 1 times [2023-11-23 20:37:52,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:52,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75298115] [2023-11-23 20:37:52,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:52,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:52,886 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 20:37:52,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:52,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75298115] [2023-11-23 20:37:52,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75298115] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:52,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:52,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 20:37:52,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149510784] [2023-11-23 20:37:52,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:52,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:37:52,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:52,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:37:52,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:37:52,890 INFO L87 Difference]: Start difference. First operand 2275 states and 4125 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-23 20:37:54,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:54,149 INFO L93 Difference]: Finished difference Result 3579 states and 5883 transitions. [2023-11-23 20:37:54,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 20:37:54,150 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 75 [2023-11-23 20:37:54,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:54,170 INFO L225 Difference]: With dead ends: 3579 [2023-11-23 20:37:54,171 INFO L226 Difference]: Without dead ends: 2951 [2023-11-23 20:37:54,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-23 20:37:54,177 INFO L413 NwaCegarLoop]: 3175 mSDtfsCounter, 3577 mSDsluCounter, 9412 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3589 SdHoareTripleChecker+Valid, 12587 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:54,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3589 Valid, 12587 Invalid, 1136 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [82 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 20:37:54,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2023-11-23 20:37:54,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2851. [2023-11-23 20:37:54,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2851 states, 2563 states have (on average 1.7569254779555208) internal successors, (4503), 2574 states have internal predecessors, (4503), 190 states have call successors, (190), 97 states have call predecessors, (190), 96 states have return successors, (188), 180 states have call predecessors, (188), 188 states have call successors, (188) [2023-11-23 20:37:54,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 4881 transitions. [2023-11-23 20:37:54,337 INFO L78 Accepts]: Start accepts. Automaton has 2851 states and 4881 transitions. Word has length 75 [2023-11-23 20:37:54,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:54,338 INFO L495 AbstractCegarLoop]: Abstraction has 2851 states and 4881 transitions. [2023-11-23 20:37:54,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-23 20:37:54,339 INFO L276 IsEmpty]: Start isEmpty. Operand 2851 states and 4881 transitions. [2023-11-23 20:37:54,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-23 20:37:54,342 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:54,343 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-23 20:37:54,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:37:54,343 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:54,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:54,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1752130380, now seen corresponding path program 1 times [2023-11-23 20:37:54,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:54,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048187865] [2023-11-23 20:37:54,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:54,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:54,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:54,606 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 20:37:54,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:54,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048187865] [2023-11-23 20:37:54,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048187865] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:37:54,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229615352] [2023-11-23 20:37:54,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:54,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:54,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:54,608 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:54,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:37:54,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:54,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:37:54,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:54,776 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-23 20:37:54,776 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:54,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229615352] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:54,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:37:54,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-23 20:37:54,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958157542] [2023-11-23 20:37:54,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:54,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:54,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:54,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:54,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:37:54,779 INFO L87 Difference]: Start difference. First operand 2851 states and 4881 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 20:37:55,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:55,357 INFO L93 Difference]: Finished difference Result 3802 states and 6174 transitions. [2023-11-23 20:37:55,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:55,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 89 [2023-11-23 20:37:55,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:55,378 INFO L225 Difference]: With dead ends: 3802 [2023-11-23 20:37:55,378 INFO L226 Difference]: Without dead ends: 3166 [2023-11-23 20:37:55,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:37:55,383 INFO L413 NwaCegarLoop]: 3218 mSDtfsCounter, 47 mSDsluCounter, 3168 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 6386 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:55,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 6386 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:37:55,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3166 states. [2023-11-23 20:37:55,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3166 to 3035. [2023-11-23 20:37:55,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3035 states, 2731 states have (on average 1.7396558037348957) internal successors, (4751), 2742 states have internal predecessors, (4751), 198 states have call successors, (198), 105 states have call predecessors, (198), 