./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh --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 6d55d399b7f413c968459e57be858565c9c3a03797404fd2613513b79af9aeb3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:12:08,870 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:12:08,936 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 17:12:08,941 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:12:08,942 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:12:08,969 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:12:08,970 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:12:08,970 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:12:08,971 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:12:08,972 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:12:08,972 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:12:08,973 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:12:08,973 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:12:08,974 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:12:08,974 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:12:08,974 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:12:08,975 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:12:08,975 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:12:08,976 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:12:08,976 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:12:08,977 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:12:08,977 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:12:08,978 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:12:08,979 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:12:08,979 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 17:12:08,980 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:12:08,980 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 17:12:08,981 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:12:08,981 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:12:08,982 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:12:08,982 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:12:08,983 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 17:12:08,983 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:12:08,984 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:12:08,984 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:12:08,984 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:12:08,985 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:12:08,985 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:12:08,986 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:12:08,986 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:12:08,986 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:12:08,987 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:12:08,987 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:12:08,987 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:12:08,987 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:12:08,987 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:12:08,987 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:12:08,988 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_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d55d399b7f413c968459e57be858565c9c3a03797404fd2613513b79af9aeb3 [2023-12-02 17:12:09,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:12:09,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:12:09,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:12:09,244 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:12:09,245 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:12:09,246 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-1.c [2023-12-02 17:12:11,992 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:12:12,200 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:12:12,200 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-1.c [2023-12-02 17:12:12,215 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/data/f21a08e23/2bb0311cece94781a34f15deeb430c25/FLAG755d80062 [2023-12-02 17:12:12,228 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/data/f21a08e23/2bb0311cece94781a34f15deeb430c25 [2023-12-02 17:12:12,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:12:12,232 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:12:12,234 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:12:12,234 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:12:12,239 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:12:12,240 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:12:12" (1/1) ... [2023-12-02 17:12:12,241 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36e374fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:12:12, skipping insertion in model container [2023-12-02 17:12:12,241 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:12:12" (1/1) ... [2023-12-02 17:12:12,305 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:12:12,432 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-1.c[913,926] [2023-12-02 17:12:12,474 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_804c4573-0b12-42b9-8b28-4c5c408eaf21/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-1.c[5977,5990] [2023-12-02 17:12:12,561 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:12:12,576 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:12:12,585 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_804c4573-0b12-42b9-8b28-4c5c408eaf21/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-1.c[913,926] [2023-12-02 17:12:12,603 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_804c4573-0b12-42b9-8b28-4c5c408eaf21/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-1.c[5977,5990] [2023-12-02 17:12:12,657 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:12:12,682 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:12:12,682 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:12:12 WrapperNode [2023-12-02 17:12:12,682 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:12:12,683 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:12:12,683 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:12:12,684 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:12:12,689 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:12:12" (1/1) ... [2023-12-02 17:12:12,706 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:12:12" (1/1) ... [2023-12-02 17:12:12,750 INFO L138 Inliner]: procedures = 66, calls = 75, calls flagged for inlining = 41, calls inlined = 41, statements flattened = 905 [2023-12-02 17:12:12,750 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:12:12,751 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:12:12,751 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:12:12,751 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:12:12,760 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:12:12" (1/1) ... [2023-12-02 17:12:12,760 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:12:12" (1/1) ... [2023-12-02 17:12:12,764 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:12:12" (1/1) ... [2023-12-02 17:12:12,764 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:12:12" (1/1) ... [2023-12-02 17:12:12,777 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:12:12" (1/1) ... [2023-12-02 17:12:12,792 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:12:12" (1/1) ... [2023-12-02 17:12:12,795 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:12:12" (1/1) ... [2023-12-02 17:12:12,799 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:12:12" (1/1) ... [2023-12-02 17:12:12,806 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:12:12,807 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:12:12,807 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:12:12,807 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:12:12,808 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:12:12" (1/1) ... [2023-12-02 17:12:12,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:12:12,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:12:12,840 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:12:12,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:12:12,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:12:12,878 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 17:12:12,879 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 17:12:12,879 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2023-12-02 17:12:12,879 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2023-12-02 17:12:12,879 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-12-02 17:12:12,879 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-12-02 17:12:12,880 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-12-02 17:12:12,880 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-12-02 17:12:12,880 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-12-02 17:12:12,880 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-12-02 17:12:12,880 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-12-02 17:12:12,881 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-12-02 17:12:12,881 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-12-02 17:12:12,881 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-12-02 17:12:12,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:12:12,881 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-12-02 17:12:12,881 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-12-02 17:12:12,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:12:12,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:12:12,882 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-12-02 17:12:12,882 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-12-02 17:12:13,019 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:12:13,021 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:12:13,803 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:12:14,159 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:12:14,159 INFO L309 CfgBuilder]: Removed 16 assume(true) statements. [2023-12-02 17:12:14,161 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:12:14 BoogieIcfgContainer [2023-12-02 17:12:14,161 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:12:14,163 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:12:14,163 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:12:14,166 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:12:14,166 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:12:12" (1/3) ... [2023-12-02 17:12:14,167 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d556670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:12:14, skipping insertion in model container [2023-12-02 17:12:14,167 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:12:12" (2/3) ... [2023-12-02 17:12:14,167 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d556670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:12:14, skipping insertion in model container [2023-12-02 17:12:14,167 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:12:14" (3/3) ... [2023-12-02 17:12:14,168 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.09.cil-1.c [2023-12-02 17:12:14,184 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:12:14,184 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 17:12:14,230 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:12:14,236 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;@5f97039a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:12:14,236 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 17:12:14,241 INFO L276 IsEmpty]: Start isEmpty. Operand has 216 states, 175 states have (on average 1.5257142857142858) internal successors, (267), 180 states have internal predecessors, (267), 29 states have call successors, (29), 9 states have call predecessors, (29), 9 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2023-12-02 17:12:14,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 17:12:14,249 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:12:14,249 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] [2023-12-02 17:12:14,250 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:12:14,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:12:14,255 INFO L85 PathProgramCache]: Analyzing trace with hash -520941215, now seen corresponding path program 1 times [2023-12-02 17:12:14,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:12:14,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373407955] [2023-12-02 17:12:14,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:12:14,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:12:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:12:14,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:12:14,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:12:14,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373407955] [2023-12-02 