./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.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_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/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_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/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_577694b1-ef52-4fd6-88c0-3dcd2c448490/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 ef314c292717d2a6588e316ab1f60892c9568f1799857e58c021646ee7eb2cde --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:14:56,707 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:14:56,795 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:14:56,801 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:14:56,802 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:14:56,829 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:14:56,830 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:14:56,831 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:14:56,832 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:14:56,832 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:14:56,833 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:14:56,833 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:14:56,834 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:14:56,834 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:14:56,835 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:14:56,835 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:14:56,836 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:14:56,836 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:14:56,837 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:14:56,837 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:14:56,838 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:14:56,838 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:14:56,839 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:14:56,840 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:14:56,840 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:14:56,840 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:14:56,841 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:14:56,841 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:14:56,842 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:14:56,842 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:14:56,842 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:14:56,843 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:14:56,843 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:14:56,844 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:14:56,844 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:14:56,845 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:14:56,845 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:14:56,845 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:14:56,846 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:14:56,846 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:14:56,847 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:14:56,847 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:14:56,847 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:14:56,848 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:14:56,848 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:14:56,848 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:14:56,848 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:14:56,848 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_577694b1-ef52-4fd6-88c0-3dcd2c448490/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef314c292717d2a6588e316ab1f60892c9568f1799857e58c021646ee7eb2cde [2023-11-23 21:14:57,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:14:57,171 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:14:57,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:14:57,178 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:14:57,179 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:14:57,180 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c [2023-11-23 21:15:00,345 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:15:01,141 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:15:01,142 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c [2023-11-23 21:15:01,202 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/data/2961959e1/6c07f33e4f234836899aff4dab2f07da/FLAGe13707215 [2023-11-23 21:15:01,220 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/data/2961959e1/6c07f33e4f234836899aff4dab2f07da [2023-11-23 21:15:01,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:15:01,225 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:15:01,226 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:15:01,226 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:15:01,234 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:15:01,236 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:15:01" (1/1) ... [2023-11-23 21:15:01,237 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67ee8cfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:01, skipping insertion in model container [2023-11-23 21:15:01,237 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:15:01" (1/1) ... [2023-11-23 21:15:01,542 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:15:03,890 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_577694b1-ef52-4fd6-88c0-3dcd2c448490/sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c[377069,377082] [2023-11-23 21:15:03,929 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_577694b1-ef52-4fd6-88c0-3dcd2c448490/sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c[383339,383352] [2023-11-23 21:15:04,189 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:15:04,207 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:15:05,567 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_577694b1-ef52-4fd6-88c0-3dcd2c448490/sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c[377069,377082] [2023-11-23 21:15:05,586 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_577694b1-ef52-4fd6-88c0-3dcd2c448490/sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c[383339,383352] [2023-11-23 21:15:05,643 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:15:05,788 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:15:05,789 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:05 WrapperNode [2023-11-23 21:15:05,789 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:15:05,790 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:15:05,791 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:15:05,791 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:15:05,799 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:05" (1/1) ... [2023-11-23 21:15:05,937 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:05" (1/1) ... [2023-11-23 21:15:06,576 INFO L138 Inliner]: procedures = 58, calls = 62, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 12928 [2023-11-23 21:15:06,577 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:15:06,578 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:15:06,578 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:15:06,578 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:15:06,588 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:05" (1/1) ... [2023-11-23 21:15:06,604 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:05" (1/1) ... [2023-11-23 21:15:06,783 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:05" (1/1) ... [2023-11-23 21:15:06,783 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:05" (1/1) ... [2023-11-23 21:15:07,126 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:05" (1/1) ... [2023-11-23 21:15:07,224 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:05" (1/1) ... [2023-11-23 21:15:07,244 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:05" (1/1) ... [2023-11-23 21:15:07,263 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:05" (1/1) ... [2023-11-23 21:15:07,317 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:15:07,318 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:15:07,319 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:15:07,319 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:15:07,320 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:05" (1/1) ... [2023-11-23 21:15:07,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:15:07,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:07,354 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:15:07,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:15:07,398 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-23 