104 states have return successors, (196), 188 states have call predecessors, (196), 196 states have call successors, (196) [2023-11-23 20:37:55,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3035 states to 3035 states and 5145 transitions. [2023-11-23 20:37:55,538 INFO L78 Accepts]: Start accepts. Automaton has 3035 states and 5145 transitions. Word has length 89 [2023-11-23 20:37:55,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:55,538 INFO L495 AbstractCegarLoop]: Abstraction has 3035 states and 5145 transitions. [2023-11-23 20:37:55,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 20:37:55,539 INFO L276 IsEmpty]: Start isEmpty. Operand 3035 states and 5145 transitions. [2023-11-23 20:37:55,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-23 20:37:55,544 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:55,544 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 20:37:55,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:55,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:55,766 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:55,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:55,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1586568283, now seen corresponding path program 1 times [2023-11-23 20:37:55,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:55,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226625244] [2023-11-23 20:37:55,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:55,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:55,854 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-23 20:37:55,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:55,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226625244] [2023-11-23 20:37:55,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226625244] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:55,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:55,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:55,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899062796] [2023-11-23 20:37:55,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:55,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:55,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:55,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:55,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:55,858 INFO L87 Difference]: Start difference. First operand 3035 states and 5145 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, (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) [2023-11-23 20:37:56,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:56,395 INFO L93 Difference]: Finished difference Result 5116 states and 7974 transitions. [2023-11-23 20:37:56,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:56,396 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, (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 99 [2023-11-23 20:37:56,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:56,421 INFO L225 Difference]: With dead ends: 5116 [2023-11-23 20:37:56,421 INFO L226 Difference]: Without dead ends: 3727 [2023-11-23 20:37:56,427 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 [2023-11-23 20:37:56,427 INFO L413 NwaCegarLoop]: 3207 mSDtfsCounter, 3370 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3370 SdHoareTripleChecker+Valid, 3308 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:56,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3370 Valid, 3308 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:37:56,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3727 states. [2023-11-23 20:37:56,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3727 to 3711. [2023-11-23 20:37:56,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3711 states, 3263 states have (on average 1.6705485749310451) internal successors, (5451), 3278 states have internal predecessors, (5451), 290 states have call successors, (290), 157 states have call predecessors, (290), 156 states have return successors, (288), 276 states have call predecessors, (288), 288 states have call successors, (288) [2023-11-23 20:37:56,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3711 states to 3711 states and 6029 transitions. [2023-11-23 20:37:56,624 INFO L78 Accepts]: Start accepts. Automaton has 3711 states and 6029 transitions. Word has length 99 [2023-11-23 20:37:56,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:56,624 INFO L495 AbstractCegarLoop]: Abstraction has 3711 states and 6029 transitions. [2023-11-23 20:37:56,625 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, (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) [2023-11-23 20:37:56,625 INFO L276 IsEmpty]: Start isEmpty. Operand 3711 states and 6029 transitions. [2023-11-23 20:37:56,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-23 20:37:56,633 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:56,635 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] [2023-11-23 20:37:56,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 20:37:56,635 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:56,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:56,636 INFO L85 PathProgramCache]: Analyzing trace with hash 668434590, now seen corresponding path program 1 times [2023-11-23 20:37:56,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:56,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122186200] [2023-11-23 20:37:56,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:56,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:56,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:56,909 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-23 20:37:56,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:56,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122186200] [2023-11-23 20:37:56,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122186200] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:37:56,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958888236] [2023-11-23 20:37:56,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:56,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:56,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:56,911 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:56,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:37:57,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:57,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:37:57,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:57,122 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:37:57,123 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:57,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958888236] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:57,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:37:57,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-23 20:37:57,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313229629] [2023-11-23 20:37:57,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:57,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:57,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:57,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:57,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:37:57,126 INFO L87 Difference]: Start difference. First