./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-2.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_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/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_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/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_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/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 f9db8f562e00e8e2c77bd4109a87025a2d9cfdc1d504bc43872dc3be0602b46a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:43:28,937 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:43:29,005 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 14:43:29,011 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:43:29,011 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:43:29,043 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:43:29,044 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:43:29,044 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:43:29,045 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:43:29,046 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:43:29,046 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:43:29,047 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:43:29,047 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:43:29,048 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 14:43:29,048 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:43:29,049 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:43:29,061 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 14:43:29,061 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 14:43:29,062 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:43:29,063 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 14:43:29,063 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 14:43:29,064 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 14:43:29,065 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:43:29,065 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 14:43:29,065 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 14:43:29,066 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 14:43:29,066 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 14:43:29,067 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:43:29,067 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 14:43:29,067 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:43:29,068 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 14:43:29,068 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 14:43:29,068 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 14:43:29,069 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:43:29,069 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:43:29,069 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:43:29,069 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:43:29,070 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:43:29,070 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:43:29,070 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:43:29,070 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 14:43:29,071 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 14:43:29,071 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 14:43:29,071 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:43:29,071 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 14:43:29,071 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:43:29,071 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:43:29,072 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_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9db8f562e00e8e2c77bd4109a87025a2d9cfdc1d504bc43872dc3be0602b46a [2023-12-02 14:43:29,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:43:29,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:43:29,290 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:43:29,291 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:43:29,292 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:43:29,293 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-2.c [2023-12-02 14:43:32,039 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:43:32,256 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:43:32,257 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-2.c [2023-12-02 14:43:32,274 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/data/0781a7b46/f4d4f606e9bd4e3ea651cb6f62593c53/FLAG3bf3af1ce [2023-12-02 14:43:32,289 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/data/0781a7b46/f4d4f606e9bd4e3ea651cb6f62593c53 [2023-12-02 14:43:32,292 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:43:32,301 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:43:32,302 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:43:32,302 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:43:32,307 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:43:32,308 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:43:32" (1/1) ... [2023-12-02 14:43:32,309 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@228eb33d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:43:32, skipping insertion in model container [2023-12-02 14:43:32,309 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:43:32" (1/1) ... [2023-12-02 14:43:32,374 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:43:32,529 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_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-2.c[911,924] [2023-12-02 14:43:32,601 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_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-2.c[8416,8429] [2023-12-02 14:43:32,698 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:43:32,713 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 14:43:32,725 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_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-2.c[911,924] [2023-12-02 14:43:32,745 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_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-2.c[8416,8429] [2023-12-02 14:43:32,787 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:43:32,814 INFO L206 MainTranslator]: Completed translation [2023-12-02 14:43:32,815 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:43:32 WrapperNode [2023-12-02 14:43:32,815 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:43:32,816 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 14:43:32,816 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 14:43:32,816 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 14:43:32,824 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:43:32" (1/1) ... [2023-12-02 14:43:32,840 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:43:32" (1/1) ... [2023-12-02 14:43:32,882 INFO L138 Inliner]: procedures = 75, calls = 91, calls flagged for inlining = 44, calls inlined = 44, statements flattened = 988 [2023-12-02 14:43:32,882 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 14:43:32,883 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 14:43:32,883 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 14:43:32,883 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 14:43:32,890 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:43:32" (1/1) ... [2023-12-02 14:43:32,890 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:43:32" (1/1) ... [2023-12-02 14:43:32,894 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:43:32" (1/1) ... [2023-12-02 14:43:32,894 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:43:32" (1/1) ... [2023-12-02 14:43:32,911 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:43:32" (1/1) ... [2023-12-02 14:43:32,926 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:43:32" (1/1) ... [2023-12-02 14:43:32,929 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:43:32" (1/1) ... [2023-12-02 14:43:32,934 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:43:32" (1/1) ... [2023-12-02 14:43:32,941 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 14:43:32,942 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 14:43:32,942 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 14:43:32,942 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 14:43:32,943 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:43:32" (1/1) ... [2023-12-02 14:43:32,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:43:32,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:43:32,978 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 14:43:32,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 14:43:33,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 14:43:33,024 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 14:43:33,024 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 14:43:33,024 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-12-02 14:43:33,025 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-12-02 14:43:33,025 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-12-02 14:43:33,025 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-12-02 14:43:33,025 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-12-02 14:43:33,026 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-12-02 14:43:33,026 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-12-02 14:43:33,026 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-12-02 14:43:33,026 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-12-02 14:43:33,026 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-12-02 14:43:33,027 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-12-02 14:43:33,027 