17:12:14,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373407955] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:12:14,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:12:14,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:12:14,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220663378] [2023-12-02 17:12:14,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:12:14,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:12:14,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:12:14,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:12:14,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:12:14,567 INFO L87 Difference]: Start difference. First operand has 216 states, 175 states have (on average 1.5257142857142858) internal successors, (267), 180 states have internal predecessors, (267), 29 states have call successors, (29), 9 states have call predecessors, (29), 9 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:12:14,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:12:14,756 INFO L93 Difference]: Finished difference Result 465 states and 698 transitions. [2023-12-02 17:12:14,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:12:14,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-12-02 17:12:14,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:12:14,771 INFO L225 Difference]: With dead ends: 465 [2023-12-02 17:12:14,772 INFO L226 Difference]: Without dead ends: 249 [2023-12-02 17:12:14,777 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 [2023-12-02 17:12:14,781 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 292 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:12:14,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 330 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:12:14,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-12-02 17:12:14,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 245. [2023-12-02 17:12:14,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 201 states have (on average 1.462686567164179) internal successors, (294), 204 states have internal predecessors, (294), 32 states have call successors, (32), 11 states have call predecessors, (32), 10 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-12-02 17:12:14,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 356 transitions. [2023-12-02 17:12:14,853 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 356 transitions. Word has length 28 [2023-12-02 17:12:14,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:12:14,854 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 356 transitions. [2023-12-02 17:12:14,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:12:14,854 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 356 transitions. [2023-12-02 17:12:14,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 17:12:14,857 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:12:14,857 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] [2023-12-02 17:12:14,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:12:14,858 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:12:14,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:12:14,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1298367761, now seen corresponding path program 1 times [2023-12-02 17:12:14,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:12:14,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444869937] [2023-12-02 17:12:14,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:12:14,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:12:14,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:12:14,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:12:14,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:12:14,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444869937] [2023-12-02 17:12:14,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444869937] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:12:14,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:12:14,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:12:14,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270502884] [2023-12-02 17:12:14,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:12:14,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:12:14,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:12:14,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:12:14,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:12:14,929 INFO L87 Difference]: Start difference. First operand 245 states and 356 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:12:15,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:12:15,047 INFO L93 Difference]: Finished difference Result 401 states and 573 transitions. [2023-12-02 17:12:15,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:12:15,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-12-02 17:12:15,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:12:15,051 INFO L225 Difference]: With dead ends: 401 [2023-12-02 17:12:15,052 INFO L226 Difference]: Without dead ends: 320 [2023-12-02 17:12:15,053 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 [2023-12-02 17:12:15,054 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 290 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:12:15,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 314 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:12:15,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2023-12-02 17:12:15,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 316. [2023-12-02 17:12:15,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 261 states have (on average 1.4367816091954022) internal successors, (375), 264 states have internal predecessors, (375), 39 states have call successors, (39), 15 states have call predecessors, (39), 14 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2023-12-02 17:12:15,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 451 transitions. [2023-12-02 17:12:15,086 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 451 transitions. Word has length 29 [2023-12-02 17:12:15,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:12:15,086 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 451 transitions. [2023-12-02 17:12:15,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:12:15,087 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 451 transitions. [2023-12-02 17:12:15,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 17:12:15,089 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:12:15,089 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] [2023-12-02 17:12:15,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 17:12:15,090 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:12:15,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:12:15,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1483748310, now seen corresponding path program 1 times [2023-12-02 17:12:15,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:12:15,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010268877] [2023-12-02 17:12:15,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:12:15,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:12:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:12:15,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:12:15,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:12:15,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010268877] [2023-12-02 17:12:15,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010268877] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:12:15,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:12:15,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:12:15,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304586888] [2023-12-02 17:12:15,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:12:15,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:12:15,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:12:15,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:12:15,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:12:15,142 INFO L87 Difference]: Start difference. First operand 316 states and 451 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:12:15,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:12:15,281 INFO L93 Difference]: Finished difference Result 556 states and 779 transitions. [2023-12-02 17:12:15,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:12:15,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2023-12-02 17:12:15,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:12:15,285 INFO L225 Difference]: With dead ends: 556 [2023-12-02 17:12:15,286 INFO L226 Difference]: Without dead ends: 404 [2023-12-02 17:12:15,287 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 [2023-12-02 17:12:15,288 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 46 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:12:15,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 519 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:12:15,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2023-12-02 17:12:15,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 390. [2023-12-02 17:12:15,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 324 states have (on average 1.4197530864197532) internal successors, (460), 329 states have internal predecessors, (460), 45 states have call successors, (45), 20 states have call predecessors, (45), 19 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2023-12-02 17:12:15,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 548 transitions. [2023-12-02 17:12:15,319 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 548 transitions. Word has length 30 [2023-12-02 17:12:15,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:12:15,319 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 548 transitions. [2023-12-02 17:12:15,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:12:15,320 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 548 transitions. [2023-12-02 17:12:15,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 17:12:15,322 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:12:15,322 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 17:12:15,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 17:12:15,323 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:12:15,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:12:15,323 INFO L85 PathProgramCache]: Analyzing trace with hash 458261836, now seen corresponding path program 1 times [2023-12-02 17:12:15,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:12:15,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111811791] [2023-12-02 17:12:15,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:12:15,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:12:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:12:15,415 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:12:15,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:12:15,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111811791] [2023-12-02 17:12:15,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111811791] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:12:15,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:12:15,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:12:15,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714081790] [2023-12-02 17:12:15,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:12:15,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:12:15,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:12:15,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:12:15,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:12:15,418 INFO L87 Difference]: Start difference. First operand 390 states and 548 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 17:12:15,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:12:15,549 INFO L93 Difference]: Finished difference Result 553 states and 766 transitions. [2023-12-02 17:12:15,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:12:15,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2023-12-02 17:12:15,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:12:15,554 INFO L225 Difference]: With dead ends: 553 [2023-12-02 17:12:15,554 INFO L226 Difference]: Without dead ends: 395 [2023-12-02 17:12:15,555 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 [2023-12-02 17:12:15,556 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 32 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:12:15,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 553 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:12:15,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2023-12-02 17:12:15,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 384. [2023-12-02 17:12:15,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 318 states have (on average 1.4025157232704402) internal successors, (446), 323 states have