21:15:07,398 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-23 21:15:07,399 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-23 21:15:07,399 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-23 21:15:07,399 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-23 21:15:07,400 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-23 21:15:07,400 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-23 21:15:07,400 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-23 21:15:07,400 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-23 21:15:07,400 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-23 21:15:07,400 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-23 21:15:07,401 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-23 21:15:07,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:15:07,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:15:07,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:15:07,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:15:07,574 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:15:07,577 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:15:17,008 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:15:19,717 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:15:19,717 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-23 21:15:19,721 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:15:19 BoogieIcfgContainer [2023-11-23 21:15:19,721 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:15:19,725 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:15:19,727 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:15:19,730 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:15:19,730 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:15:01" (1/3) ... [2023-11-23 21:15:19,732 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3037377e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:15:19, skipping insertion in model container [2023-11-23 21:15:19,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:05" (2/3) ... [2023-11-23 21:15:19,733 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3037377e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:15:19, skipping insertion in model container [2023-11-23 21:15:19,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:15:19" (3/3) ... [2023-11-23 21:15:19,735 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label40+token_ring.07.cil-1.c [2023-11-23 21:15:19,755 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:15:19,755 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 21:15:19,945 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:15:19,952 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;@41c6863e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:15:19,954 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 21:15:19,966 INFO L276 IsEmpty]: Start isEmpty. Operand has 1784 states, 1754 states have (on average 1.9618015963511972) internal successors, (3441), 1757 states have internal predecessors, (3441), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-23 21:15:19,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-23 21:15:19,976 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:19,977 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:19,977 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:19,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:19,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1431366973, now seen corresponding path program 1 times [2023-11-23 21:15:19,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:19,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933861594] [2023-11-23 21:15:19,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:19,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:20,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:20,519 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 21:15:20,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:20,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933861594] [2023-11-23 21:15:20,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933861594] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:20,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:15:20,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:15:20,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395984200] [2023-11-23 21:15:20,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:20,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:15:20,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:20,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:15:20,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:15:20,585 INFO L87 Difference]: Start difference. First operand has 1784 states, 1754 states have (on average 1.9618015963511972) internal successors, (3441), 1757 states have internal predecessors, (3441), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:15:21,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:21,589 INFO L93 Difference]: Finished difference Result 3692 states and 7171 transitions. [2023-11-23 21:15:21,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:15:21,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2023-11-23 21:15:21,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:21,616 INFO L225 Difference]: With dead ends: 3692 [2023-11-23 21:15:21,616 INFO L226 Difference]: Without dead ends: 1907 [2023-11-23 21:15:21,630 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 21:15:21,633 INFO L413 NwaCegarLoop]: 3377 mSDtfsCounter, 3630 mSDsluCounter, 3299 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3630 SdHoareTripleChecker+Valid, 6676 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:21,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3630 Valid, 6676 Invalid, 660 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 21:15:21,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2023-11-23 21:15:21,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1906. [2023-11-23 21:15:21,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1854 states have (on average 1.9288025889967637) internal successors, (3576), 1857 states have internal predecessors, (3576), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2023-11-23 21:15:21,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 3652 transitions. [2023-11-23 21:15:21,814 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 3652 transitions. Word has length 52 [2023-11-23 21:15:21,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:21,815 INFO L495 AbstractCegarLoop]: Abstraction has 1906 states and 3652 transitions. [2023-11-23 21:15:21,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:15:21,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 3652 transitions. [2023-11-23 21:15:21,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-23 21:15:21,832 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:21,832 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:15:21,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:15:21,834 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:21,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:21,835 INFO L85 PathProgramCache]: Analyzing trace with hash -648962537, now seen corresponding path program 1 times [2023-11-23 21:15:21,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:21,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002305729] [2023-11-23 21:15:21,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:21,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:21,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:22,234 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:15:22,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:22,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002305729] [2023-11-23 21:15:22,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002305729] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:15:22,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134191489] [2023-11-23 21:15:22,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:22,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:22,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:22,249 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:15:22,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:15:22,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:22,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:15:22,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:15:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 21:15:22,568 