operand 3711 states and 6029 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2023-11-23 20:37:57,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:57,754 INFO L93 Difference]: Finished difference Result 5111 states and 7995 transitions. [2023-11-23 20:37:57,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:57,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 113 [2023-11-23 20:37:57,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:57,777 INFO L225 Difference]: With dead ends: 5111 [2023-11-23 20:37:57,777 INFO L226 Difference]: Without dead ends: 3723 [2023-11-23 20:37:57,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:37:57,784 INFO L413 NwaCegarLoop]: 3221 mSDtfsCounter, 102 mSDsluCounter, 3158 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 6379 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:57,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 6379 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:37:57,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2023-11-23 20:37:58,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 3703. [2023-11-23 20:37:58,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3703 states, 3255 states have (on average 1.6599078341013824) internal successors, (5403), 3270 states have internal predecessors, (5403), 290 states have call successors, (290), 157 states have call predecessors, (290), 156 states have return successors, (288), 276 states have call predecessors, (288), 288 states have call successors, (288) [2023-11-23 20:37:58,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3703 states to 3703 states and 5981 transitions. [2023-11-23 20:37:58,088 INFO L78 Accepts]: Start accepts. Automaton has 3703 states and 5981 transitions. Word has length 113 [2023-11-23 20:37:58,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:58,089 INFO L495 AbstractCegarLoop]: Abstraction has 3703 states and 5981 transitions. [2023-11-23 20:37:58,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2023-11-23 20:37:58,090 INFO L276 IsEmpty]: Start isEmpty. Operand 3703 states and 5981 transitions. [2023-11-23 20:37:58,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-23 20:37:58,099 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:58,099 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2023-11-23 20:37:58,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:58,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:58,319 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:58,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:58,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1833707454, now seen corresponding path program 1 times [2023-11-23 20:37:58,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:58,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720983299] [2023-11-23 20:37:58,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:58,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:58,589 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-23 20:37:58,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:58,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720983299] [2023-11-23 20:37:58,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720983299] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:37:58,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523507529] [2023-11-23 20:37:58,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:58,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:58,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:58,591 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:58,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 20:37:58,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:58,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:37:58,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-23 20:37:58,786 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:58,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523507529] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:58,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:37:58,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-23 20:37:58,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562120468] [2023-11-23 20:37:58,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:58,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:58,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:58,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:58,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:37:58,794 INFO L87 Difference]: Start difference. First operand 3703 states and 5981 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-23 20:37:59,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:59,410 INFO L93 Difference]: Finished difference Result 5523 states and 8362 transitions. [2023-11-23 20:37:59,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:59,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 113 [2023-11-23 20:37:59,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:59,457 INFO L225 Difference]: With dead ends: 5523 [2023-11-23 20:37:59,457 INFO L226 Difference]: Without dead ends: 4151 [2023-11-23 20:37:59,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:37:59,465 INFO L413 NwaCegarLoop]: 3178 mSDtfsCounter, 3380 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3380 SdHoareTripleChecker+Valid, 3202 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:59,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3380 Valid, 3202 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:37:59,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2023-11-23 20:37:59,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 4151. [2023-11-23 20:37:59,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4151 states, 3639 states have (on average 1.606760098928277) internal successors, (5847), 3654 states have internal predecessors, (5847), 310 states have call successors, (310), 201 states have call predecessors, (310), 200 states have return successors, (308), 296 states have call predecessors, (308), 308 states have call successors, (308) [2023-11-23 20:37:59,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4151 states to 4151 states and 6465 transitions. [2023-11-23 20:37:59,663 INFO L78 Accepts]: Start accepts. Automaton has 4151 states and 6465 transitions. Word has length 113 [2023-11-23 20:37:59,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:59,663 INFO L495 AbstractCegarLoop]: Abstraction has 4151 states and 6465 transitions. [2023-11-23 20:37:59,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-23 20:37:59,664 INFO L276 IsEmpty]: Start isEmpty. Operand 4151 states and 6465 transitions. [2023-11-23 20:37:59,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-23 20:37:59,672 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:59,672 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2023-11-23 20:37:59,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:59,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:59,888 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:59,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:59,889 INFO L85 PathProgramCache]: Analyzing trace with hash 719451365, now seen corresponding path program 1 times [2023-11-23 