internal predecessors, (446), 45 states have call successors, (45), 20 states have call predecessors, (45), 19 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2023-12-02 17:12:15,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 534 transitions. [2023-12-02 17:12:15,582 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 534 transitions. Word has length 43 [2023-12-02 17:12:15,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:12:15,582 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 534 transitions. [2023-12-02 17:12:15,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 17:12:15,583 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 534 transitions. [2023-12-02 17:12:15,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 17:12:15,584 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:12:15,585 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 17:12:15,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 17:12:15,585 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:12:15,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:12:15,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1168074753, now seen corresponding path program 1 times [2023-12-02 17:12:15,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:12:15,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733436043] [2023-12-02 17:12:15,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:12:15,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:12:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:12:15,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:12:15,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:12:15,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733436043] [2023-12-02 17:12:15,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733436043] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:12:15,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:12:15,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:12:15,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547109797] [2023-12-02 17:12:15,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:12:15,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:12:15,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:12:15,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:12:15,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:12:15,635 INFO L87 Difference]: Start difference. First operand 384 states and 534 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 17:12:15,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:12:15,753 INFO L93 Difference]: Finished difference Result 633 states and 858 transitions. [2023-12-02 17:12:15,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:12:15,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2023-12-02 17:12:15,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:12:15,757 INFO L225 Difference]: With dead ends: 633 [2023-12-02 17:12:15,758 INFO L226 Difference]: Without dead ends: 430 [2023-12-02 17:12:15,759 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 [2023-12-02 17:12:15,760 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 276 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:12:15,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 313 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:12:15,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2023-12-02 17:12:15,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 430. [2023-12-02 17:12:15,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 357 states have (on average 1.3697478991596639) internal successors, (489), 362 states have internal predecessors, (489), 49 states have call successors, (49), 23 states have call predecessors, (49), 22 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2023-12-02 17:12:15,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 585 transitions. [2023-12-02 17:12:15,789 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 585 transitions. Word has length 46 [2023-12-02 17:12:15,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:12:15,790 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 585 transitions. [2023-12-02 17:12:15,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 17:12:15,790 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 585 transitions. [2023-12-02 17:12:15,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 17:12:15,792 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:12:15,792 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:12:15,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 17:12:15,792 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:12:15,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:12:15,793 INFO L85 PathProgramCache]: Analyzing trace with hash 544686319, now seen corresponding path program 1 times [2023-12-02 17:12:15,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:12:15,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955680864] [2023-12-02 17:12:15,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:12:15,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:12:15,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:12:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 17:12:15,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:12:15,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955680864] [2023-12-02 17:12:15,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955680864] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:12:15,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:12:15,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:12:15,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996241694] [2023-12-02 17:12:15,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:12:15,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:12:15,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:12:15,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:12:15,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:12:15,888 INFO L87 Difference]: Start difference. First operand 430 states and 585 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 17:12:16,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:12:16,159 INFO L93 Difference]: Finished difference Result 470 states and 632 transitions. [2023-12-02 17:12:16,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:12:16,160 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2023-12-02 17:12:16,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:12:16,165 INFO L225 Difference]: With dead ends: 470 [2023-12-02 17:12:16,165 INFO L226 Difference]: Without dead ends: 467 [2023-12-02 17:12:16,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:12:16,166 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 508 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:12:16,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 312 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:12:16,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2023-12-02 17:12:16,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 429. [2023-12-02 17:12:16,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 357 states have (on average 1.3641456582633054) internal successors, (487), 361 states have internal predecessors, (487), 48 states have call successors, (48), 23 states have call predecessors, (48), 22 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2023-12-02 17:12:16,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 582 transitions. [2023-12-02 17:12:16,205 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 582 transitions. Word has length 47 [2023-12-02 17:12:16,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:12:16,205 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 582 transitions. [2023-12-02 17:12:16,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 17:12:16,205 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 582 transitions. [2023-12-02 17:12:16,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-02 17:12:16,206 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:12:16,206 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 17:12:16,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 17:12:16,207 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:12:16,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:12:16,207 INFO L85 PathProgramCache]: Analyzing trace with hash -295775932, now seen corresponding path program 1 times [2023-12-02 17:12:16,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:12:16,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987808407] [2023-12-02 17:12:16,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:12:16,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:12:16,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:12:16,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 17:12:16,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:12:16,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987808407] [2023-12-02 17:12:16,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987808407] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:12:16,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055162506] [2023-12-02 17:12:16,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:12:16,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:12:16,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:12:16,335 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:12:16,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:12:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:12:16,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:12:16,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:12:16,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:12:16,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:12:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 17:12:16,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055162506] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:12:16,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1260019528] [2023-12-02 17:12:16,799 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2023-12-02 17:12:16,799 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:12:16,803 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:12:16,807 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:12:16,807 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:12:23,465 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 151 for LOIs [2023-12-02 17:12:23,513 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 176 for LOIs [2023-12-02 17:12:23,589 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 176 for LOIs [2023-12-02 17:12:24,624 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:12:42,525 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7161#(and (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (<= 1 |#StackHeapBarrier|) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~q_buf_0~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (not (= ~p_num_write~0 1)) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= ~p_last_write~0 0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (= ~c_last_read~0 0) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (<= ~p_num_write~0 1) (= ~m_i~0 0) (= 0 ~t9_pc~0) (= ~p_dw_pc~0 1) (= ~q_write_ev~0 2) (= ~E_2~0 2) (= ~p_dw_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= ~q_read_ev~0 2) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~p_dw_i~0 1) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~1#1_BEFORE_CALL_4| Int)) (and (<= |v_ULTIMATE.start_eval1_~tmp___0~1#1_BEFORE_CALL_4| 2147483647) (<= 0 (+ 2147483648 |v_ULTIMATE.start_eval1_~tmp___0~1#1_BEFORE_CALL_4|)) (not (= 0 |v_ULTIMATE.start_eval1_~tmp___0~1#1_BEFORE_CALL_4|)))) (= 0 ~t2_pc~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (= ~E_9~0 2) (= ~t1_i~0 0))' at error location [2023-12-02 17:12:42,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:12:42,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:12:42,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-12-02 17:12:42,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740319265] [2023-12-02 17:12:42,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:12:42,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 17:12:42,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:12:42,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 17:12:42,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 17:12:42,528 INFO L87 Difference]: Start difference. First operand 429 states and 582 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 17:12:42,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:12:42,917 INFO L93 Difference]: Finished difference Result 872 states and 1150 transitions. [2023-12-02 17:12:42,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 17:12:42,918 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2023-12-02 