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:15:22,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134191489] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:22,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:15:22,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 21:15:22,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665740190] [2023-11-23 21:15:22,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:22,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:15:22,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:22,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:15:22,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:15:22,576 INFO L87 Difference]: Start difference. First operand 1906 states and 3652 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:15:23,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:23,150 INFO L93 Difference]: Finished difference Result 2419 states and 4413 transitions. [2023-11-23 21:15:23,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:15:23,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2023-11-23 21:15:23,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:23,172 INFO L225 Difference]: With dead ends: 2419 [2023-11-23 21:15:23,172 INFO L226 Difference]: Without dead ends: 2159 [2023-11-23 21:15:23,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 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 21:15:23,176 INFO L413 NwaCegarLoop]: 3265 mSDtfsCounter, 3443 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3443 SdHoareTripleChecker+Valid, 3423 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:23,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3443 Valid, 3423 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:15:23,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2159 states. [2023-11-23 21:15:23,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2159 to 2155. [2023-11-23 21:15:23,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2059 states have (on average 1.8790675084992714) internal successors, (3869), 2063 states have internal predecessors, (3869), 70 states have call successors, (70), 24 states have call predecessors, (70), 24 states have return successors, (70), 68 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-23 21:15:23,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 4009 transitions. [2023-11-23 21:15:23,291 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 4009 transitions. Word has length 102 [2023-11-23 21:15:23,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:23,292 INFO L495 AbstractCegarLoop]: Abstraction has 2155 states and 4009 transitions. [2023-11-23 21:15:23,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:15:23,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 4009 transitions. [2023-11-23 21:15:23,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-23 21:15:23,297 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:23,298 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:15:23,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:15:23,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:23,517 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:23,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:23,517 INFO L85 PathProgramCache]: Analyzing trace with hash 2061167253, now seen corresponding path program 1 times [2023-11-23 21:15:23,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:23,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781776611] [2023-11-23 21:15:23,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:23,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:23,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:23,767 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:15:23,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:23,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781776611] [2023-11-23 21:15:23,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781776611] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:15:23,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866639] [2023-11-23 21:15:23,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:23,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:23,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:23,771 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:15:23,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:15:24,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:24,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:15:24,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:15:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 21:15:24,078 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:15:24,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866639] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:24,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:15:24,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 21:15:24,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343255457] [2023-11-23 21:15:24,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:24,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:15:24,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:24,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:15:24,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:15:24,082 INFO L87 Difference]: Start difference. First operand 2155 states and 4009 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:15:24,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:24,653 INFO L93 Difference]: Finished difference Result 3160 states and 5492 transitions. [2023-11-23 21:15:24,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:15:24,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2023-11-23 21:15:24,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:24,673 INFO L225 Difference]: With dead ends: 3160 [2023-11-23 21:15:24,673 INFO L226 Difference]: Without dead ends: 2651 [2023-11-23 21:15:24,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 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 21:15:24,677 INFO L413 NwaCegarLoop]: 3222 mSDtfsCounter, 3437 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3437 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:24,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3437 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:15:24,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2023-11-23 21:15:24,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2645. [2023-11-23 21:15:24,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2463 states have (on average 1.8038976857490865) internal successors, (4443), 2469 states have internal predecessors, (4443), 132 states have call successors, (132), 48 states have call predecessors, (132), 48 states have return successors, (132), 128 states have call predecessors, (132), 132 states have call successors, (132) [2023-11-23 21:15:24,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 4707 transitions. [2023-11-23 21:15:24,797 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 4707 transitions. Word has length 102 [2023-11-23 21:15:24,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:24,799 INFO L495 AbstractCegarLoop]: Abstraction has 2645 states and 4707 transitions. [2023-11-23 21:15:24,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:15:24,799 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 4707 transitions. [2023-11-23 21:15:24,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-23 21:15:24,809 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:24,810 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:15:24,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:15:25,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:25,025 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:25,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:25,025 INFO L85 PathProgramCache]: Analyzing trace with hash 511634835, now seen corresponding path program 1 times [2023-11-23 21:15:25,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:25,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539022379] [2023-11-23 21:15:25,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:25,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:25,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:25,219 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:15:25,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:25,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539022379] [2023-11-23 21:15:25,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539022379] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:15:25,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30674127] [2023-11-23 