20:37:59,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:59,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112701531] [2023-11-23 20:37:59,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:59,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:00,160 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-23 20:38:00,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:00,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112701531] [2023-11-23 20:38:00,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112701531] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:38:00,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96139187] [2023-11-23 20:38:00,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:00,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:00,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:00,162 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:00,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 20:38:00,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:00,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:38:00,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:38:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 20:38:00,352 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:38:00,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96139187] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:00,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:38:00,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-23 20:38:00,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850711808] [2023-11-23 20:38:00,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:00,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:38:00,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:00,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:38:00,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:38:00,355 INFO L87 Difference]: Start difference. First operand 4151 states and 6465 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-23 20:38:00,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:00,995 INFO L93 Difference]: Finished difference Result 7559 states and 10884 transitions. [2023-11-23 20:38:00,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:38:00,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 114 [2023-11-23 20:38:00,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:01,015 INFO L225 Difference]: With dead ends: 7559 [2023-11-23 20:38:01,015 INFO L226 Difference]: Without dead ends: 5055 [2023-11-23 20:38:01,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:38:01,025 INFO L413 NwaCegarLoop]: 3181 mSDtfsCounter, 60 mSDsluCounter, 3149 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 6330 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:01,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 6330 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:38:01,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5055 states. [2023-11-23 20:38:01,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5055 to 4415. [2023-11-23 20:38:01,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4415 states, 3875 states have (on average 1.5976774193548386) internal successors, (6191), 3891 states have internal predecessors, (6191), 324 states have call successors, (324), 215 states have call predecessors, (324), 214 states have return successors, (322), 309 states have call predecessors, (322), 322 states have call successors, (322) [2023-11-23 20:38:01,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4415 states to 4415 states and 6837 transitions. [2023-11-23 20:38:01,265 INFO L78 Accepts]: Start accepts. Automaton has 4415 states and 6837 transitions. Word has length 114 [2023-11-23 20:38:01,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:01,266 INFO L495 AbstractCegarLoop]: Abstraction has 4415 states and 6837 transitions. [2023-11-23 20:38:01,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-23 20:38:01,266 INFO L276 IsEmpty]: Start isEmpty. Operand 4415 states and 6837 transitions. [2023-11-23 20:38:01,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-23 20:38:01,275 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:01,275 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:38:01,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 20:38:01,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-23 20:38:01,497 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:01,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:01,497 INFO L85 PathProgramCache]: Analyzing trace with hash 591273028, now seen corresponding path program 1 times [2023-11-23 20:38:01,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:01,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159570351] [2023-11-23 20:38:01,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:01,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:01,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-23 20:38:01,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:01,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159570351] [2023-11-23 20:38:01,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159570351] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:38:01,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183427284] [2023-11-23 20:38:01,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:01,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:01,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:01,615 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:01,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 20:38:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:01,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:38:01,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:38:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 20:38:01,795 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:38:01,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183427284] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:01,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:38:01,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-23 20:38:01,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539936112] [2023-11-23 20:38:01,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:01,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:38:01,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:01,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:38:01,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:38:01,799 INFO L87 Difference]: Start difference. First operand 4415 states and 6837 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2023-11-23 20:38:02,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:02,670 INFO L93 Difference]: Finished difference Result 6851 states and 10037 transitions. [2023-11-23 20:38:02,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:38:02,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 114 [2023-11-23 20:38:02,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:02,693 INFO L225 Difference]: With dead ends: 6851 [2023-11-23 20:38:02,693 INFO L226 Difference]: Without dead ends: 5013 [2023-11-23 20:38:02,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:38:02,700 INFO L413 NwaCegarLoop]: 3216 mSDtfsCounter, 63 mSDsluCounter, 3168 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 6384 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:02,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 6384 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:38:02,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5013 states. [2023-11-23 20:38:02,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5013 to 4735. [2023-11-23 20:38:02,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4735 states, 4163 states have (on average 1.5909200096084555) internal successors, (6623), 4179 states have internal predecessors, (6623), 340 states have call successors, (340), 231 states have call predecessors, (340), 230 states have return successors, (338), 325 states have call predecessors, (338), 338 states have call successors, (338) [2023-11-23 20:38:03,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4735 states to 4735 states and 7301 transitions. [2023-11-23 20:38:03,015 INFO L78 Accepts]: Start accepts. Automaton has 4735 states and 7301 transitions. Word has length 114 [2023-11-23 20:38:03,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:03,016 INFO L495 AbstractCegarLoop]: Abstraction has 4735 states and 7301 transitions. [2023-11-23 20:38:03,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2023-11-23 20:38:03,017 INFO L276 IsEmpty]: Start isEmpty. Operand 4735 states and 7301 transitions. [2023-11-23 20:38:03,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-23 20:38:03,031 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:03,032 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2023-11-23 20:38:03,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 20:38:03,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:03,245 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:03,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:03,246 INFO L85 PathProgramCache]: Analyzing trace with hash -699293202, now seen corresponding path program 1 times [2023-11-23 20:38:03,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:03,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828966190] [2023-11-23 20:38:03,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:03,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-23 20:38:03,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:03,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828966190] [2023-11-23 20:38:03,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828966190] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:38:03,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887053107] [2023-11-23 20:38:03,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:03,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:03,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:03,544 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:03,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 20:38:03,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:03,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 20:38:03,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:38:03,877 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 20:38:03,877 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:38:03,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887053107] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:03,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:38:03,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-11-23 20:38:03,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138484663] [2023-11-23 20:38:03,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:03,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:38:03,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:03,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:38:03,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:38:03,881 INFO L87 Difference]: Start difference. First operand 4735 states and 7301 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-23 20:38:04,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:04,739 INFO L93 Difference]: Finished difference Result 7669 states and 11201 transitions. [2023-11-23 20:38:04,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:38:04,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 116 [2023-11-23 20:38:04,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:04,765 INFO L225 Difference]: With dead ends: 7669 [2023-11-23 20:38:04,765 INFO L226 Difference]: Without dead ends: 6067 [2023-11-23 20:38:04,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:38:04,773 INFO L413 NwaCegarLoop]: 3243 mSDtfsCounter, 6710 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6710 SdHoareTripleChecker+Valid, 3345 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:04,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6710 Valid, 3345 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:38:04,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6067 states. [2023-11-23 20:38:05,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6067 to 5888. [2023-11-23 20:38:05,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5888 states, 5189 states have (on average 1.5328579687801118) internal successors, (7954), 5205 states have internal predecessors, (7954), 392 states have call successors, (392), 306 states have call predecessors, (392), 305 states have return successors, (412), 377 states have call predecessors, (412), 390 states have call successors, (412) [2023-11-23 20:38:05,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5888 states to 5888 states and 8758 transitions. [2023-11-23 20:38:05,201 INFO L78 Accepts]: Start accepts. Automaton has 5888 states and 8758 transitions. Word has length 116 [2023-11-23 20:38:05,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:05,202 INFO L495 AbstractCegarLoop]: Abstraction has 5888 states and 8758 transitions. [2023-11-23 20:38:05,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-23 20:38:05,202 INFO L276 IsEmpty]: Start isEmpty. Operand 5888 states and 8758 transitions. [2023-11-23 20:38:05,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-23 20:38:05,215 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:05,216 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 20:38:05,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 20:38:05,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:05,438 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:05,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:05,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1648817458, now seen corresponding path program 1 times [2023-11-23 20:38:05,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:05,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060240996] [2023-11-23 20:38:05,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:05,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:05,576 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-23 20:38:05,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:05,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060240996] [2023-11-23 20:38:05,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060240996] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:38:05,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379244581] [2023-11-23 