17:12:42,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:12:42,924 INFO L225 Difference]: With dead ends: 872 [2023-12-02 17:12:42,924 INFO L226 Difference]: Without dead ends: 869 [2023-12-02 17:12:42,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 17:12:42,926 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 606 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:12:42,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 1152 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:12:42,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2023-12-02 17:12:42,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 638. [2023-12-02 17:12:42,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 534 states have (on average 1.348314606741573) internal successors, (720), 540 states have internal predecessors, (720), 67 states have call successors, (67), 36 states have call predecessors, (67), 35 states have return successors, (66), 62 states have call predecessors, (66), 66 states have call successors, (66) [2023-12-02 17:12:42,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 853 transitions. [2023-12-02 17:12:42,978 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 853 transitions. Word has length 48 [2023-12-02 17:12:42,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:12:42,978 INFO L495 AbstractCegarLoop]: Abstraction has 638 states and 853 transitions. [2023-12-02 17:12:42,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 17:12:42,979 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 853 transitions. [2023-12-02 17:12:42,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-02 17:12:42,980 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:12:42,980 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:12:42,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 17:12:43,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:12:43,184 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:12:43,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:12:43,184 INFO L85 PathProgramCache]: Analyzing trace with hash -102449853, now seen corresponding path program 1 times [2023-12-02 17:12:43,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:12:43,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732942034] [2023-12-02 17:12:43,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:12:43,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:12:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:12:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:12:43,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:12:43,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732942034] [2023-12-02 17:12:43,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732942034] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:12:43,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:12:43,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 17:12:43,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617844961] [2023-12-02 17:12:43,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:12:43,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:12:43,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:12:43,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:12:43,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:12:43,321 INFO L87 Difference]: Start difference. First operand 638 states and 853 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 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) [2023-12-02 17:12:44,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:12:44,038 INFO L93 Difference]: Finished difference Result 1401 states and 2071 transitions. [2023-12-02 17:12:44,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:12:44,039 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 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 58 [2023-12-02 17:12:44,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:12:44,047 INFO L225 Difference]: With dead ends: 1401 [2023-12-02 17:12:44,047 INFO L226 Difference]: Without dead ends: 1243 [2023-12-02 17:12:44,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:12:44,050 INFO L413 NwaCegarLoop]: 432 mSDtfsCounter, 1205 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:12:44,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1205 Valid, 1130 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 17:12:44,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2023-12-02 17:12:44,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 1232. [2023-12-02 17:12:44,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1031 states have (on average 1.4064015518913675) internal successors, (1450), 1040 states have internal predecessors, (1450), 140 states have call successors, (140), 60 states have call predecessors, (140), 59 states have return successors, (189), 132 states have call predecessors, (189), 139 states have call successors, (189) [2023-12-02 17:12:44,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 1779 transitions. [2023-12-02 17:12:44,118 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 1779 transitions. Word has length 58 [2023-12-02 17:12:44,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:12:44,119 INFO L495 AbstractCegarLoop]: Abstraction has 1232 states and 1779 transitions. [2023-12-02 17:12:44,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 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) [2023-12-02 17:12:44,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 1779 transitions. [2023-12-02 17:12:44,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-02 17:12:44,120 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:12:44,121 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2023-12-02 17:12:44,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 17:12:44,121 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:12:44,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:12:44,121 INFO L85 PathProgramCache]: Analyzing trace with hash 464012660, now seen corresponding path program 2 times [2023-12-02 17:12:44,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:12:44,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871000537] [2023-12-02 17:12:44,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:12:44,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:12:44,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:12:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:12:44,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:12:44,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871000537] [2023-12-02 17:12:44,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871000537] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:12:44,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:12:44,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:12:44,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461039784] [2023-12-02 17:12:44,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:12:44,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:12:44,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:12:44,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:12:44,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:12:44,164 INFO L87 Difference]: Start difference. First operand 1232 states and 1779 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 17:12:44,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:12:44,315 INFO L93 Difference]: Finished difference Result 1562 states and 2212 transitions. [2023-12-02 17:12:44,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:12:44,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 61 [2023-12-02 17:12:44,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:12:44,321 INFO L225 Difference]: With dead ends: 1562 [2023-12-02 17:12:44,321 INFO L226 Difference]: Without dead ends: 1174 [2023-12-02 17:12:44,323 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 [2023-12-02 17:12:44,323 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 289 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:12:44,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 329 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:12:44,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2023-12-02 17:12:44,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 1165. [2023-12-02 17:12:44,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 974 states have (on average 1.4055441478439425) internal successors, (1369), 984 states have internal predecessors, (1369), 134 states have call successors, (134), 56 states have call predecessors, (134), 55 states have return successors, (183), 125 states have call predecessors, (183), 133 states have call successors, (183) [2023-12-02 17:12:44,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 1686 transitions. [2023-12-02 17:12:44,385 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 1686 transitions. Word has length 61 [2023-12-02 17:12:44,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:12:44,386 INFO L495 AbstractCegarLoop]: Abstraction has 1165 states and 1686 transitions. [2023-12-02 17:12:44,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 17:12:44,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 1686 transitions. [2023-12-02 17:12:44,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 17:12:44,388 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:12:44,388 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:12:44,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 17:12:44,388 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:12:44,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:12:44,388 INFO L85 PathProgramCache]: Analyzing trace with hash -2016120738, now seen corresponding path program 1 times [2023-12-02 17:12:44,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:12:44,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743029297] [2023-12-02 17:12:44,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:12:44,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:12:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:12:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 17:12:44,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:12:44,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743029297] [2023-12-02 17:12:44,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743029297] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:12:44,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696373983] [2023-12-02 17:12:44,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:12:44,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:12:44,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:12:44,504 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:12:44,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 17:12:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:12:44,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:12:44,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:12:44,654 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 17:12:44,655 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:12:44,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696373983] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:12:44,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:12:44,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 17:12:44,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753081949] [2023-12-02 17:12:44,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:12:44,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:12:44,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:12:44,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:12:44,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:12:44,657 INFO L87 Difference]: Start difference. First operand 1165 states and 1686 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 17:12:44,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:12:44,810 INFO L93 Difference]: Finished difference Result 1292 states and 1845 transitions. [2023-12-02 17:12:44,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:12:44,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 73 [2023-12-02 17:12:44,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:12:44,816 INFO L225 Difference]: With dead ends: 1292 [2023-12-02 17:12:44,816 INFO L226 Difference]: Without dead ends: 758 [2023-12-02 17:12:44,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:12:44,818 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 25 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:12:44,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 524 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:12:44,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2023-12-02 17:12:44,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 758. [2023-12-02 17:12:44,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 631 states have (on average 1.4690966719492868) internal