21:15:25,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:25,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:25,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:25,229 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:15:25,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:15:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:25,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:15:25,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:15:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-23 21:15:25,458 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:15:25,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30674127] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:25,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:15:25,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 21:15:25,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534757550] [2023-11-23 21:15:25,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:25,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:15:25,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:25,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:15:25,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:15:25,461 INFO L87 Difference]: Start difference. First operand 2645 states and 4707 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:15:26,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:26,036 INFO L93 Difference]: Finished difference Result 4618 states and 7600 transitions. [2023-11-23 21:15:26,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:15:26,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2023-11-23 21:15:26,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:26,061 INFO L225 Difference]: With dead ends: 4618 [2023-11-23 21:15:26,061 INFO L226 Difference]: Without dead ends: 3619 [2023-11-23 21:15:26,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 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 21:15:26,068 INFO L413 NwaCegarLoop]: 3261 mSDtfsCounter, 3446 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3446 SdHoareTripleChecker+Valid, 3419 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:26,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3446 Valid, 3419 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:15:26,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2023-11-23 21:15:26,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 3609. [2023-11-23 21:15:26,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3609 states, 3259 states have (on average 1.708192697146364) internal successors, (5567), 3269 states have internal predecessors, (5567), 252 states have call successors, (252), 96 states have call predecessors, (252), 96 states have return successors, (252), 244 states have call predecessors, (252), 252 states have call successors, (252) [2023-11-23 21:15:26,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3609 states to 3609 states and 6071 transitions. [2023-11-23 21:15:26,233 INFO L78 Accepts]: Start accepts. Automaton has 3609 states and 6071 transitions. Word has length 102 [2023-11-23 21:15:26,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:26,233 INFO L495 AbstractCegarLoop]: Abstraction has 3609 states and 6071 transitions. [2023-11-23 21:15:26,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:15:26,234 INFO L276 IsEmpty]: Start isEmpty. Operand 3609 states and 6071 transitions. [2023-11-23 21:15:26,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-23 21:15:26,242 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:26,242 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:15:26,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:15:26,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:26,453 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:26,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:26,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1192978517, now seen corresponding path program 1 times [2023-11-23 21:15:26,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:26,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201215518] [2023-11-23 21:15:26,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:26,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:15:26,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:26,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201215518] [2023-11-23 21:15:26,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201215518] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:15:26,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964304366] [2023-11-23 21:15:26,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:26,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:26,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:26,641 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:15:26,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:15:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:26,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:15:26,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:15:26,909 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:15:26,909 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:15:26,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964304366] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:26,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:15:26,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 21:15:26,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014115263] [2023-11-23 21:15:26,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:26,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:15:26,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:26,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:15:26,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:15:26,916 INFO L87 Difference]: Start difference. First operand 3609 states and 6071 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:15:27,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:27,528 INFO L93 Difference]: Finished difference Result 7486 states and 11716 transitions. [2023-11-23 21:15:27,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:15:27,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2023-11-23 21:15:27,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:27,570 INFO L225 Difference]: With dead ends: 7486 [2023-11-23 21:15:27,571 INFO L226 Difference]: Without dead ends: 5523 [2023-11-23 21:15:27,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 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 21:15:27,796 INFO L413 NwaCegarLoop]: 3222 mSDtfsCounter, 3431 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3431 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:27,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3431 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:15:27,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5523 states. [2023-11-23 21:15:27,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5523 to 5505. [2023-11-23 21:15:27,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5505 states, 4827 states have (on average 1.6090739589807335) internal successors, (7767), 4845 states have internal predecessors, (7767), 484 states have call successors, (484), 192 states have call predecessors, (484), 192 states have return successors, (484), 468 states have call predecessors, (484), 484 states have call successors, (484) [2023-11-23 21:15:28,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5505 states to 5505 states and 8735 transitions. [2023-11-23 21:15:28,023 INFO L78 Accepts]: Start accepts. Automaton has 5505 states and 8735 transitions. Word has length 102 [2023-11-23 21:15:28,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:28,023 INFO L495 AbstractCegarLoop]: Abstraction has 5505 states and 8735 transitions. [2023-11-23 21:15:28,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:15:28,024 INFO L276 IsEmpty]: Start isEmpty. Operand 5505 states and 8735 transitions. [2023-11-23 21:15:28,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-23 21:15:28,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:28,032 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:15:28,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:15:28,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:28,249 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:28,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:28,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1791295955, now seen corresponding path program 1 times [2023-11-23 21:15:28,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:28,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158465058] [2023-11-23 