20:38:05,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:05,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:05,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:05,578 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:05,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 20:38:05,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:05,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:38:05,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:38:05,775 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 20:38:05,775 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:38:05,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379244581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:05,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:38:05,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-23 20:38:05,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522758320] [2023-11-23 20:38:05,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:05,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:38:05,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:05,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:38:05,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:38:05,778 INFO L87 Difference]: Start difference. First operand 5888 states and 8758 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2023-11-23 20:38:06,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:06,716 INFO L93 Difference]: Finished difference Result 9714 states and 13825 transitions. [2023-11-23 20:38:06,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:38:06,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 117 [2023-11-23 20:38:06,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:06,740 INFO L225 Difference]: With dead ends: 9714 [2023-11-23 20:38:06,740 INFO L226 Difference]: Without dead ends: 7524 [2023-11-23 20:38:06,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:38:06,748 INFO L413 NwaCegarLoop]: 3243 mSDtfsCounter, 73 mSDsluCounter, 3170 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 6413 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:06,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 6413 Invalid, 484 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:38:06,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7524 states. [2023-11-23 20:38:07,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7524 to 6706. [2023-11-23 20:38:07,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6706 states, 5917 states have (on average 1.514449890147034) internal successors, (8961), 5933 states have internal predecessors, (8961), 437 states have call successors, (437), 351 states have call predecessors, (437), 350 states have return successors, (457), 422 states have call predecessors, (457), 435 states have call successors, (457) [2023-11-23 20:38:07,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6706 states to 6706 states and 9855 transitions. [2023-11-23 20:38:07,095 INFO L78 Accepts]: Start accepts. Automaton has 6706 states and 9855 transitions. Word has length 117 [2023-11-23 20:38:07,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:07,095 INFO L495 AbstractCegarLoop]: Abstraction has 6706 states and 9855 transitions. [2023-11-23 20:38:07,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2023-11-23 20:38:07,096 INFO L276 IsEmpty]: Start isEmpty. Operand 6706 states and 9855 transitions. [2023-11-23 20:38:07,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-23 20:38:07,108 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:07,109 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2023-11-23 20:38:07,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 20:38:07,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:07,325 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:07,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:07,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1209657368, now seen corresponding path program 1 times [2023-11-23 20:38:07,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:07,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224285407] [2023-11-23 20:38:07,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:07,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:07,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:07,724 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-23 20:38:07,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:07,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224285407] [2023-11-23 20:38:07,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224285407] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:38:07,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184216071] [2023-11-23 20:38:07,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:07,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:07,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:07,727 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:07,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57db0517-3259-4066-a200-c07c63c315e9/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 20:38:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:07,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 20:38:07,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:38:08,009 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-23 20:38:08,009 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:38:08,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184216071] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:08,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:38:08,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2023-11-23 20:38:08,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691510279] [2023-11-23 20:38:08,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:08,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:38:08,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:08,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:38:08,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-23 20:38:08,012 INFO L87 Difference]: Start difference. First operand 6706 states and 9855 transitions. Second operand has 7 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-23 20:38:09,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:09,326 INFO L93 Difference]: Finished difference Result 10580 states and 15071 transitions. [2023-11-23 20:38:09,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 20:38:09,327 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 121 [2023-11-23 20:38:09,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:09,357 INFO L225 Difference]: With dead ends: 10580 [2023-11-23 20:38:09,357 INFO L226 Difference]: Without dead ends: 7501 [2023-11-23 20:38:09,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-11-23 20:38:09,367 INFO L413 NwaCegarLoop]: 3252 mSDtfsCounter, 181 mSDsluCounter, 9772 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 13024 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:09,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 13024 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 20:38:09,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7501 states.