successors, (927), 635 states have internal predecessors, (927), 96 states have call successors, (96), 30 states have call predecessors, (96), 30 states have return successors, (146), 93 states have call predecessors, (146), 96 states have call successors, (146) [2023-12-02 17:12:44,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 1169 transitions. [2023-12-02 17:12:44,879 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 1169 transitions. Word has length 73 [2023-12-02 17:12:44,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:12:44,879 INFO L495 AbstractCegarLoop]: Abstraction has 758 states and 1169 transitions. [2023-12-02 17:12:44,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 17:12:44,880 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 1169 transitions. [2023-12-02 17:12:44,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-02 17:12:44,882 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:12:44,882 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:12:44,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 17:12:45,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:12:45,085 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:12:45,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:12:45,085 INFO L85 PathProgramCache]: Analyzing trace with hash 476546732, now seen corresponding path program 1 times [2023-12-02 17:12:45,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:12:45,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941221724] [2023-12-02 17:12:45,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:12:45,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:12:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:12:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 17:12:45,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:12:45,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941221724] [2023-12-02 17:12:45,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941221724] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:12:45,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513265135] [2023-12-02 17:12:45,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:12:45,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:12:45,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:12:45,239 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:12:45,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 17:12:45,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:12:45,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:12:45,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:12:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 17:12:45,502 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:12:45,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513265135] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:12:45,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:12:45,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 17:12:45,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945948189] [2023-12-02 17:12:45,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:12:45,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:12:45,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:12:45,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:12:45,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:12:45,505 INFO L87 Difference]: Start difference. First operand 758 states and 1169 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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) [2023-12-02 17:12:45,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:12:45,725 INFO L93 Difference]: Finished difference Result 2246 states and 3562 transitions. [2023-12-02 17:12:45,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:12:45,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 116 [2023-12-02 17:12:45,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:12:45,736 INFO L225 Difference]: With dead ends: 2246 [2023-12-02 17:12:45,736 INFO L226 Difference]: Without dead ends: 1494 [2023-12-02 17:12:45,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:12:45,741 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 209 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:12:45,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 396 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:12:45,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2023-12-02 17:12:45,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1487. [2023-12-02 17:12:45,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1243 states have (on average 1.4641995172968625) internal successors, (1820), 1250 states have internal predecessors, (1820), 183 states have call successors, (183), 60 states have call predecessors, (183), 60 states have return successors, (279), 177 states have call predecessors, (279), 183 states have call successors, (279) [2023-12-02 17:12:45,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 2282 transitions. [2023-12-02 17:12:45,863 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 2282 transitions. Word has length 116 [2023-12-02 17:12:45,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:12:45,864 INFO L495 AbstractCegarLoop]: Abstraction has 1487 states and 2282 transitions. [2023-12-02 17:12:45,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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) [2023-12-02 17:12:45,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 2282 transitions. [2023-12-02 17:12:45,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-02 17:12:45,868 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:12:45,868 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:12:45,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 17:12:46,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:12:46,069 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:12:46,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:12:46,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1716414358, now seen corresponding path program 1 times [2023-12-02 17:12:46,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:12:46,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899873522] [2023-12-02 17:12:46,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:12:46,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:12:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:12:46,189 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 17:12:46,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:12:46,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899873522] [2023-12-02 17:12:46,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899873522] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:12:46,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296380805] [2023-12-02 17:12:46,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:12:46,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:12:46,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:12:46,190 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:12:46,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 17:12:46,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:12:46,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:12:46,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:12:46,432 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:12:46,432 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:12:46,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296380805] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:12:46,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:12:46,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 17:12:46,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937337203] [2023-12-02 17:12:46,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:12:46,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:12:46,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:12:46,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:12:46,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:12:46,435 INFO L87 Difference]: Start difference. First operand 1487 states and 2282 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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) [2023-12-02 17:12:46,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:12:46,692 INFO L93 Difference]: Finished difference Result 4418 states and 6966 transitions. [2023-12-02 17:12:46,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:12:46,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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 116 [2023-12-02 17:12:46,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:12:46,712 INFO L225 Difference]: With dead ends: 4418 [2023-12-02 17:12:46,712 INFO L226 Difference]: Without dead ends: 2937 [2023-12-02 17:12:46,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:12:46,720 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 215 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:12:46,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 391 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:12:46,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2937 states. [2023-12-02 17:12:46,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2937 to 2925. [2023-12-02 17:12:46,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2925 states, 2452 states have (on average 1.4584013050570963) internal successors, (3576), 2465 states have internal predecessors, (3576), 352 states have call successors, (352), 120 states have call predecessors, (352), 120 states have return successors, (536), 340 states have call predecessors, (536), 352 states have call successors, (536) [2023-12-02 17:12:46,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2925 states to 2925 states and 4464 transitions. [2023-12-02 17:12:46,894 INFO L78 Accepts]: Start accepts. Automaton has 2925 states and 4464 transitions. Word has length 116 [2023-12-02 17:12:46,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:12:46,895 INFO L495 AbstractCegarLoop]: Abstraction has 2925 states and 4464 transitions. [2023-12-02 17:12:46,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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) [2023-12-02 17:12:46,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2925 states and 4464 transitions. [2023-12-02 17:12:46,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-02 17:12:46,899 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:12:46,899 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:12:46,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 17:12:47,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 17:12:47,100 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:12:47,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:12:47,100 INFO L85 PathProgramCache]: Analyzing trace with hash 72016808, now seen corresponding path program 1 times [2023-12-02 17:12:47,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:12:47,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259030188] [2023-12-02 17:12:47,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:12:47,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:12:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:12:47,201 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 17:12:47,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:12:47,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259030188] [2023-12-02 17:12:47,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259030188] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:12:47,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994698311] [2023-12-02 17:12:47,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:12:47,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:12:47,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:12:47,203 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:12:47,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 17:12:47,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:12:47,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:12:47,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:12:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:12:47,439 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:12:47,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994698311] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:12:47,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:12:47,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 17:12:47,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090579352] [2023-12-02 17:12:47,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:12:47,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:12:47,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:12:47,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:12:47,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:12:47,441 INFO L87 Difference]: Start difference. First operand 2925 states and 4464 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 17:12:47,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:12:47,806 INFO L93 Difference]: Finished difference Result 8702 states and 13633 transitions. [2023-12-02 17:12:47,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:12:47,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2023-12-02 17:12:47,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:12:47,844 INFO L225 Difference]: With dead ends: 8702 [2023-12-02 17:12:47,844 INFO L226 Difference]: Without dead ends: 5783 [2023-12-02 17:12:47,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:12:47,857 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 206 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:12:47,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 391 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:12:47,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5783 states. [2023-12-02 17:12:48,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5783 to 5761. [2023-12-02 17:12:48,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5761 states, 4840 states have (on average 1.4520661157024792) internal successors, (7028), 4865 states have internal predecessors, (7028), 680 states have call successors, (680), 240 states have call predecessors, (680), 240 states have return successors, (1032), 656 states have call predecessors, (1032), 680 states have call successors, (1032) [2023-12-02 17:12:48,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5761 states to 5761 states and 8740 transitions. [2023-12-02 17:12:48,278 INFO L78 Accepts]: Start accepts. Automaton has 5761 states and 8740 transitions. Word has length 116 [2023-12-02 17:12:48,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:12:48,278 INFO L495 AbstractCegarLoop]: Abstraction has 5761 states and 8740 transitions. [2023-12-02 17:12:48,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 17:12:48,279 INFO L276 IsEmpty]: Start isEmpty. Operand 5761 states and 8740 transitions. [2023-12-02 17:12:48,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-02 17:12:48,289 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:12:48,289 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:12:48,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 17:12:48,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 17:12:48,491 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:12:48,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:12:48,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1924815530, now seen corresponding path program 1 times [2023-12-02 17:12:48,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:12:48,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351466260] [2023-12-02 17:12:48,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:12:48,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:12:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:12:48,623 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 17:12:48,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:12:48,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351466260] [2023-12-02 17:12:48,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351466260] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:12:48,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434849938] [2023-12-02 17:12:48,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:12:48,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:12:48,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:12:48,624 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:12:48,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 17:12:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:12:48,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:12:48,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:12:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 17:12:48,881 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:12:48,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434849938] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:12:48,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:12:48,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 17:12:48,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53746060] [2023-12-02 17:12:48,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:12:48,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:12:48,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:12:48,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:12:48,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:12:48,884 INFO L87 Difference]: Start difference. First operand 5761 states and 8740 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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) [2023-12-02 17:12:49,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:12:49,611 INFO L93 Difference]: Finished difference Result 17150 states and 26685 transitions. [2023-12-02 17:12:49,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:12:49,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 116 [2023-12-02 17:12:49,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:12:49,691 INFO L225 Difference]: With dead ends: 17150 [2023-12-02 17:12:49,691 INFO L226 Difference]: Without dead ends: 11395 [2023-12-02 17:12:49,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:12:49,717 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 200 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:12:49,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 391 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:12:49,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11395 states. [2023-12-02 17:12:50,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11395 to 11353. [2023-12-02 17:12:50,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11353 states, 9556 states have (on average 1.4453746337379656) internal successors, (13812), 9605 states have internal predecessors, (13812), 1316 states have call successors, (1316), 480 states have call predecessors, (1316), 480 states have return successors, (1988), 1268 states have call predecessors, (1988), 1316 states have call successors, (1988) [2023-12-02 17:12:50,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11353 states to 11353 states and 17116 transitions. [2023-12-02 17:12:50,558 INFO L78 Accepts]: Start accepts. Automaton has 11353 states and 17116 transitions. Word has length 116 [2023-12-02 17:12:50,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:12:50,558 INFO L495 AbstractCegarLoop]: Abstraction has 11353 states and 17116 transitions. [2023-12-02 17:12:50,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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) [2023-12-02 17:12:50,559 INFO L276 IsEmpty]: Start isEmpty. Operand 11353 states and 17116 transitions. [2023-12-02 17:12:50,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-02 17:12:50,596 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:12:50,596 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:12:50,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 17:12:50,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 17:12:50,797 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:12:50,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:12:50,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1808251692, now seen corresponding path program 1 times [2023-12-02 17:12:50,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:12:50,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123389501] [2023-12-02 17:12:50,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:12:50,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:12:50,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:12:50,944 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-02 17:12:50,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:12:50,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123389501] [2023-12-02 17:12:50,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123389501] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:12:50,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:12:50,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:12:50,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025980926] [2023-12-02 17:12:50,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:12:50,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:12:50,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:12:50,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:12:50,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:12:50,946 INFO L87 Difference]: Start difference. First operand 11353 states and 17116 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2023-12-02 17:12:51,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:12:51,828 INFO L93 Difference]: Finished difference Result 23163 states and 35661 transitions. [2023-12-02 17:12:51,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:12:51,829 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), 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 116 [2023-12-02 17:12:51,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:12:51,896 INFO L225 Difference]: With dead ends: 23163 [2023-12-02 17:12:51,896 INFO L226 Difference]: Without dead ends: 14073 [2023-12-02 17:12:51,931 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 [2023-12-02 17:12:51,931 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 110 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:12:51,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 525 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:12:51,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14073 states. [2023-12-02 17:12:52,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14073 to 13257. [2023-12-02 17:12:52,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13257 states, 11396 states have (on average 1.4717444717444716) internal successors, (16772), 11445 states have internal predecessors, (16772), 1348 states have call successors, (1348), 512 states have call predecessors, (1348), 512 states have return successors, (2020), 1300 states have call predecessors, (2020), 1348 states have call successors, (2020) [2023-12-02 17:12:52,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13257 states to 13257 states and 20140 transitions. [2023-12-02 17:12:52,847 INFO L78 Accepts]: Start accepts. Automaton has 13257 states and 20140 transitions. Word has length 116 [2023-12-02 17:12:52,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:12:52,847 INFO L495 AbstractCegarLoop]: Abstraction has 13257 states and 20140 transitions. [2023-12-02 17:12:52,847 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), 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) [2023-12-02 17:12:52,847 INFO L276 IsEmpty]: Start isEmpty. Operand 13257 states and 20140 transitions. [2023-12-02 17:12:52,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-12-02 17:12:52,873 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:12:52,873 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, 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, 1, 1] [2023-12-02 17:12:52,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 17:12:52,874 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:12:52,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:12:52,874 INFO L85 PathProgramCache]: Analyzing trace with hash -946510085, now seen corresponding path program 1 times [2023-12-02 17:12:52,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:12:52,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888707510] [2023-12-02 17:12:52,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:12:52,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:12:52,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:12:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-12-02 17:12:52,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:12:52,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888707510] [2023-12-02 17:12:52,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888707510] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:12:52,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:12:52,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:12:52,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613925131] [2023-12-02 17:12:52,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:12:52,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:12:52,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:12:52,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:12:52,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:12:52,955 INFO L87 Difference]: Start difference. First operand 13257 states and 20140 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-12-02 17:12:54,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:12:54,245 INFO L93 Difference]: Finished difference Result 39406 states and 61073 transitions. [2023-12-02 17:12:54,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:12:54,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 158 [2023-12-02 17:12:54,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:12:54,329 INFO L225 Difference]: With dead ends: 39406 [2023-12-02 17:12:54,329 INFO L226 Difference]: Without dead ends: 26155 [2023-12-02 17:12:54,351 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 [2023-12-02 17:12:54,352 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 203 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:12:54,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 393 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:12:54,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26155 states. [2023-12-02 17:12:55,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26155 to 26041. [2023-12-02 17:12:55,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26041 states, 22404 states have (on average 1.4627745045527585) internal successors, (32772), 22501 states have internal predecessors, (32772), 2612 states have call successors, (2612), 1024 states have call predecessors, (2612), 1024 states have return successors, (3892), 2516 states have call predecessors, (3892), 2612 states have call successors, (3892) [2023-12-02 17:12:55,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26041 states to 26041 states and 39276 transitions. [2023-12-02 17:12:55,890 INFO L78 Accepts]: Start accepts. Automaton has 26041 states and 39276 transitions. Word has length 158 [2023-12-02 17:12:55,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:12:55,891 INFO L495 AbstractCegarLoop]: Abstraction has 26041 states and 39276 transitions. [2023-12-02 17:12:55,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-12-02 17:12:55,891 INFO L276 IsEmpty]: Start isEmpty. Operand 26041 states and 39276 transitions. [2023-12-02 17:12:55,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-12-02 17:12:55,954 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:12:55,954 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, 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, 1, 1] [2023-12-02 17:12:55,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-02 17:12:55,954 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:12:55,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:12:55,955 INFO L85 PathProgramCache]: Analyzing trace with hash -2056229303, now seen corresponding path program 1 times [2023-12-02 17:12:55,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:12:55,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700104684] [2023-12-02 17:12:55,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:12:55,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:12:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:12:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-12-02 17:12:56,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:12:56,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700104684] [2023-12-02 17:12:56,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700104684] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:12:56,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:12:56,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:12:56,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770521080] [2023-12-02 17:12:56,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:12:56,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:12:56,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:12:56,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:12:56,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:12:56,057 INFO L87 Difference]: Start difference. First operand 26041 states and 39276 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-12-02 17:12:58,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:12:58,797 INFO L93 Difference]: Finished difference Result 77406 states and 119009 transitions. [2023-12-02 17:12:58,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:12:58,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 158 [2023-12-02 17:12:58,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:12:58,993 INFO L225 Difference]: With dead ends: 77406 [2023-12-02 17:12:58,994 INFO L226 Difference]: Without dead ends: 51371 [2023-12-02 17:12:59,054 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 [2023-12-02 17:12:59,055 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 205 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:12:59,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 393 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:12:59,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51371 states. [2023-12-02 17:13:01,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51371 to 51145. [2023-12-02 17:13:02,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51145 states, 44036 states have (on average 1.4534471795803434) internal successors, (64004), 44229 states have internal predecessors, (64004), 5060 states have call successors, (5060), 2048 states have call predecessors, (5060), 2048 states have return successors, (7492), 4868 states have call predecessors, (7492), 5060 states have call successors, (7492) [2023-12-02 17:13:02,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51145 states to 51145 states and 76556 transitions. [2023-12-02 17:13:02,257 INFO L78 Accepts]: Start accepts. Automaton has 51145 states and 76556 transitions. Word has length 158 [2023-12-02 17:13:02,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:13:02,258 INFO L495 AbstractCegarLoop]: Abstraction has 51145 states and 76556 transitions. [2023-12-02 17:13:02,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-12-02 17:13:02,258 INFO L276 IsEmpty]: Start isEmpty. Operand 51145 states and 76556 transitions. [2023-12-02 17:13:02,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-12-02 17:13:02,364 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:13:02,364 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, 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, 1, 1] [2023-12-02 17:13:02,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-02 17:13:02,364 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:13:02,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:13:02,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1931819070, now seen corresponding path program 1 times [2023-12-02 17:13:02,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:13:02,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209056034] [2023-12-02 17:13:02,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:13:02,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:13:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:13:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-12-02 17:13:02,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:13:02,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209056034] [2023-12-02 17:13:02,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209056034] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:13:02,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:13:02,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:13:02,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39881062] [2023-12-02 17:13:02,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:13:02,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:13:02,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:13:02,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:13:02,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:13:02,490 INFO L87 Difference]: Start difference. First operand 51145 states and 76556 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-12-02 17:13:07,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:13:07,128 INFO L93 Difference]: Finished difference Result 152014 states and 231761 transitions. [2023-12-02 17:13:07,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:13:07,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 158 [2023-12-02 17:13:07,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:13:07,688 INFO L225 Difference]: With dead ends: 152014 [2023-12-02 17:13:07,688 INFO L226 Difference]: Without dead ends: 100875 [2023-12-02 17:13:07,865 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 [2023-12-02 17:13:07,866 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 208 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:13:07,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 393 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:13:07,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100875 states. [2023-12-02 17:13:13,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100875 to 100425. [2023-12-02 17:13:13,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100425 states, 86532 states have (on average 1.4437664678962696) internal successors, (124932), 86917 states have internal predecessors, (124932), 9796 states have call successors, (9796), 4096 states have call predecessors, (9796), 4096 states have return successors, (14404), 9412 states have call predecessors, (14404), 9796 states have call successors, (14404) [2023-12-02 17:13:13,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100425 states to 100425 states and 149132 transitions. [2023-12-02 17:13:13,676 INFO L78 Accepts]: Start accepts. Automaton has 100425 states and 149132 transitions. Word has length 158 [2023-12-02 17:13:13,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:13:13,677 INFO L495 AbstractCegarLoop]: Abstraction has 100425 states and 149132 transitions. [2023-12-02 17:13:13,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-12-02 17:13:13,677 INFO L276 IsEmpty]: Start isEmpty. Operand 100425 states and 149132 transitions. [2023-12-02 17:13:14,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-12-02 17:13:14,145 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:13:14,145 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, 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, 1, 1] [2023-12-02 17:13:14,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-02 17:13:14,146 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:13:14,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:13:14,146 INFO L85 PathProgramCache]: Analyzing trace with hash -879934748, now seen corresponding path program 1 times [2023-12-02 17:13:14,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:13:14,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181502359] [2023-12-02 17:13:14,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:13:14,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:13:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:13:14,240 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-12-02 17:13:14,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:13:14,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181502359] [2023-12-02 17:13:14,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181502359] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:13:14,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:13:14,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:13:14,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292385917] [2023-12-02 17:13:14,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:13:14,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:13:14,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:13:14,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:13:14,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:13:14,243 INFO L87 Difference]: Start difference. First operand 100425 states and 149132 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-12-02 17:13:23,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:13:23,554 INFO L93 Difference]: Finished difference Result 298446 states and 451025 transitions. [2023-12-02 17:13:23,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:13:23,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 158 [2023-12-02 17:13:23,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:13:24,133 INFO L225 Difference]: With dead ends: 298446 [2023-12-02 17:13:24,133 INFO L226 Difference]: Without dead ends: 198027 [2023-12-02 17:13:24,339 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 [2023-12-02 17:13:24,340 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 210 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:13:24,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 407 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:13:24,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198027 states. [2023-12-02 17:13:34,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198027 to 197129. [2023-12-02 17:13:34,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197129 states, 169988 states have (on average 1.4337247335106007) internal successors, (243716), 170757 states have internal predecessors, (243716), 18948 states have call successors, (18948), 8192 states have call predecessors, (18948), 8192 states have return successors, (27652), 18180 states have call predecessors, (27652), 18948 states have call successors, (27652) [2023-12-02 17:13:35,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197129 states to 197129 states and 290316 transitions. [2023-12-02 17:13:35,320 INFO L78 Accepts]: Start accepts. Automaton has 197129 states and 290316 transitions. Word has length 158 [2023-12-02 17:13:35,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:13:35,321 INFO L495 AbstractCegarLoop]: Abstraction has 197129 states and 290316 transitions. [2023-12-02 17:13:35,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-12-02 17:13:35,321 INFO L276 IsEmpty]: Start isEmpty. Operand 197129 states and 290316 transitions. [2023-12-02 17:13:35,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-12-02 17:13:35,949 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:13:35,949 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, 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, 1, 1] [2023-12-02 17:13:35,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-02 17:13:35,950 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:13:35,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:13:35,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1294547387, now seen corresponding path program 1 times [2023-12-02 17:13:35,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:13:35,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600056645] [2023-12-02 17:13:35,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:13:35,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:13:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:13:36,436 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 12 proven. 62 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-12-02 17:13:36,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:13:36,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600056645] [2023-12-02 17:13:36,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600056645] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:13:36,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95004935] [2023-12-02 17:13:36,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:13:36,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:13:36,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:13:36,437 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:13:36,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 17:13:36,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:13:36,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 1210 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 17:13:36,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:13:36,887 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 88 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:13:36,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:13:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 13 proven. 62 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-12-02 17:13:37,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95004935] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:13:37,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [671829621] [2023-12-02 17:13:37,225 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-12-02 17:13:37,225 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:13:37,225 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:13:37,226 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:13:37,226 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:14:03,572 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 222 for LOIs [2023-12-02 17:14:03,976 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 1 for LOIs [2023-12-02 17:14:04,019 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 92 for LOIs [2023-12-02 17:14:04,036 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 134 for LOIs [2023-12-02 17:14:04,634 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 89 for LOIs [2023-12-02 17:14:07,207 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 92 for LOIs [2023-12-02 17:14:07,296 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:14:36,029 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1260784#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (= ~p_num_write~0 0) (<= 1 |#StackHeapBarrier|) (<= ~local~0 2147483647) (= 0 ~t5_pc~0) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= ~t1_i~0 1) (= 0 ~t7_pc~0) (= ~p_last_write~0 0) (<= 0 (+ ~local~0 2147483648)) (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (= 0 ~t6_pc~0) (= 0 ~t3_pc~0) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (not (= (+ 9 ~local~0) ~token~0)) (<= 0 |ULTIMATE.start_eval2_~tmp~4#1|) (= ~t8_i~0 1) (= ~m_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (= |ULTIMATE.start_start_simulation2_~kernel_st~1#1| 1) (= 0 ~t9_pc~0) (= ~t6_i~0 1) (= ~p_dw_st~0 0) (= ~t7_i~0 1) (= ~t2_i~0 1) (<= |ULTIMATE.start_eval2_~tmp~4#1| 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (= ~t9_i~0 1) (= 0 ~t2_pc~0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (<= ~token~0 2147483647) (= ~t5_i~0 1) (= ~a_t~0 0) (= 0 ~t4_pc~0) (= ~t3_i~0 1) (= ~t4_i~0 1) (<= 0 (+ ~token~0 2147483648)))' at error location [2023-12-02 17:14:36,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:14:36,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:14:36,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2023-12-02 17:14:36,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106073569] [2023-12-02 17:14:36,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:14:36,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 17:14:36,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:14:36,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 17:14:36,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=604, Invalid=5558, Unknown=0, NotChecked=0, Total=6162 [2023-12-02 17:14:36,034 INFO L87 Difference]: Start difference. First operand 197129 states and 290316 transitions. Second operand has 13 states, 13 states have (on average 19.53846153846154) internal successors, (254), 13 states have internal predecessors, (254), 8 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) [2023-12-02 17:14:59,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:14:59,729 INFO L93 Difference]: Finished difference Result 718353 states and 1073296 transitions. [2023-12-02 17:14:59,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 17:14:59,729 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 19.53846153846154) internal successors, (254), 13 states have internal predecessors, (254), 8 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) Word has length 178 [2023-12-02 17:14:59,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:15:01,474 INFO L225 Difference]: With dead ends: 718353 [2023-12-02 17:15:01,474 INFO L226 Difference]: Without dead ends: 521231 [2023-12-02 17:15:01,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 448 SyntacticMatches, 30 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5102 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=1050, Invalid=9456, Unknown=0, NotChecked=0, Total=10506 [2023-12-02 17:15:01,979 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 3116 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3116 SdHoareTripleChecker+Valid, 1383 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:15:01,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3116 Valid, 1383 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 17:15:02,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521231 states. [2023-12-02 17:15:30,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521231 to 457993. [2023-12-02 17:15:30,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457993 states, 393988 states have (on average 1.4152004629582626) internal successors, (557572), 395909 states have internal predecessors, (557572), 44420 states have call successors, (44420), 19584 states have call predecessors, (44420), 19584 states have return successors, (66244), 42500 states have call predecessors, (66244), 44420 states have call successors, (66244) [2023-12-02 17:15:32,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457993 states to 457993 states and 668236 transitions. [2023-12-02 17:15:32,469 INFO L78 Accepts]: Start accepts. Automaton has 457993 states and 668236 transitions. Word has length 178 [2023-12-02 17:15:32,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:15:32,469 INFO L495 AbstractCegarLoop]: Abstraction has 457993 states and 668236 transitions. [2023-12-02 17:15:32,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.53846153846154) internal successors, (254), 13 states have internal predecessors, (254), 8 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) [2023-12-02 17:15:32,469 INFO L276 IsEmpty]: Start isEmpty. Operand 457993 states and 668236 transitions. [2023-12-02 17:15:33,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2023-12-02 17:15:33,429 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:15:33,429 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 17:15:33,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 17:15:33,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:15:33,630 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:15:33,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:15:33,630 INFO L85 PathProgramCache]: Analyzing trace with hash 924194716, now seen corresponding path program 1 times [2023-12-02 17:15:33,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:15:33,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573306876] [2023-12-02 17:15:33,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:15:33,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:15:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:15:34,194 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 17 proven. 63 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-12-02 17:15:34,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:15:34,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573306876] [2023-12-02 17:15:34,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573306876] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:15:34,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264594185] [2023-12-02 17:15:34,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:15:34,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:15:34,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:15:34,195 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:15:34,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c4573-0b12-42b9-8b28-4c5c408eaf21/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 17:15:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:15:34,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 1077 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:15:34,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:15:34,471 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 17:15:34,471 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:15:34,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264594185] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:15:34,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:15:34,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 17:15:34,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163159299] [2023-12-02 17:15:34,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:15:34,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:15:34,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:15:34,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:15:34,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:15:34,473 INFO L87 Difference]: Start difference. First operand 457993 states and 668236 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 17:16:02,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:16:02,421 INFO L93 Difference]: Finished difference Result 918507 states and 1342421 transitions. [2023-12-02 17:16:02,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:16:02,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 186 [2023-12-02 17:16:02,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:16:04,047 INFO L225 Difference]: With dead ends: 918507 [2023-12-02 17:16:04,048 INFO L226 Difference]: Without dead ends: 580969 [2023-12-02 17:16:05,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:16:05,134 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 196 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:16:05,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 286 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:16:05,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580969 states.