21:15:28,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:28,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:28,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-23 21:15:28,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:28,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158465058] [2023-11-23 21:15:28,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158465058] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:28,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:15:28,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:15:28,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606867591] [2023-11-23 21:15:28,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:28,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:15:28,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:28,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:15:28,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:15:28,380 INFO L87 Difference]: Start difference. First operand 5505 states and 8735 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:15:29,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:29,091 INFO L93 Difference]: Finished difference Result 8563 states and 13184 transitions. [2023-11-23 21:15:29,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:15:29,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 102 [2023-11-23 21:15:29,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:29,151 INFO L225 Difference]: With dead ends: 8563 [2023-11-23 21:15:29,152 INFO L226 Difference]: Without dead ends: 6593 [2023-11-23 21:15:29,160 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 21:15:29,168 INFO L413 NwaCegarLoop]: 3316 mSDtfsCounter, 89 mSDsluCounter, 3230 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 6546 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:29,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 6546 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:15:29,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6593 states. [2023-11-23 21:15:29,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6593 to 6273. [2023-11-23 21:15:29,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6273 states, 5563 states have (on average 1.6061477619989215) internal successors, (8935), 5581 states have internal predecessors, (8935), 500 states have call successors, (500), 208 states have call predecessors, (500), 208 states have return successors, (500), 484 states have call predecessors, (500), 500 states have call successors, (500) [2023-11-23 21:15:29,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6273 states to 6273 states and 9935 transitions. [2023-11-23 21:15:29,481 INFO L78 Accepts]: Start accepts. Automaton has 6273 states and 9935 transitions. Word has length 102 [2023-11-23 21:15:29,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:29,483 INFO L495 AbstractCegarLoop]: Abstraction has 6273 states and 9935 transitions. [2023-11-23 21:15:29,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:15:29,484 INFO L276 IsEmpty]: Start isEmpty. Operand 6273 states and 9935 transitions. [2023-11-23 21:15:29,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-23 21:15:29,499 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:29,500 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:15:29,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:15:29,500 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:29,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:29,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1032749465, now seen corresponding path program 1 times [2023-11-23 21:15:29,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:29,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810486448] [2023-11-23 21:15:29,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:29,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-23 21:15:29,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:29,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810486448] [2023-11-23 21:15:29,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810486448] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:29,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:15:29,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:15:29,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112111606] [2023-11-23 21:15:29,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:29,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:15:29,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:29,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:15:29,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:15:29,614 INFO L87 Difference]: Start difference. First operand 6273 states and 9935 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 21:15:30,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:30,343 INFO L93 Difference]: Finished difference Result 15382 states and 23252 transitions. [2023-11-23 21:15:30,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:15:30,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 138 [2023-11-23 21:15:30,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:30,400 INFO L225 Difference]: With dead ends: 15382 [2023-11-23 21:15:30,400 INFO L226 Difference]: Without dead ends: 10755 [2023-11-23 21:15:30,418 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 21:15:30,419 INFO L413 NwaCegarLoop]: 3224 mSDtfsCounter, 3434 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3434 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:30,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3434 Valid, 3382 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:15:30,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10755 states. [2023-11-23 21:15:30,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10755 to 10705. [2023-11-23 21:15:30,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10705 states, 9323 states have (on average 1.5315885444599378) internal successors, (14279), 9357 states have internal predecessors, (14279), 964 states have call successors, (964), 416 states have call predecessors, (964), 416 states have return successors, (964), 932 states have call predecessors, (964), 964 states have call successors, (964) [2023-11-23 21:15:31,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10705 states to 10705 states and 16207 transitions. [2023-11-23 21:15:31,077 INFO L78 Accepts]: Start accepts. Automaton has 10705 states and 16207 transitions. Word has length 138 [2023-11-23 21:15:31,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:31,078 INFO L495 AbstractCegarLoop]: Abstraction has 10705 states and 16207 transitions. [2023-11-23 21:15:31,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 21:15:31,078 INFO L276 IsEmpty]: Start isEmpty. Operand 10705 states and 16207 transitions. [2023-11-23 21:15:31,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-23 21:15:31,110 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:31,113 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:15:31,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:15:31,114 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:31,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:31,115 INFO L85 PathProgramCache]: Analyzing trace with hash 237872081, now seen corresponding path program 1 times [2023-11-23 21:15:31,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:31,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177890788] [2023-11-23 21:15:31,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:31,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:31,261 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-23 21:15:31,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:31,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177890788] [2023-11-23 21:15:31,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177890788] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:31,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:15:31,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:15:31,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796980912] [2023-11-23 21:15:31,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:31,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:15:31,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:31,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:15:31,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:15:31,264 INFO L87 Difference]: Start difference. First operand 10705 states and 16207 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 21:15:32,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:32,542 