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-12-02 14:43:33,027 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-12-02 14:43:33,027 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-12-02 14:43:33,028 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-12-02 14:43:33,028 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-12-02 14:43:33,028 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-12-02 14:43:33,028 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-12-02 14:43:33,028 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-12-02 14:43:33,029 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-12-02 14:43:33,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 14:43:33,029 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-12-02 14:43:33,029 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-12-02 14:43:33,029 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-12-02 14:43:33,029 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-12-02 14:43:33,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 14:43:33,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 14:43:33,030 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-12-02 14:43:33,030 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-12-02 14:43:33,165 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 14:43:33,167 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 14:43:33,929 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2023-12-02 14:43:33,929 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2023-12-02 14:43:34,005 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 14:43:34,392 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 14:43:34,392 INFO L309 CfgBuilder]: Removed 17 assume(true) statements. [2023-12-02 14:43:34,394 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:43:34 BoogieIcfgContainer [2023-12-02 14:43:34,394 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 14:43:34,397 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 14:43:34,397 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 14:43:34,401 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 14:43:34,401 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:43:32" (1/3) ... [2023-12-02 14:43:34,401 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d582d99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:43:34, skipping insertion in model container [2023-12-02 14:43:34,401 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:43:32" (2/3) ... [2023-12-02 14:43:34,402 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d582d99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:43:34, skipping insertion in model container [2023-12-02 14:43:34,402 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:43:34" (3/3) ... [2023-12-02 14:43:34,403 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.10.cil-2.c [2023-12-02 14:43:34,419 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 14:43:34,419 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 14:43:34,468 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:43:34,473 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;@5e4868b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:43:34,473 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 14:43:34,479 INFO L276 IsEmpty]: Start isEmpty. Operand has 256 states, 199 states have (on average 1.5075376884422111) internal successors, (300), 205 states have internal predecessors, (300), 40 states have call successors, (40), 14 states have call predecessors, (40), 14 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2023-12-02 14:43:34,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 14:43:34,488 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:34,489 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] [2023-12-02 14:43:34,489 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:43:34,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:34,494 INFO L85 PathProgramCache]: Analyzing trace with hash -940647656, now seen corresponding path program 1 times [2023-12-02 14:43:34,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:34,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866123255] [2023-12-02 14:43:34,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:34,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:34,832 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 14:43:34,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:34,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866123255] [2023-12-02 14:43:34,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866123255] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:43:34,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:43:34,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 14:43:34,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172584015] [2023-12-02 14:43:34,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:43:34,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:43:34,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:34,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:43:34,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:43:34,878 INFO L87 Difference]: Start difference. First operand has 256 states, 199 states have (on average 1.5075376884422111) internal successors, (300), 205 states have internal predecessors, (300), 40 states have call successors, (40), 14 states have call predecessors, (40), 14 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 14:43:35,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:35,343 INFO L93 Difference]: Finished difference Result 635 states and 938 transitions. [2023-12-02 14:43:35,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 14:43:35,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2023-12-02 14:43:35,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:35,360 INFO L225 Difference]: With dead ends: 635 [2023-12-02 14:43:35,361 INFO L226 Difference]: Without dead ends: 380 [2023-12-02 14:43:35,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:43:35,370 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 431 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:35,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 649 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 14:43:35,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-12-02 14:43:35,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 369. [2023-12-02 14:43:35,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 280 states have (on average 1.4285714285714286) internal successors, (400), 284 states have internal predecessors, (400), 60 states have call successors, (60), 28 states have call predecessors, (60), 27 states have return successors, (61), 58 states have call predecessors, (61), 58 states have call successors, (61) [2023-12-02 14:43:35,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 521 transitions. [2023-12-02 14:43:35,448 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 521 transitions. Word has length 44 [2023-12-02 14:43:35,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:35,449 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 521 transitions. [2023-12-02 14:43:35,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 14:43:35,449 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 521 transitions. [2023-12-02 14:43:35,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 14:43:35,452 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:35,452 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] [2023-12-02 14:43:35,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 14:43:35,453 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:43:35,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:35,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1211889317, now seen corresponding path program 1 times [2023-12-02 14:43:35,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:35,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809870622] [2023-12-02 14:43:35,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:35,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:35,572 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 14:43:35,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:35,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809870622] [2023-12-02 14:43:35,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809870622] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:43:35,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:43:35,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 14:43:35,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630695559] [2023-12-02 14:43:35,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:43:35,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:43:35,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:35,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:43:35,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:43:35,576 INFO L87 Difference]: Start difference. First operand 369 states and 521 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 14:43:36,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:36,476 INFO L93 Difference]: Finished difference Result 906 states and 1244 transitions. [2023-12-02 14:43:36,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 14:43:36,477 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2023-12-02 14:43:36,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:36,482 INFO L225 Difference]: With dead ends: 906 [2023-12-02 14:43:36,482 INFO L226 Difference]: Without dead ends: 440 [2023-12-02 14:43:36,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-12-02 14:43:36,486 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 932 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:36,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [941 Valid, 1079 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 14:43:36,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2023-12-02 14:43:36,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 355. [2023-12-02 14:43:36,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 266 states have (on average 1.3796992481203008) internal successors, (367), 270 states have internal predecessors, (367), 60 states have call successors, (60), 28 states have call predecessors, (60), 27 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2023-12-02 14:43:36,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 485 transitions. [2023-12-02 14:43:36,523 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 485 transitions. Word has length 45 [2023-12-02 14:43:36,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:36,524 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 485 transitions. [2023-12-02 14:43:36,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 14:43:36,524 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 485 transitions. [2023-12-02 14:43:36,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 14:43:36,526 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:36,527 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] [2023-12-02 14:43:36,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 14:43:36,527 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:43:36,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:36,528 INFO L85 PathProgramCache]: Analyzing trace with hash 795907519, now seen corresponding path program 1 times [2023-12-02 14:43:36,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:36,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680035182] [2023-12-02 14:43:36,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:36,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:36,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:36,721 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 14:43:36,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:36,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680035182] [2023-12-02 14:43:36,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680035182] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:43:36,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:43:36,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 14:43:36,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434953334] [2023-12-02 14:43:36,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:43:36,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 14:43:36,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:36,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 14:43:36,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 14:43:36,724 INFO L87 Difference]: Start difference. First operand 355 states and 485 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 14:43:37,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:37,601 INFO L93 Difference]: Finished difference Result 657 states and 853 transitions. [2023-12-02 14:43:37,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 14:43:37,605 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2023-12-02 14:43:37,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:37,609 INFO L225 Difference]: With dead ends: 657 [2023-12-02 14:43:37,609 INFO L226 Difference]: Without dead ends: 483 [2023-12-02 14:43:37,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-12-02 14:43:37,611 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 517 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:37,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 925 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 14:43:37,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2023-12-02 14:43:37,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 457. [2023-12-02 14:43:37,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 334 states have (on average 1.344311377245509) internal successors, (449), 338 states have internal predecessors, (449), 80 states have call successors, (80), 42 states have call predecessors, (80), 41 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-12-02 14:43:37,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 607 transitions. [2023-12-02 14:43:37,654 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 607 transitions. Word has length 46 [2023-12-02 14:43:37,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:37,655 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 607 transitions. [2023-12-02 14:43:37,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 14:43:37,655 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 607 transitions. [2023-12-02 14:43:37,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 14:43:37,657 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:37,657 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:43:37,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 14:43:37,658 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:43:37,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:37,658 INFO L85 PathProgramCache]: Analyzing trace with hash 806311086, now seen corresponding path program 1 times [2023-12-02 14:43:37,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:37,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930353207] [2023-12-02 14:43:37,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:37,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:37,706 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 14:43:37,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:37,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930353207] [2023-12-02 14:43:37,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930353207] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:43:37,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:43:37,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:43:37,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302942570] [2023-12-02 14:43:37,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:43:37,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:43:37,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:37,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:43:37,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:43:37,708 INFO L87 Difference]: Start difference. First operand 457 states and 607 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 14:43:37,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:37,821 INFO L93 Difference]: Finished difference Result 722 states and 943 transitions. [2023-12-02 14:43:37,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:43:37,821 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), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2023-12-02 14:43:37,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:37,824 INFO L225 Difference]: With dead ends: 722 [2023-12-02 14:43:37,824 INFO L226 Difference]: Without dead ends: 176 [2023-12-02 14:43:37,825 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 14:43:37,827 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 332 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:37,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 289 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:43:37,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2023-12-02 14:43:37,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2023-12-02 14:43:37,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 145 states have (on average 1.4758620689655173) internal successors, (214), 146 states have internal predecessors, (214), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-12-02 14:43:37,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 262 transitions. [2023-12-02 14:43:37,841 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 262 transitions. Word has length 47 [2023-12-02 14:43:37,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:37,842 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 262 transitions. [2023-12-02 14:43:37,842 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), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 14:43:37,842 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 262 transitions. [2023-12-02 14:43:37,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-02 14:43:37,843 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:37,844 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:43:37,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 14:43:37,844 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:43:37,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:37,844 INFO L85 PathProgramCache]: Analyzing trace with hash 414937527, now seen corresponding path program 1 times [2023-12-02 14:43:37,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:37,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122435761] [2023-12-02 14:43:37,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:37,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:37,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:37,972 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 14:43:37,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:37,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122435761] [2023-12-02 14:43:37,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122435761] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:43:37,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:43:37,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 14:43:37,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474471933] [2023-12-02 14:43:37,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:43:37,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 14:43:37,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:37,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 14:43:37,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:43:37,976 INFO L87 Difference]: Start difference. First operand 176 states and 262 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 14:43:38,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:38,701 INFO L93 Difference]: Finished difference Result 999 states and 1582 transitions. [2023-12-02 14:43:38,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:43:38,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 61 [2023-12-02 14:43:38,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:38,708 INFO L225 Difference]: With dead ends: 999 [2023-12-02 14:43:38,709 INFO L226 Difference]: Without dead ends: 829 [2023-12-02 14:43:38,710 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 14:43:38,711 INFO L413 NwaCegarLoop]: 409 mSDtfsCounter, 1194 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1194 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:38,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1194 Valid, 1118 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 14:43:38,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2023-12-02 14:43:38,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 818. [2023-12-02 14:43:38,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 686 states have (on average 1.4752186588921283) internal successors, (1012), 690 states have internal predecessors, (1012), 101 states have call successors, (101), 30 states have call predecessors, (101), 30 states have return successors, (155), 98 states have call predecessors, (155), 101 states have call successors, (155) [2023-12-02 14:43:38,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1268 transitions. [2023-12-02 14:43:38,769 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1268 transitions. Word has length 61 [2023-12-02 14:43:38,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:38,770 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 1268 transitions. [2023-12-02 14:43:38,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 14:43:38,770 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1268 transitions. [2023-12-02 14:43:38,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 14:43:38,775 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:38,775 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:43:38,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 14:43:38,775 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:43:38,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:38,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1196064262, now seen corresponding path program 1 times [2023-12-02 14:43:38,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:38,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611708] [2023-12-02 14:43:38,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:38,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 14:43:38,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:38,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611708] [2023-12-02 14:43:38,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611708] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:43:38,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641197034] [2023-12-02 14:43:38,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:38,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:43:38,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:43:38,961 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:43:38,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 14:43:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:39,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:43:39,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:43:39,280 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 14:43:39,281 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:43:39,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641197034] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:43:39,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:43:39,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 14:43:39,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512194655] [2023-12-02 14:43:39,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:43:39,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:43:39,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:39,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:43:39,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:43:39,283 INFO L87 Difference]: Start difference. First operand 818 states and 1268 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 14:43:39,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:39,488 INFO L93 Difference]: Finished difference Result 2426 states and 3868 transitions. [2023-12-02 14:43:39,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:43:39,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2023-12-02 14:43:39,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:39,501 INFO L225 Difference]: With dead ends: 2426 [2023-12-02 14:43:39,501 INFO L226 Difference]: Without dead ends: 1614 [2023-12-02 14:43:39,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 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 14:43:39,507 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 234 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:39,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 423 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:43:39,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2023-12-02 14:43:39,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1607. [2023-12-02 14:43:39,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1353 states have (on average 1.4708056171470805) internal successors, (1990), 1360 states have internal predecessors, (1990), 193 states have call successors, (193), 60 states have call predecessors, (193), 60 states have return successors, (297), 187 states have call predecessors, (297), 193 states have call successors, (297) [2023-12-02 14:43:39,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 2480 transitions. [2023-12-02 14:43:39,627 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 2480 transitions. Word has length 123 [2023-12-02 14:43:39,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:39,627 INFO L495 AbstractCegarLoop]: Abstraction has 1607 states and 2480 transitions. [2023-12-02 14:43:39,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 14:43:39,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 2480 transitions. [2023-12-02 14:43:39,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 14:43:39,632 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:39,633 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:43:39,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-02 14:43:39,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 14:43:39,835 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:43:39,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:39,835 INFO L85 PathProgramCache]: Analyzing trace with hash 417747866, now seen corresponding path program 1 times [2023-12-02 14:43:39,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:39,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903204226] [2023-12-02 14:43:39,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:39,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:39,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:40,063 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 14:43:40,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:40,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903204226] [2023-12-02 14:43:40,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903204226] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:43:40,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405280542] [2023-12-02 14:43:40,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:40,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:43:40,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:43:40,067 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:43:40,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 14:43:40,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:40,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:43:40,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:43:40,384 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 14:43:40,384 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:43:40,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405280542] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:43:40,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:43:40,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 14:43:40,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983303509] [2023-12-02 14:43:40,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:43:40,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:43:40,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:40,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:43:40,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:43:40,387 INFO L87 Difference]: Start difference. First operand 1607 states and 2480 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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 14:43:40,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:40,694 INFO L93 Difference]: Finished difference Result 4778 states and 7578 transitions. [2023-12-02 14:43:40,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:43:40,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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 123 [2023-12-02 14:43:40,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:40,717 INFO L225 Difference]: With dead ends: 4778 [2023-12-02 14:43:40,717 INFO L226 Difference]: Without dead ends: 3177 [2023-12-02 14:43:40,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 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 14:43:40,725 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 213 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:40,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 423 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:43:40,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3177 states. [2023-12-02 14:43:40,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3177 to 3165. [2023-12-02 14:43:40,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3165 states, 2672 states have (on average 1.465568862275449) internal successors, (3916), 2685 states have internal predecessors, (3916), 372 states have call successors, (372), 120 states have call predecessors, (372), 120 states have return successors, (572), 360 states have call predecessors, (572), 372 states have call successors, (572) [2023-12-02 14:43:40,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3165 states to 3165 states and 4860 transitions. [2023-12-02 14:43:40,970 INFO L78 Accepts]: Start accepts. Automaton has 3165 states and 4860 transitions. Word has length 123 [2023-12-02 14:43:40,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:40,970 INFO L495 AbstractCegarLoop]: Abstraction has 3165 states and 4860 transitions. [2023-12-02 14:43:40,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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 14:43:40,970 INFO L276 IsEmpty]: Start isEmpty. Operand 3165 states and 4860 transitions. [2023-12-02 14:43:40,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 14:43:40,977 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:40,977 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:43:40,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 14:43:41,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:43:41,178 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:43:41,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:41,178 INFO L85 PathProgramCache]: Analyzing trace with hash 956415482, now seen corresponding path program 1 times [2023-12-02 14:43:41,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:41,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672179308] [2023-12-02 14:43:41,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:41,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 14:43:41,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:41,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672179308] [2023-12-02 14:43:41,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672179308] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:43:41,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638066864] [2023-12-02 14:43:41,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:41,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:43:41,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:43:41,350 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:43:41,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 14:43:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:41,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:43:41,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:43:41,632 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 14:43:41,632 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:43:41,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638066864] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:43:41,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:43:41,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 14:43:41,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795675628] [2023-12-02 14:43:41,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:43:41,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:43:41,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:41,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:43:41,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:43:41,635 INFO L87 Difference]: Start difference. First operand 3165 states and 4860 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 14:43:42,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:42,079 INFO L93 Difference]: Finished difference Result 9422 states and 14857 transitions. [2023-12-02 14:43:42,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:43:42,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 123 [2023-12-02 14:43:42,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:42,124 INFO L225 Difference]: With dead ends: 9422 [2023-12-02 14:43:42,124 INFO L226 Difference]: Without dead ends: 6263 [2023-12-02 14:43:42,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 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 14:43:42,140 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 225 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:42,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 423 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:43:42,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6263 states. [2023-12-02 14:43:42,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6263 to 6241. [2023-12-02 14:43:42,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6241 states, 5280 states have (on average 1.459848484848485) internal successors, (7708), 5305 states have internal predecessors, (7708), 720 states have call successors, (720), 240 states have call predecessors, (720), 240 states have return successors, (1104), 696 states have call predecessors, (1104), 720 states have call successors, (1104) [2023-12-02 14:43:42,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6241 states to 6241 states and 9532 transitions. [2023-12-02 14:43:42,627 INFO L78 Accepts]: Start accepts. Automaton has 6241 states and 9532 transitions. Word has length 123 [2023-12-02 14:43:42,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:42,627 INFO L495 AbstractCegarLoop]: Abstraction has 6241 states and 9532 transitions. [2023-12-02 14:43:42,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 14:43:42,627 INFO L276 IsEmpty]: Start isEmpty. Operand 6241 states and 9532 transitions. [2023-12-02 14:43:42,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 14:43:42,638 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:42,639 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:43:42,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 14:43:42,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 14:43:42,840 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:43:42,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:42,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1167026086, now seen corresponding path program 1 times [2023-12-02 14:43:42,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:42,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346596474] [2023-12-02 14:43:42,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:42,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 14:43:42,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:42,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346596474] [2023-12-02 14:43:42,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346596474] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:43:42,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481305197] [2023-12-02 14:43:42,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:42,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:43:42,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:43:42,975 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:43:42,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 14:43:43,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:43,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:43:43,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:43:43,232 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 14:43:43,233 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:43:43,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481305197] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:43:43,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:43:43,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 14:43:43,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543210306] [2023-12-02 14:43:43,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:43:43,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:43:43,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:43,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:43:43,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:43:43,235 INFO L87 Difference]: Start difference. First operand 6241 states and 9532 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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 14:43:43,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:43,845 INFO L93 Difference]: Finished difference Result 18590 states and 29133 transitions. [2023-12-02 14:43:43,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:43:43,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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 123 [2023-12-02 14:43:43,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:43,938 INFO L225 Difference]: With dead ends: 18590 [2023-12-02 14:43:43,938 INFO L226 Difference]: Without dead ends: 12355 [2023-12-02 14:43:43,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 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 14:43:43,974 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 231 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:43,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 423 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:43:43,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12355 states. [2023-12-02 14:43:44,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12355 to 12313. [2023-12-02 14:43:44,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12313 states, 10436 states have (on average 1.4538137217324645) internal successors, (15172), 10485 states have internal predecessors, (15172), 1396 states have call successors, (1396), 480 states have call predecessors, (1396), 480 states have return successors, (2132), 1348 states have call predecessors, (2132), 1396 states have call successors, (2132) [2023-12-02 14:43:44,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12313 states to 12313 states and 18700 transitions. [2023-12-02 14:43:44,680 INFO L78 Accepts]: Start accepts. Automaton has 12313 states and 18700 transitions. Word has length 123 [2023-12-02 14:43:44,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:44,680 INFO L495 AbstractCegarLoop]: Abstraction has 12313 states and 18700 transitions. [2023-12-02 14:43:44,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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 14:43:44,681 INFO L276 IsEmpty]: Start isEmpty. Operand 12313 states and 18700 transitions. [2023-12-02 14:43:44,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 14:43:44,694 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:44,694 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:43:44,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 14:43:44,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-12-02 14:43:44,895 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:43:44,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:44,896 INFO L85 PathProgramCache]: Analyzing trace with hash -701879622, now seen corresponding path program 1 times [2023-12-02 14:43:44,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:44,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644113363] [2023-12-02 14:43:44,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:44,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 14:43:45,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:45,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644113363] [2023-12-02 14:43:45,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644113363] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:43:45,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356448017] [2023-12-02 14:43:45,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:45,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:43:45,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:43:45,045 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:43:45,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 14:43:45,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:45,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:43:45,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:43:45,316 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 14:43:45,316 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:43:45,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356448017] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:43:45,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:43:45,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 14:43:45,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837125871] [2023-12-02 14:43:45,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:43:45,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:43:45,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:45,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:43:45,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:43:45,319 INFO L87 Difference]: Start difference. First operand 12313 states and 18700 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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 14:43:46,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:46,473 INFO L93 Difference]: Finished difference Result 36686 states and 57121 transitions. [2023-12-02 14:43:46,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:43:46,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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 123 [2023-12-02 14:43:46,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:46,609 INFO L225 Difference]: With dead ends: 36686 [2023-12-02 14:43:46,609 INFO L226 Difference]: Without dead ends: 24379 [2023-12-02 14:43:46,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 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 14:43:46,652 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 219 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:46,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 423 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:43:46,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24379 states. [2023-12-02 14:43:47,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24379 to 24297. [2023-12-02 14:43:47,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24297 states, 20628 states have (on average 1.447547023463254) internal successors, (29860), 20725 states have internal predecessors, (29860), 2708 states have call successors, (2708), 960 states have call predecessors, (2708), 960 states have return successors, (4116), 2612 states have call predecessors, (4116), 2708 states have call successors, (4116) [2023-12-02 14:43:47,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24297 states to 24297 states and 36684 transitions. [2023-12-02 14:43:47,917 INFO L78 Accepts]: Start accepts. Automaton has 24297 states and 36684 transitions. Word has length 123 [2023-12-02 14:43:47,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:47,917 INFO L495 AbstractCegarLoop]: Abstraction has 24297 states and 36684 transitions. [2023-12-02 14:43:47,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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 14:43:47,918 INFO L276 IsEmpty]: Start isEmpty. Operand 24297 states and 36684 transitions. [2023-12-02 14:43:47,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 14:43:47,952 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:47,952 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:43:47,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 14:43:48,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911641cc-91d6-4a71-8aa5-4bd2f21f6c5b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 14:43:48,153 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:43:48,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:48,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1625574682, now seen corresponding path program 1 times [2023-12-02 14:43:48,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:48,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349754646] [2023-12-02 14:43:48,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:48,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:48,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:48,639 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 14:43:48,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:48,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349754646] [2023-12-02 14:43:48,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349754646] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:43:48,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:43:48,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 14:43:48,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60701909] [2023-12-02 14:43:48,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:43:48,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:43:48,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:48,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:43:48,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:43:48,642 INFO L87 Difference]: Start difference. First operand 24297 states and 36684 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 14:43:50,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:50,788 INFO L93 Difference]: Finished difference Result 65229 states and 99486 transitions. [2023-12-02 14:43:50,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 14:43:50,789 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 123 [2023-12-02 14:43:50,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:50,915 INFO L225 Difference]: With dead ends: 65229 [2023-12-02 14:43:50,916 INFO L226 Difference]: Without dead ends: 40939 [2023-12-02 14:43:50,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 14:43:50,951 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 677 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:50,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 732 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:43:50,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40939 states. [2023-12-02 14:43:52,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40939 to 38473. [2023-12-02 14:43:52,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38473 states, 32644 states have (on average 1.4411224114691827) internal successors, (47044), 32805 states have internal predecessors, (47044), 4292 states have call successors, (4292), 1536 states have call predecessors, (4292), 1536 states have return successors, (6708), 4132 states have call predecessors, (6708), 4292 states have call successors, (6708) [2023-12-02 14:43:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38473 states to 38473 states and 58044 transitions. [2023-12-02 14:43:52,840 INFO L78 Accepts]: Start accepts. Automaton has 38473 states and 58044 transitions. Word has length 123 [2023-12-02 14:43:52,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:52,841 INFO L495 AbstractCegarLoop]: Abstraction has 38473 states and 58044 transitions. [2023-12-02 14:43:52,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 14:43:52,841 INFO L276 IsEmpty]: Start isEmpty. Operand 38473 states and 58044 transitions. [2023-12-02 14:43:52,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-02 14:43:52,872 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:52,872 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:43:52,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 14:43:52,873 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:43:52,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:52,873 INFO L85 PathProgramCache]: Analyzing trace with hash 162778143, now seen corresponding path program 1 times [2023-12-02 14:43:52,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:52,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128500311] [2023-12-02 14:43:52,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:52,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:52,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:53,191 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 14:43:53,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:53,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128500311] [2023-12-02 14:43:53,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128500311] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:43:53,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:43:53,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 14:43:53,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530722698] [2023-12-02 14:43:53,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:43:53,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:43:53,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:53,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:43:53,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:43:53,194 INFO L87 Difference]: Start difference. First operand 38473 states and 58044 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 14:43:57,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:57,046 INFO L93 Difference]: Finished difference Result 122701 states and 187630 transitions. [2023-12-02 14:43:57,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 14:43:57,047 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 125 [2023-12-02 14:43:57,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:57,379 INFO L225 Difference]: With dead ends: 122701 [2023-12-02 14:43:57,379 INFO L226 Difference]: Without dead ends: 84235 [2023-12-02 14:43:57,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 14:43:57,478 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 726 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:57,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [745 Valid, 774 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:43:57,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84235 states. [2023-12-02 14:44:01,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84235 to 75401. [2023-12-02 14:44:01,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75401 states, 64004 states have (on average 1.4339728766952065) internal successors, (91780), 64325 states have internal predecessors, (91780), 8324 states have call successors, (8324), 3072 states have call predecessors, (8324), 3072 states have return successors, (12932), 8004 states have call predecessors, (12932), 8324 states have call successors, (12932) [2023-12-02 14:44:02,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75401 states to 75401 states and 113036 transitions. [2023-12-02 14:44:02,139 INFO L78 Accepts]: Start accepts. Automaton has 75401 states and 113036 transitions. Word has length 125 [2023-12-02 14:44:02,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:44:02,139 INFO L495 AbstractCegarLoop]: Abstraction has 75401 states and 113036 transitions. [2023-12-02 14:44:02,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 14:44:02,139 INFO L276 IsEmpty]: Start isEmpty. Operand 75401 states and 113036 transitions. [2023-12-02 14:44:02,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-12-02 14:44:02,225 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:44:02,225 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:44:02,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 14:44:02,225 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:44:02,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:44:02,226 INFO L85 PathProgramCache]: Analyzing trace with hash -459135910, now seen corresponding path program 1 times [2023-12-02 14:44:02,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:44:02,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295480396] [2023-12-02 14:44:02,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:44:02,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:44:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:44:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 14:44:02,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:44:02,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295480396] [2023-12-02 14:44:02,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295480396] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:44:02,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:44:02,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 14:44:02,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205431908] [2023-12-02 14:44:02,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:44:02,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:44:02,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:44:02,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:44:02,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:44:02,778 INFO L87 Difference]: Start difference. First operand 75401 states and 113036 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 14:44:08,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:44:08,426 INFO L93 Difference]: Finished difference Result 195405 states and 296078 transitions. [2023-12-02 14:44:08,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 14:44:08,427 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 127 [2023-12-02 14:44:08,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:44:08,939 INFO L225 Difference]: With dead ends: 195405 [2023-12-02 14:44:08,939 INFO L226 Difference]: Without dead ends: 120011 [2023-12-02 14:44:09,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 14:44:09,071 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 697 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:44:09,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [703 Valid, 643 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:44:09,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120011 states. [2023-12-02 14:44:14,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120011 to 112073. [2023-12-02 14:44:14,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112073 states, 95108 states have (on average 1.4286495352651722) internal successors, (135876), 95589 states have internal predecessors, (135876), 12356 states have call successors, (12356), 4608 states have call predecessors, (12356), 4608 states have return successors, (19156), 11876 states have call predecessors, (19156), 12356 states have call successors, (19156) [2023-12-02 14:44:15,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112073 states to 112073 states and 167388 transitions. [2023-12-02 14:44:15,211 INFO L78 Accepts]: Start accepts. Automaton has 112073 states and 167388 transitions. Word has length 127 [2023-12-02 14:44:15,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:44:15,211 INFO L495 AbstractCegarLoop]: Abstraction has 112073 states and 167388 transitions. [2023-12-02 14:44:15,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 14:44:15,211 INFO L276 IsEmpty]: Start isEmpty. Operand 112073 states and 167388 transitions. [2023-12-02 14:44:15,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-12-02 14:44:15,271 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:44:15,271 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:44:15,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 14:44:15,271 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:44:15,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:44:15,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1951607967, now seen corresponding path program 1 times [2023-12-02 14:44:15,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:44:15,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628400428] [2023-12-02 14:44:15,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:44:15,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:44:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:44:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 14:44:15,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:44:15,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628400428] [2023-12-02 14:44:15,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628400428] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:44:15,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:44:15,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 14:44:15,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618305661] [2023-12-02 14:44:15,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:44:15,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:44:15,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:44:15,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:44:15,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:44:15,599 INFO L87 Difference]: Start difference. First operand 112073 states and 167388 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 14:44:24,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:44:24,468 INFO L93 Difference]: Finished difference Result 289197 states and 436862 transitions. [2023-12-02 14:44:24,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 14:44:24,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 129 [2023-12-02 14:44:24,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:44:25,042 INFO L225 Difference]: With dead ends: 289197 [2023-12-02 14:44:25,043 INFO L226 Difference]: Without dead ends: 177131 [2023-12-02 14:44:25,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 14:44:25,204 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 695 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:44:25,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 744 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:44:25,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177131 states. [2023-12-02 14:44:34,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177131 to 166569. [2023-12-02 14:44:34,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166569 states, 141316 states have (on average 1.4232217158708143) internal successors, (201124), 142037 states have internal predecessors, (201124), 18340 states have call successors, (18340), 6912 states have call predecessors, (18340), 6912 states have return successors, (28372), 17620 states have call predecessors, (28372), 18340 states have call successors, (28372) [2023-12-02 14:44:35,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166569 states to 166569 states and 247836 transitions. [2023-12-02 14:44:35,161 INFO L78 Accepts]: Start accepts. Automaton has 166569 states and 247836 transitions. Word has length 129 [2023-12-02 14:44:35,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:44:35,162 INFO L495 AbstractCegarLoop]: Abstraction has 166569 states and 247836 transitions. [2023-12-02 14:44:35,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 14:44:35,162 INFO L276 IsEmpty]: Start isEmpty. Operand 166569 states and 247836 transitions. [2023-12-02 14:44:35,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-12-02 14:44:35,266 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:44:35,266 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:44:35,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 14:44:35,266 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:44:35,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:44:35,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1017176986, now seen corresponding path program 1 times [2023-12-02 14:44:35,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:44:35,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318157023] [2023-12-02 14:44:35,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:44:35,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:44:35,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:44:35,575 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 14:44:35,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:44:35,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318157023] [2023-12-02 14:44:35,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318157023] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:44:35,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:44:35,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 14:44:35,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302711211] [2023-12-02 14:44:35,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:44:35,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:44:35,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:44:35,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:44:35,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:44:35,577 INFO L87 Difference]: Start difference. First operand 166569 states and 247836 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 14:44:53,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:44:53,285 INFO L93 Difference]: Finished difference Result 519853 states and 785246 transitions. [2023-12-02 14:44:53,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 14:44:53,286 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 131 [2023-12-02 14:44:53,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:44:54,583 INFO L225 Difference]: With dead ends: 519853 [2023-12-02 14:44:54,583 INFO L226 Difference]: Without dead ends: 353291 [2023-12-02 14:44:55,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 14:44:55,049 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 717 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:44:55,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 594 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:44:55,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353291 states. [2023-12-02 14:45:13,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353291 to 326217. [2023-12-02 14:45:13,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326217 states, 276868 states have (on average 1.4153892829796149) internal successors, (391876), 278309 states have internal predecessors, (391876), 35524 states have call successors, (35524), 13824 states have call predecessors, (35524), 13824 states have return successors, (54580), 34084 states have call predecessors, (54580), 35524 states have call successors, (54580) [2023-12-02 14:45:15,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326217 states to 326217 states and 481980 transitions. [2023-12-02 14:45:15,395 INFO L78 Accepts]: Start accepts. Automaton has 326217 states and 481980 transitions. Word has length 131 [2023-12-02 14:45:15,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:45:15,395 INFO L495 AbstractCegarLoop]: Abstraction has 326217 states and 481980 transitions. [2023-12-02 14:45:15,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 14:45:15,395 INFO L276 IsEmpty]: Start isEmpty. Operand 326217 states and 481980 transitions. [2023-12-02 14:45:15,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-12-02 14:45:15,584 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:45:15,584 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:15,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 14:45:15,585 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:45:15,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:45:15,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1210137313, now seen corresponding path program 1 times [2023-12-02 14:45:15,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:45:15,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485970543] [2023-12-02 14:45:15,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:45:15,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:45:15,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:45:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 14:45:15,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:45:15,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485970543] [2023-12-02 14:45:15,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485970543] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:45:15,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:45:15,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 14:45:15,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627022957] [2023-12-02 14:45:15,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:45:15,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:45:15,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:45:15,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:45:15,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:45:15,888 INFO L87 Difference]: Start difference. First operand 326217 states and 481980 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 14:45:44,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:45:44,431 INFO L93 Difference]: Finished difference Result 833965 states and 1246622 transitions. [2023-12-02 14:45:44,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 14:45:44,431 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 133 [2023-12-02 14:45:44,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:45:46,366 INFO L225 Difference]: With dead ends: 833965 [2023-12-02 14:45:46,366 INFO L226 Difference]: Without dead ends: 507755 [2023-12-02 14:45:47,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 14:45:47,019 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 690 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:45:47,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [696 Valid, 611 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 14:45:47,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507755 states.