INFO L93 Difference]: Finished difference Result 28534 states and 42036 transitions. [2023-11-23 21:15:32,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:15:32,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 138 [2023-11-23 21:15:32,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:32,628 INFO L225 Difference]: With dead ends: 28534 [2023-11-23 21:15:32,628 INFO L226 Difference]: Without dead ends: 19475 [2023-11-23 21:15:32,667 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 21:15:32,668 INFO L413 NwaCegarLoop]: 3224 mSDtfsCounter, 3436 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3436 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:32,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3436 Valid, 3382 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:15:32,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19475 states. [2023-11-23 21:15:33,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19475 to 19377. [2023-11-23 21:15:33,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19377 states, 16683 states have (on average 1.4773721752682372) internal successors, (24647), 16749 states have internal predecessors, (24647), 1860 states have call successors, (1860), 832 states have call predecessors, (1860), 832 states have return successors, (1860), 1796 states have call predecessors, (1860), 1860 states have call successors, (1860) [2023-11-23 21:15:33,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19377 states to 19377 states and 28367 transitions. [2023-11-23 21:15:33,822 INFO L78 Accepts]: Start accepts. Automaton has 19377 states and 28367 transitions. Word has length 138 [2023-11-23 21:15:33,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:33,823 INFO L495 AbstractCegarLoop]: Abstraction has 19377 states and 28367 transitions. [2023-11-23 21:15:33,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 21:15:33,823 INFO L276 IsEmpty]: Start isEmpty. Operand 19377 states and 28367 transitions. [2023-11-23 21:15:33,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-23 21:15:33,895 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:33,895 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:15:33,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:15:33,896 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:33,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:33,897 INFO L85 PathProgramCache]: Analyzing trace with hash 2015782051, now seen corresponding path program 1 times [2023-11-23 21:15:33,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:33,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235203454] [2023-11-23 21:15:33,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:33,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:33,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:34,051 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-23 21:15:34,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:34,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235203454] [2023-11-23 21:15:34,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235203454] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:34,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:15:34,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:15:34,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002350187] [2023-11-23 21:15:34,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:34,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:15:34,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:34,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:15:34,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:15:34,055 INFO L87 Difference]: Start difference. First operand 19377 states and 28367 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 21:15:36,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:36,331 INFO L93 Difference]: Finished difference Result 54262 states and 78420 transitions. [2023-11-23 21:15:36,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:15:36,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 138 [2023-11-23 21:15:36,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:36,517 INFO L225 Difference]: With dead ends: 54262 [2023-11-23 21:15:36,517 INFO L226 Difference]: Without dead ends: 36531 [2023-11-23 21:15:36,576 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 21:15:36,578 INFO L413 NwaCegarLoop]: 3232 mSDtfsCounter, 3439 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3439 SdHoareTripleChecker+Valid, 3390 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:36,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3439 Valid, 3390 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:15:36,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36531 states. [2023-11-23 21:15:38,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36531 to 36337. [2023-11-23 21:15:38,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36337 states, 31083 states have (on average 1.439468519769649) internal successors, (44743), 31213 states have internal predecessors, (44743), 3588 states have call successors, (3588), 1664 states have call predecessors, (3588), 1664 states have return successors, (3588), 3460 states have call predecessors, (3588), 3588 states have call successors, (3588) [2023-11-23 21:15:38,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36337 states to 36337 states and 51919 transitions. [2023-11-23 21:15:38,245 INFO L78 Accepts]: Start accepts. Automaton has 36337 states and 51919 transitions. Word has length 138 [2023-11-23 21:15:38,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:38,246 INFO L495 AbstractCegarLoop]: Abstraction has 36337 states and 51919 transitions. [2023-11-23 21:15:38,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 21:15:38,246 INFO L276 IsEmpty]: Start isEmpty. Operand 36337 states and 51919 transitions. [2023-11-23 21:15:38,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-23 21:15:38,376 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:38,376 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2023-11-23 21:15:38,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 21:15:38,376 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:38,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:38,377 INFO L85 PathProgramCache]: Analyzing trace with hash -225324292, now seen corresponding path program 1 times [2023-11-23 21:15:38,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:38,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887328545] [2023-11-23 21:15:38,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:38,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:38,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 12 proven. 50 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-23 21:15:39,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:39,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887328545] [2023-11-23 21:15:39,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887328545] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:15:39,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752379860] [2023-11-23 21:15:39,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:39,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:39,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:39,403 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:15:39,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577694b1-ef52-4fd6-88c0-3dcd2c448490/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:15:39,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:39,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 1008 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-23 21:15:39,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:15:40,222 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 72 proven. 32 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 21:15:40,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:15:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 59 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-23 21:15:40,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752379860] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:15:40,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1418404865] [2023-11-23 21:15:40,934 INFO L159 IcfgInterpreter]: Started Sifa with 82 locations of interest [2023-11-23 21:15:40,934 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:15:40,938 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:15:40,943 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:15:40,944 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs