./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/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_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/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_aea5a9f9-69aa-4aad-a792-5d0e9f694290/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 030c097c5e5981a6b9166b6af780aa84c84c48bf3e4236dc73dc256776dad070 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 08:21:31,863 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 08:21:31,927 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 08:21:31,932 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 08:21:31,933 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 08:21:31,956 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 08:21:31,957 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 08:21:31,958 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 08:21:31,958 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 08:21:31,959 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 08:21:31,960 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 08:21:31,960 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 08:21:31,961 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 08:21:31,961 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 08:21:31,962 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 08:21:31,963 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 08:21:31,963 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 08:21:31,964 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 08:21:31,964 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 08:21:31,965 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 08:21:31,965 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 08:21:31,966 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 08:21:31,967 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 08:21:31,967 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 08:21:31,968 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 08:21:31,968 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 08:21:31,969 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 08:21:31,969 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 08:21:31,970 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 08:21:31,970 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 08:21:31,970 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 08:21:31,971 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 08:21:31,971 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 08:21:31,971 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 08:21:31,972 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 08:21:31,972 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 08:21:31,972 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 08:21:31,972 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 08:21:31,973 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 08:21:31,973 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 08:21:31,973 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 08:21:31,974 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 08:21:31,974 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 08:21:31,974 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 08:21:31,974 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 08:21:31,975 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 08:21:31,975 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 08:21:31,975 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_aea5a9f9-69aa-4aad-a792-5d0e9f694290/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 030c097c5e5981a6b9166b6af780aa84c84c48bf3e4236dc73dc256776dad070 [2023-12-02 08:21:32,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 08:21:32,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 08:21:32,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 08:21:32,245 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 08:21:32,246 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 08:21:32,247 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c [2023-12-02 08:21:34,995 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 08:21:35,261 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 08:21:35,261 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c [2023-12-02 08:21:35,282 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/data/58ef23a28/9d49f06990e24b909f2c219d87e89b81/FLAGf0c9636b3 [2023-12-02 08:21:35,298 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/data/58ef23a28/9d49f06990e24b909f2c219d87e89b81 [2023-12-02 08:21:35,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 08:21:35,302 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 08:21:35,304 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 08:21:35,304 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 08:21:35,310 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 08:21:35,311 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:21:35" (1/1) ... [2023-12-02 08:21:35,312 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1258e284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:21:35, skipping insertion in model container [2023-12-02 08:21:35,312 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:21:35" (1/1) ... [2023-12-02 08:21:35,388 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 08:21:35,546 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_aea5a9f9-69aa-4aad-a792-5d0e9f694290/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c[914,927] [2023-12-02 08:21:35,605 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_aea5a9f9-69aa-4aad-a792-5d0e9f694290/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c[7115,7128] [2023-12-02 08:21:35,718 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 08:21:35,734 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 08:21:35,746 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_aea5a9f9-69aa-4aad-a792-5d0e9f694290/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c[914,927] [2023-12-02 08:21:35,764 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_aea5a9f9-69aa-4aad-a792-5d0e9f694290/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c[7115,7128] [2023-12-02 08:21:35,813 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 08:21:35,836 INFO L206 MainTranslator]: Completed translation [2023-12-02 08:21:35,837 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:21:35 WrapperNode [2023-12-02 08:21:35,837 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 08:21:35,838 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 08:21:35,838 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 08:21:35,838 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 08:21:35,844 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:21:35" (1/1) ... [2023-12-02 08:21:35,861 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:21:35" (1/1) ... [2023-12-02 08:21:35,909 INFO L138 Inliner]: procedures = 79, calls = 96, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 1130 [2023-12-02 08:21:35,909 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 08:21:35,910 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 08:21:35,910 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 08:21:35,910 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 08:21:35,918 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:21:35" (1/1) ... [2023-12-02 08:21:35,918 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:21:35" (1/1) ... [2023-12-02 08:21:35,922 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:21:35" (1/1) ... [2023-12-02 08:21:35,922 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:21:35" (1/1) ... [2023-12-02 08:21:35,943 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:21:35" (1/1) ... [2023-12-02 08:21:35,960 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:21:35" (1/1) ... [2023-12-02 08:21:35,965 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:21:35" (1/1) ... [2023-12-02 08:21:35,971 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:21:35" (1/1) ... [2023-12-02 08:21:35,980 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 08:21:35,981 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 08:21:35,981 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 08:21:35,982 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 08:21:35,983 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:21:35" (1/1) ... [2023-12-02 08:21:35,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 08:21:36,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:21:36,016 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 08:21:36,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 08:21:36,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 08:21:36,059 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 08:21:36,059 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 08:21:36,059 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-12-02 08:21:36,059 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-12-02 08:21:36,060 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-12-02 08:21:36,060 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-12-02 08:21:36,060 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-12-02 08:21:36,060 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-12-02 08:21:36,060 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-12-02 08:21:36,061 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-12-02 08:21:36,061 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-12-02 08:21:36,061 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-12-02 08:21:36,061 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-12-02 08:21:36,061 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-12-02 08:21:36,062 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-12-02 08:21:36,062 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-12-02 08:21:36,062 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-12-02 08:21:36,062 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-12-02 08:21:36,062 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-12-02 08:21:36,063 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-12-02 08:21:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-12-02 08:21:36,063 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-12-02 08:21:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 08:21:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-12-02 08:21:36,064 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-12-02 08:21:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-12-02 08:21:36,064 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-12-02 08:21:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 08:21:36,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 08:21:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-12-02 08:21:36,065 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-12-02 08:21:36,213 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 08:21:36,216 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 08:21:37,153 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 08:21:37,705 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 08:21:37,705 INFO L309 CfgBuilder]: Removed 20 assume(true) statements. [2023-12-02 08:21:37,707 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:21:37 BoogieIcfgContainer [2023-12-02 08:21:37,707 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 08:21:37,709 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 08:21:37,709 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 08:21:37,712 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 08:21:37,713 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 08:21:35" (1/3) ... [2023-12-02 08:21:37,713 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a809f3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:21:37, skipping insertion in model container [2023-12-02 08:21:37,713 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:21:35" (2/3) ... [2023-12-02 08:21:37,714 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a809f3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:21:37, skipping insertion in model container [2023-12-02 08:21:37,714 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:21:37" (3/3) ... [2023-12-02 08:21:37,715 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.13.cil-2.c [2023-12-02 08:21:37,734 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 08:21:37,735 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 08:21:37,789 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 08:21:37,795 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;@48d8f570, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 08:21:37,795 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 08:21:37,801 INFO L276 IsEmpty]: Start isEmpty. Operand has 285 states, 227 states have (on average 1.5110132158590308) internal successors, (343), 233 states have internal predecessors, (343), 41 states have call successors, (41), 14 states have call predecessors, (41), 14 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2023-12-02 08:21:37,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 08:21:37,812 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:21:37,812 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 08:21:37,813 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:21:37,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:21:37,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1732518193, now seen corresponding path program 1 times [2023-12-02 08:21:37,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:21:37,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147889940] [2023-12-02 08:21:37,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:21:37,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:21:37,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:21:38,122 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 08:21:38,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:21:38,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147889940] [2023-12-02 08:21:38,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147889940] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:21:38,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:21:38,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 08:21:38,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079349803] [2023-12-02 08:21:38,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:21:38,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 08:21:38,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:21:38,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 08:21:38,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:21:38,156 INFO L87 Difference]: Start difference. First operand has 285 states, 227 states have (on average 1.5110132158590308) internal successors, (343), 233 states have internal predecessors, (343), 41 states have call successors, (41), 14 states have call predecessors, (41), 14 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 08:21:38,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:21:38,637 INFO L93 Difference]: Finished difference Result 621 states and 921 transitions. [2023-12-02 08:21:38,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 08:21:38,640 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 45 [2023-12-02 08:21:38,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:21:38,653 INFO L225 Difference]: With dead ends: 621 [2023-12-02 08:21:38,653 INFO L226 Difference]: Without dead ends: 340 [2023-12-02 08:21:38,659 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 08:21:38,663 INFO L413 NwaCegarLoop]: 402 mSDtfsCounter, 473 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 08:21:38,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 704 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 08:21:38,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-12-02 08:21:38,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 333. [2023-12-02 08:21:38,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 262 states have (on average 1.4351145038167938) internal successors, (376), 266 states have internal predecessors, (376), 49 states have call successors, (49), 21 states have call predecessors, (49), 20 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2023-12-02 08:21:38,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 472 transitions. [2023-12-02 08:21:38,736 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 472 transitions. Word has length 45 [2023-12-02 08:21:38,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:21:38,737 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 472 transitions. [2023-12-02 08:21:38,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 08:21:38,737 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 472 transitions. [2023-12-02 08:21:38,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 08:21:38,740 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:21:38,740 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 08:21:38,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 08:21:38,741 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:21:38,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:21:38,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1643474480, now seen corresponding path program 1 times [2023-12-02 08:21:38,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:21:38,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817816005] [2023-12-02 08:21:38,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:21:38,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:21:38,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:21:38,875 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 08:21:38,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:21:38,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817816005] [2023-12-02 08:21:38,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817816005] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:21:38,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:21:38,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 08:21:38,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627201898] [2023-12-02 08:21:38,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:21:38,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:21:38,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:21:38,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:21:38,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:21:38,880 INFO L87 Difference]: Start difference. First operand 333 states and 472 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 08:21:39,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:21:39,785 INFO L93 Difference]: Finished difference Result 735 states and 975 transitions. [2023-12-02 08:21:39,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 08:21:39,786 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 08:21:39,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:21:39,794 INFO L225 Difference]: With dead ends: 735 [2023-12-02 08:21:39,794 INFO L226 Difference]: Without dead ends: 603 [2023-12-02 08:21:39,795 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 08:21:39,797 INFO L413 NwaCegarLoop]: 458 mSDtfsCounter, 968 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 08:21:39,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [972 Valid, 1180 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 08:21:39,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2023-12-02 08:21:39,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 519. [2023-12-02 08:21:39,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 394 states have (on average 1.3604060913705585) internal successors, (536), 399 states have internal predecessors, (536), 76 states have call successors, (76), 44 states have call predecessors, (76), 47 states have return successors, (78), 77 states have call predecessors, (78), 74 states have call successors, (78) [2023-12-02 08:21:39,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 690 transitions. [2023-12-02 08:21:39,868 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 690 transitions. Word has length 45 [2023-12-02 08:21:39,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:21:39,869 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 690 transitions. [2023-12-02 08:21:39,869 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 08:21:39,869 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 690 transitions. [2023-12-02 08:21:39,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 08:21:39,872 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:21:39,872 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 08:21:39,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 08:21:39,873 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:21:39,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:21:39,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1347693102, now seen corresponding path program 1 times [2023-12-02 08:21:39,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:21:39,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346110320] [2023-12-02 08:21:39,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:21:39,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:21:39,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:21:40,094 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 08:21:40,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:21:40,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346110320] [2023-12-02 08:21:40,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346110320] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:21:40,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:21:40,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 08:21:40,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234816876] [2023-12-02 08:21:40,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:21:40,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 08:21:40,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:21:40,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 08:21:40,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 08:21:40,098 INFO L87 Difference]: Start difference. First operand 519 states and 690 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 08:21:41,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:21:41,036 INFO L93 Difference]: Finished difference Result 1035 states and 1306 transitions. [2023-12-02 08:21:41,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 08:21:41,037 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 08:21:41,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:21:41,043 INFO L225 Difference]: With dead ends: 1035 [2023-12-02 08:21:41,043 INFO L226 Difference]: Without dead ends: 733 [2023-12-02 08:21:41,045 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 08:21:41,046 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 571 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 08:21:41,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 1066 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 08:21:41,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2023-12-02 08:21:41,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 698. [2023-12-02 08:21:41,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 519 states have (on average 1.325626204238921) internal successors, (688), 525 states have internal predecessors, (688), 103 states have call successors, (103), 67 states have call predecessors, (103), 74 states have return successors, (109), 107 states have call predecessors, (109), 101 states have call successors, (109) [2023-12-02 08:21:41,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 900 transitions. [2023-12-02 08:21:41,111 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 900 transitions. Word has length 46 [2023-12-02 08:21:41,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:21:41,111 INFO L495 AbstractCegarLoop]: Abstraction has 698 states and 900 transitions. [2023-12-02 08:21:41,112 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 08:21:41,112 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 900 transitions. [2023-12-02 08:21:41,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 08:21:41,114 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:21:41,114 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 08:21:41,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 08:21:41,115 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:21:41,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:21:41,116 INFO L85 PathProgramCache]: Analyzing trace with hash -488741521, now seen corresponding path program 1 times [2023-12-02 08:21:41,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:21:41,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588697618] [2023-12-02 08:21:41,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:21:41,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:21:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:21:41,177 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 08:21:41,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:21:41,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588697618] [2023-12-02 08:21:41,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588697618] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:21:41,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:21:41,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:21:41,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923770700] [2023-12-02 08:21:41,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:21:41,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:21:41,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:21:41,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:21:41,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:21:41,180 INFO L87 Difference]: Start difference. First operand 698 states and 900 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 08:21:41,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:21:41,368 INFO L93 Difference]: Finished difference Result 1262 states and 1570 transitions. [2023-12-02 08:21:41,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:21:41,369 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 08:21:41,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:21:41,375 INFO L225 Difference]: With dead ends: 1262 [2023-12-02 08:21:41,375 INFO L226 Difference]: Without dead ends: 830 [2023-12-02 08:21:41,376 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 08:21:41,378 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 67 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:21:41,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 671 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:21:41,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2023-12-02 08:21:41,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 725. [2023-12-02 08:21:41,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 542 states have (on average 1.3154981549815499) internal successors, (713), 548 states have internal predecessors, (713), 105 states have call successors, (105), 69 states have call predecessors, (105), 76 states have return successors, (111), 109 states have call predecessors, (111), 103 states have call successors, (111) [2023-12-02 08:21:41,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 929 transitions. [2023-12-02 08:21:41,452 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 929 transitions. Word has length 47 [2023-12-02 08:21:41,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:21:41,453 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 929 transitions. [2023-12-02 08:21:41,453 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 08:21:41,453 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 929 transitions. [2023-12-02 08:21:41,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-02 08:21:41,456 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:21:41,456 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:21:41,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 08:21:41,456 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:21:41,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:21:41,457 INFO L85 PathProgramCache]: Analyzing trace with hash -395619405, now seen corresponding path program 1 times [2023-12-02 08:21:41,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:21:41,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928192613] [2023-12-02 08:21:41,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:21:41,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:21:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:21:41,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 08:21:41,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:21:41,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928192613] [2023-12-02 08:21:41,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928192613] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:21:41,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:21:41,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:21:41,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223879521] [2023-12-02 08:21:41,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:21:41,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:21:41,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:21:41,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:21:41,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:21:41,517 INFO L87 Difference]: Start difference. First operand 725 states and 929 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 08:21:41,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:21:41,666 INFO L93 Difference]: Finished difference Result 915 states and 1150 transitions. [2023-12-02 08:21:41,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:21:41,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 53 [2023-12-02 08:21:41,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:21:41,672 INFO L225 Difference]: With dead ends: 915 [2023-12-02 08:21:41,672 INFO L226 Difference]: Without dead ends: 642 [2023-12-02 08:21:41,673 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 08:21:41,674 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 378 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:21:41,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 414 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:21:41,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2023-12-02 08:21:41,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 533. [2023-12-02 08:21:41,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 402 states have (on average 1.3208955223880596) internal successors, (531), 406 states have internal predecessors, (531), 81 states have call successors, (81), 49 states have call predecessors, (81), 48 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2023-12-02 08:21:41,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 691 transitions. [2023-12-02 08:21:41,712 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 691 transitions. Word has length 53 [2023-12-02 08:21:41,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:21:41,713 INFO L495 AbstractCegarLoop]: Abstraction has 533 states and 691 transitions. [2023-12-02 08:21:41,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 08:21:41,713 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 691 transitions. [2023-12-02 08:21:41,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-02 08:21:41,715 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:21:41,716 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:21:41,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 08:21:41,716 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:21:41,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:21:41,717 INFO L85 PathProgramCache]: Analyzing trace with hash 737710284, now seen corresponding path program 1 times [2023-12-02 08:21:41,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:21:41,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333828021] [2023-12-02 08:21:41,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:21:41,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:21:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:21:41,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:21:41,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:21:41,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333828021] [2023-12-02 08:21:41,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333828021] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:21:41,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:21:41,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 08:21:41,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868158840] [2023-12-02 08:21:41,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:21:41,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 08:21:41,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:21:41,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 08:21:41,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:21:41,825 INFO L87 Difference]: Start difference. First operand 533 states and 691 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-02 08:21:42,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:21:42,217 INFO L93 Difference]: Finished difference Result 636 states and 807 transitions. [2023-12-02 08:21:42,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 08:21:42,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2023-12-02 08:21:42,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:21:42,222 INFO L225 Difference]: With dead ends: 636 [2023-12-02 08:21:42,222 INFO L226 Difference]: Without dead ends: 633 [2023-12-02 08:21:42,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 08:21:42,224 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 689 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 08:21:42,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 385 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 08:21:42,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2023-12-02 08:21:42,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 532. [2023-12-02 08:21:42,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 402 states have (on average 1.3134328358208955) internal successors, (528), 405 states have internal predecessors, (528), 80 states have call successors, (80), 49 states have call predecessors, (80), 48 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2023-12-02 08:21:42,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 687 transitions. [2023-12-02 08:21:42,265 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 687 transitions. Word has length 54 [2023-12-02 08:21:42,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:21:42,265 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 687 transitions. [2023-12-02 08:21:42,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-02 08:21:42,266 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 687 transitions. [2023-12-02 08:21:42,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 08:21:42,267 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:21:42,267 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:21:42,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 08:21:42,268 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:21:42,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:21:42,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1392661720, now seen corresponding path program 1 times [2023-12-02 08:21:42,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:21:42,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016077395] [2023-12-02 08:21:42,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:21:42,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:21:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:21:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:21:42,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:21:42,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016077395] [2023-12-02 08:21:42,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016077395] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:21:42,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380580503] [2023-12-02 08:21:42,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:21:42,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:21:42,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:21:42,408 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:21:42,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 08:21:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:21:42,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 08:21:42,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:21:42,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:21:42,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:21:42,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:21:42,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380580503] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:21:42,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [87090701] [2023-12-02 08:21:42,927 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-12-02 08:21:42,928 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:21:42,931 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:21:42,935 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:21:42,936 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:21:50,554 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 221 for LOIs [2023-12-02 08:21:50,662 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 217 for LOIs [2023-12-02 08:21:50,770 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 225 for LOIs [2023-12-02 08:21:52,487 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 221 for LOIs [2023-12-02 08:21:52,824 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 221 for LOIs [2023-12-02 08:21:53,166 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 221 for LOIs [2023-12-02 08:21:53,278 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 228 for LOIs [2023-12-02 08:21:53,392 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:22:21,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [87090701] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:22:21,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:22:21,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [5, 5, 4] total 41 [2023-12-02 08:22:21,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528763455] [2023-12-02 08:22:21,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:22:21,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-02 08:22:21,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:22:21,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-02 08:22:21,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 08:22:21,630 INFO L87 Difference]: Start difference. First operand 532 states and 687 transitions. Second operand has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 08:23:01,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:23:01,231 INFO L93 Difference]: Finished difference Result 896 states and 1098 transitions. [2023-12-02 08:23:01,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-02 08:23:01,232 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2023-12-02 08:23:01,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:23:01,235 INFO L225 Difference]: With dead ends: 896 [2023-12-02 08:23:01,235 INFO L226 Difference]: Without dead ends: 581 [2023-12-02 08:23:01,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 53.7s TimeCoverageRelationStatistics Valid=601, Invalid=4091, Unknown=0, NotChecked=0, Total=4692 [2023-12-02 08:23:01,237 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 183 mSDsluCounter, 2637 mSDsCounter, 0 mSdLazyCounter, 6604 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 2953 SdHoareTripleChecker+Invalid, 6754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 6604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2023-12-02 08:23:01,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 2953 Invalid, 6754 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [150 Valid, 6604 Invalid, 0 Unknown, 0 Unchecked, 13.8s Time] [2023-12-02 08:23:01,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2023-12-02 08:23:01,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 566. [2023-12-02 08:23:01,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 428 states have (on average 1.2990654205607477) internal successors, (556), 431 states have internal predecessors, (556), 82 states have call successors, (82), 55 states have call predecessors, (82), 54 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2023-12-02 08:23:01,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 719 transitions. [2023-12-02 08:23:01,315 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 719 transitions. Word has length 55 [2023-12-02 08:23:01,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:23:01,315 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 719 transitions. [2023-12-02 08:23:01,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 08:23:01,316 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 719 transitions. [2023-12-02 08:23:01,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-02 08:23:01,317 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:23:01,317 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:23:01,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 08:23:01,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 08:23:01,518 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:23:01,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:23:01,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1236429488, now seen corresponding path program 1 times [2023-12-02 08:23:01,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:23:01,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105824682] [2023-12-02 08:23:01,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:23:01,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:23:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:23:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 08:23:01,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:23:01,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105824682] [2023-12-02 08:23:01,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105824682] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:23:01,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:23:01,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:23:01,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611171555] [2023-12-02 08:23:01,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:23:01,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:23:01,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:23:01,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:23:01,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:23:01,580 INFO L87 Difference]: Start difference. First operand 566 states and 719 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 08:23:01,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:23:01,828 INFO L93 Difference]: Finished difference Result 847 states and 1041 transitions. [2023-12-02 08:23:01,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:23:01,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2023-12-02 08:23:01,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:23:01,832 INFO L225 Difference]: With dead ends: 847 [2023-12-02 08:23:01,832 INFO L226 Difference]: Without dead ends: 678 [2023-12-02 08:23:01,833 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 08:23:01,833 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 42 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:23:01,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 717 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:23:01,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2023-12-02 08:23:01,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 601. [2023-12-02 08:23:01,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 457 states have (on average 1.2954048140043763) internal successors, (592), 460 states have internal predecessors, (592), 85 states have call successors, (85), 58 states have call predecessors, (85), 57 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2023-12-02 08:23:01,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 761 transitions. [2023-12-02 08:23:01,913 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 761 transitions. Word has length 61 [2023-12-02 08:23:01,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:23:01,913 INFO L495 AbstractCegarLoop]: Abstraction has 601 states and 761 transitions. [2023-12-02 08:23:01,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 08:23:01,914 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 761 transitions. [2023-12-02 08:23:01,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-02 08:23:01,915 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:23:01,915 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:23:01,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 08:23:01,915 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:23:01,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:23:01,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1161530474, now seen corresponding path program 1 times [2023-12-02 08:23:01,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:23:01,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101013898] [2023-12-02 08:23:01,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:23:01,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:23:01,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:23:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 08:23:02,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:23:02,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101013898] [2023-12-02 08:23:02,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101013898] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:23:02,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:23:02,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 08:23:02,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197823872] [2023-12-02 08:23:02,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:23:02,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 08:23:02,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:23:02,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 08:23:02,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 08:23:02,050 INFO L87 Difference]: Start difference. First operand 601 states and 761 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 08:23:02,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:23:02,932 INFO L93 Difference]: Finished difference Result 1064 states and 1287 transitions. [2023-12-02 08:23:02,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 08:23:02,932 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 63 [2023-12-02 08:23:02,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:23:02,937 INFO L225 Difference]: With dead ends: 1064 [2023-12-02 08:23:02,937 INFO L226 Difference]: Without dead ends: 761 [2023-12-02 08:23:02,938 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 08:23:02,939 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 555 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 08:23:02,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 1196 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 08:23:02,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2023-12-02 08:23:03,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 740. [2023-12-02 08:23:03,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 551 states have (on average 1.2613430127041743) internal successors, (695), 554 states have internal predecessors, (695), 109 states have call successors, (109), 79 states have call predecessors, (109), 78 states have return successors, (108), 108 states have call predecessors, (108), 108 states have call successors, (108) [2023-12-02 08:23:03,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 912 transitions. [2023-12-02 08:23:03,067 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 912 transitions. Word has length 63 [2023-12-02 08:23:03,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:23:03,068 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 912 transitions. [2023-12-02 08:23:03,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 08:23:03,068 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 912 transitions. [2023-12-02 08:23:03,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-02 08:23:03,070 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:23:03,070 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 08:23:03,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 08:23:03,070 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:23:03,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:23:03,071 INFO L85 PathProgramCache]: Analyzing trace with hash -364326042, now seen corresponding path program 1 times [2023-12-02 08:23:03,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:23:03,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218017295] [2023-12-02 08:23:03,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:23:03,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:23:03,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:23:03,194 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 08:23:03,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:23:03,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218017295] [2023-12-02 08:23:03,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218017295] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:23:03,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343510506] [2023-12-02 08:23:03,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:23:03,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:23:03,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:23:03,196 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:23:03,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 08:23:03,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:23:03,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 08:23:03,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:23:03,506 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 08:23:03,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:23:03,578 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 08:23:03,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343510506] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:23:03,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1181334721] [2023-12-02 08:23:03,581 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-12-02 08:23:03,581 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:23:03,582 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:23:03,582 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:23:03,582 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:23:26,086 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 221 for LOIs [2023-12-02 08:23:26,194 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 220 for LOIs [2023-12-02 08:23:26,941 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 188 for LOIs [2023-12-02 08:23:27,625 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 225 for LOIs [2023-12-02 08:23:29,257 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 221 for LOIs [2023-12-02 08:23:29,593 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 221 for LOIs [2023-12-02 08:23:29,941 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 221 for LOIs [2023-12-02 08:23:30,055 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 228 for LOIs [2023-12-02 08:23:30,168 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:24:07,247 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18587#(and (= ~q_req_up~0 1) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_5| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_5| 0)) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_5| 2147483648)) (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_5| 2147483647))) (= ~q_free~0 1) (exists ((|v_ULTIMATE.start_start_simulation1_~kernel_st~0#1_BEFORE_CALL_30| Int) (v_~c_last_read~0_10 Int) (|v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_1| Int) (v_~q_free~0_42 Int)) (and (= ~E_12~0 2) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (not (= ~p_dw_st~0 0)) (<= 1 |#StackHeapBarrier|) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= v_~c_last_read~0_10 0) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_1|) (= |v_ULTIMATE.start_start_simulation1_~kernel_st~0#1_BEFORE_CALL_30| 1) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_13~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~t13_st~0 0) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (= ~t11_pc~0 0) (= ~T12_E~0 2) (= ~t11_i~0 0) (= ~T13_E~0 2) (= ~t12_pc~0 0) (= ~E_2~0 2) (not (= v_~q_free~0_42 1)) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~t13_i~0 0) (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_1| 0)) (= ~token~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_1| 1) (= ~t12_st~0 0) (= 0 ~t4_pc~0) (= ~t13_pc~0 0) (= ~t11_st~0 0) (<= v_~q_free~0_42 1) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (= ~E_9~0 2) (= ~t1_i~0 0))) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (= ~c_dr_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (= ~c_dr_st~0 1))' at error location [2023-12-02 08:24:07,247 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:24:07,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:24:07,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-12-02 08:24:07,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677172654] [2023-12-02 08:24:07,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 08:24:07,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 08:24:07,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:24:07,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 08:24:07,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1915, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 08:24:07,250 INFO L87 Difference]: Start difference. First operand 740 states and 912 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-12-02 08:24:07,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:24:07,907 INFO L93 Difference]: Finished difference Result 1834 states and 2153 transitions. [2023-12-02 08:24:07,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 08:24:07,908 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2023-12-02 08:24:07,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:24:07,917 INFO L225 Difference]: With dead ends: 1834 [2023-12-02 08:24:07,918 INFO L226 Difference]: Without dead ends: 1831 [2023-12-02 08:24:07,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 148 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 37.1s TimeCoverageRelationStatistics Valid=247, Invalid=1915, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 08:24:07,920 INFO L413 NwaCegarLoop]: 434 mSDtfsCounter, 887 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 08:24:07,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [887 Valid, 1387 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 08:24:07,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2023-12-02 08:24:08,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1254. [2023-12-02 08:24:08,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 907 states have (on average 1.2282249173098125) internal successors, (1114), 910 states have internal predecessors, (1114), 193 states have call successors, (193), 153 states have call predecessors, (193), 152 states have return successors, (192), 192 states have call predecessors, (192), 192 states have call successors, (192) [2023-12-02 08:24:08,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1499 transitions. [2023-12-02 08:24:08,074 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1499 transitions. Word has length 64 [2023-12-02 08:24:08,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:24:08,074 INFO L495 AbstractCegarLoop]: Abstraction has 1254 states and 1499 transitions. [2023-12-02 08:24:08,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-12-02 08:24:08,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1499 transitions. [2023-12-02 08:24:08,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-02 08:24:08,076 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:24:08,076 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:24:08,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 08:24:08,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 08:24:08,277 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:24:08,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:24:08,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1585519730, now seen corresponding path program 2 times [2023-12-02 08:24:08,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:24:08,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719952246] [2023-12-02 08:24:08,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:24:08,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:24:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:24:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 08:24:08,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:24:08,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719952246] [2023-12-02 08:24:08,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719952246] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:24:08,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:24:08,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:24:08,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236903515] [2023-12-02 08:24:08,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:24:08,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:24:08,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:24:08,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:24:08,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:24:08,310 INFO L87 Difference]: Start difference. First operand 1254 states and 1499 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 08:24:08,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:24:08,589 INFO L93 Difference]: Finished difference Result 2006 states and 2355 transitions. [2023-12-02 08:24:08,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:24:08,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2023-12-02 08:24:08,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:24:08,596 INFO L225 Difference]: With dead ends: 2006 [2023-12-02 08:24:08,596 INFO L226 Difference]: Without dead ends: 1250 [2023-12-02 08:24:08,598 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 08:24:08,599 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 381 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:24:08,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 450 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:24:08,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2023-12-02 08:24:08,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1239. [2023-12-02 08:24:08,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 892 states have (on average 1.2152466367713004) internal successors, (1084), 895 states have internal predecessors, (1084), 193 states have call successors, (193), 153 states have call predecessors, (193), 152 states have return successors, (192), 192 states have call predecessors, (192), 192 states have call successors, (192) [2023-12-02 08:24:08,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1469 transitions. [2023-12-02 08:24:08,825 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1469 transitions. Word has length 67 [2023-12-02 08:24:08,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:24:08,825 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 1469 transitions. [2023-12-02 08:24:08,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 08:24:08,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1469 transitions. [2023-12-02 08:24:08,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-02 08:24:08,827 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:24:08,828 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-02 08:24:08,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 08:24:08,828 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:24:08,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:24:08,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1237579622, now seen corresponding path program 1 times [2023-12-02 08:24:08,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:24:08,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689210134] [2023-12-02 08:24:08,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:24:08,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:24:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:24:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 08:24:08,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:24:08,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689210134] [2023-12-02 08:24:08,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689210134] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:24:08,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:24:08,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:24:08,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496237819] [2023-12-02 08:24:08,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:24:08,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:24:08,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:24:08,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:24:08,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:24:08,886 INFO L87 Difference]: Start difference. First operand 1239 states and 1469 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 08:24:09,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:24:09,271 INFO L93 Difference]: Finished difference Result 2205 states and 2563 transitions. [2023-12-02 08:24:09,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:24:09,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2023-12-02 08:24:09,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:24:09,279 INFO L225 Difference]: With dead ends: 2205 [2023-12-02 08:24:09,279 INFO L226 Difference]: Without dead ends: 1415 [2023-12-02 08:24:09,281 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 08:24:09,282 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 37 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:24:09,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 708 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:24:09,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2023-12-02 08:24:09,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1286. [2023-12-02 08:24:09,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 931 states have (on average 1.21374865735768) internal successors, (1130), 934 states have internal predecessors, (1130), 197 states have call successors, (197), 157 states have call predecessors, (197), 156 states have return successors, (196), 196 states have call predecessors, (196), 196 states have call successors, (196) [2023-12-02 08:24:09,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 1523 transitions. [2023-12-02 08:24:09,536 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 1523 transitions. Word has length 71 [2023-12-02 08:24:09,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:24:09,537 INFO L495 AbstractCegarLoop]: Abstraction has 1286 states and 1523 transitions. [2023-12-02 08:24:09,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 08:24:09,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 1523 transitions. [2023-12-02 08:24:09,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-02 08:24:09,539 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:24:09,539 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:24:09,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 08:24:09,539 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:24:09,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:24:09,539 INFO L85 PathProgramCache]: Analyzing trace with hash -704652036, now seen corresponding path program 1 times [2023-12-02 08:24:09,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:24:09,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20219831] [2023-12-02 08:24:09,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:24:09,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:24:09,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:24:09,664 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 08:24:09,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:24:09,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20219831] [2023-12-02 08:24:09,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20219831] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:24:09,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:24:09,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 08:24:09,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934428778] [2023-12-02 08:24:09,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:24:09,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 08:24:09,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:24:09,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 08:24:09,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 08:24:09,666 INFO L87 Difference]: Start difference. First operand 1286 states and 1523 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 08:24:10,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:24:10,606 INFO L93 Difference]: Finished difference Result 2289 states and 3149 transitions. [2023-12-02 08:24:10,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 08:24:10,607 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 70 [2023-12-02 08:24:10,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:24:10,616 INFO L225 Difference]: With dead ends: 2289 [2023-12-02 08:24:10,616 INFO L226 Difference]: Without dead ends: 2083 [2023-12-02 08:24:10,618 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 08:24:10,619 INFO L413 NwaCegarLoop]: 577 mSDtfsCounter, 1615 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1617 SdHoareTripleChecker+Valid, 1511 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 08:24:10,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1617 Valid, 1511 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 08:24:10,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2023-12-02 08:24:10,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 2072. [2023-12-02 08:24:10,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 1604 states have (on average 1.3291770573566084) internal successors, (2132), 1610 states have internal predecessors, (2132), 286 states have call successors, (286), 181 states have call predecessors, (286), 180 states have return successors, (351), 282 states have call predecessors, (351), 285 states have call successors, (351) [2023-12-02 08:24:10,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 2769 transitions. [2023-12-02 08:24:10,858 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 2769 transitions. Word has length 70 [2023-12-02 08:24:10,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:24:10,858 INFO L495 AbstractCegarLoop]: Abstraction has 2072 states and 2769 transitions. [2023-12-02 08:24:10,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 08:24:10,858 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 2769 transitions. [2023-12-02 08:24:10,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-02 08:24:10,860 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:24:10,861 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:24:10,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 08:24:10,861 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:24:10,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:24:10,861 INFO L85 PathProgramCache]: Analyzing trace with hash 699827919, now seen corresponding path program 1 times [2023-12-02 08:24:10,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:24:10,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241077280] [2023-12-02 08:24:10,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:24:10,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:24:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:24:11,131 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 08:24:11,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:24:11,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241077280] [2023-12-02 08:24:11,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241077280] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:24:11,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680007036] [2023-12-02 08:24:11,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:24:11,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:24:11,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:24:11,133 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:24:11,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 08:24:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:24:11,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 08:24:11,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:24:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 08:24:11,321 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:24:11,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680007036] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:24:11,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:24:11,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2023-12-02 08:24:11,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525609866] [2023-12-02 08:24:11,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:24:11,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:24:11,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:24:11,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:24:11,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-12-02 08:24:11,323 INFO L87 Difference]: Start difference. First operand 2072 states and 2769 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 08:24:11,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:24:11,800 INFO L93 Difference]: Finished difference Result 2934 states and 3773 transitions. [2023-12-02 08:24:11,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 08:24:11,801 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2023-12-02 08:24:11,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:24:11,809 INFO L225 Difference]: With dead ends: 2934 [2023-12-02 08:24:11,809 INFO L226 Difference]: Without dead ends: 1887 [2023-12-02 08:24:11,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-12-02 08:24:11,812 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 375 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 1457 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:24:11,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 1457 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:24:11,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2023-12-02 08:24:11,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1702. [2023-12-02 08:24:12,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1366 states have (on average 1.362371888726208) internal successors, (1861), 1372 states have internal predecessors, (1861), 215 states have call successors, (215), 120 states have call predecessors, (215), 119 states have return successors, (280), 211 states have call predecessors, (280), 214 states have call successors, (280) [2023-12-02 08:24:12,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 2356 transitions. [2023-12-02 08:24:12,005 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 2356 transitions. Word has length 102 [2023-12-02 08:24:12,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:24:12,006 INFO L495 AbstractCegarLoop]: Abstraction has 1702 states and 2356 transitions. [2023-12-02 08:24:12,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 08:24:12,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 2356 transitions. [2023-12-02 08:24:12,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-02 08:24:12,008 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:24:12,008 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 08:24:12,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 08:24:12,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 08:24:12,212 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:24:12,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:24:12,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1606268435, now seen corresponding path program 1 times [2023-12-02 08:24:12,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:24:12,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466611376] [2023-12-02 08:24:12,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:24:12,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:24:12,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:24:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 08:24:12,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:24:12,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466611376] [2023-12-02 08:24:12,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466611376] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:24:12,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513551070] [2023-12-02 08:24:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:24:12,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:24:12,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:24:12,380 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:24:12,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 08:24:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:24:12,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 08:24:12,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:24:12,609 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 08:24:12,609 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:24:12,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513551070] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:24:12,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:24:12,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-12-02 08:24:12,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657316458] [2023-12-02 08:24:12,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:24:12,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 08:24:12,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:24:12,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 08:24:12,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-12-02 08:24:12,611 INFO L87 Difference]: Start difference. First operand 1702 states and 2356 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 08:24:13,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:24:13,100 INFO L93 Difference]: Finished difference Result 2251 states and 2981 transitions. [2023-12-02 08:24:13,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 08:24:13,101 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2023-12-02 08:24:13,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:24:13,108 INFO L225 Difference]: With dead ends: 2251 [2023-12-02 08:24:13,108 INFO L226 Difference]: Without dead ends: 1658 [2023-12-02 08:24:13,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-12-02 08:24:13,111 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 62 mSDsluCounter, 1446 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1830 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:24:13,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1830 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:24:13,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2023-12-02 08:24:13,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1566. [2023-12-02 08:24:13,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1266 states have (on average 1.377567140600316) internal successors, (1744), 1272 states have internal predecessors, (1744), 196 states have call successors, (196), 103 states have call predecessors, (196), 102 states have return successors, (261), 192 states have call predecessors, (261), 195 states have call successors, (261) [2023-12-02 08:24:13,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 2201 transitions. [2023-12-02 08:24:13,294 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 2201 transitions. Word has length 112 [2023-12-02 08:24:13,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:24:13,294 INFO L495 AbstractCegarLoop]: Abstraction has 1566 states and 2201 transitions. [2023-12-02 08:24:13,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 08:24:13,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 2201 transitions. [2023-12-02 08:24:13,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 08:24:13,296 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:24:13,297 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:24:13,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 08:24:13,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 08:24:13,498 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:24:13,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:24:13,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1881105520, now seen corresponding path program 1 times [2023-12-02 08:24:13,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:24:13,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679321354] [2023-12-02 08:24:13,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:24:13,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:24:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:24:13,645 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-02 08:24:13,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:24:13,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679321354] [2023-12-02 08:24:13,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679321354] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:24:13,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930727063] [2023-12-02 08:24:13,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:24:13,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:24:13,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:24:13,647 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:24:13,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 08:24:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:24:13,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 08:24:13,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:24:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 08:24:13,864 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:24:13,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930727063] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:24:13,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:24:13,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2023-12-02 08:24:13,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372248241] [2023-12-02 08:24:13,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:24:13,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:24:13,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:24:13,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:24:13,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 08:24:13,866 INFO L87 Difference]: Start difference. First operand 1566 states and 2201 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 08:24:14,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:24:14,290 INFO L93 Difference]: Finished difference Result 2315 states and 3046 transitions. [2023-12-02 08:24:14,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 08:24:14,291 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2023-12-02 08:24:14,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:24:14,299 INFO L225 Difference]: With dead ends: 2315 [2023-12-02 08:24:14,299 INFO L226 Difference]: Without dead ends: 1858 [2023-12-02 08:24:14,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-12-02 08:24:14,301 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 361 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 1564 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:24:14,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 1564 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:24:14,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2023-12-02 08:24:14,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1824. [2023-12-02 08:24:14,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1824 states, 1428 states have (on average 1.3473389355742298) internal successors, (1924), 1440 states have internal predecessors, (1924), 244 states have call successors, (244), 145 states have call predecessors, (244), 150 states have return successors, (321), 240 states have call predecessors, (321), 243 states have call successors, (321) [2023-12-02 08:24:14,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 2489 transitions. [2023-12-02 08:24:14,584 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 2489 transitions. Word has length 113 [2023-12-02 08:24:14,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:24:14,585 INFO L495 AbstractCegarLoop]: Abstraction has 1824 states and 2489 transitions. [2023-12-02 08:24:14,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 08:24:14,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 2489 transitions. [2023-12-02 08:24:14,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-02 08:24:14,589 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:24:14,589 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:24:14,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 08:24:14,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:24:14,790 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:24:14,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:24:14,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1871876393, now seen corresponding path program 1 times [2023-12-02 08:24:14,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:24:14,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010113611] [2023-12-02 08:24:14,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:24:14,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:24:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:24:15,664 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 08:24:15,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:24:15,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010113611] [2023-12-02 08:24:15,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010113611] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:24:15,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091675394] [2023-12-02 08:24:15,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:24:15,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:24:15,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:24:15,665 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:24:15,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 08:24:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:24:15,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 59 conjunts are in the unsatisfiable core [2023-12-02 08:24:15,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:24:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 08:24:16,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:24:18,119 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 08:24:18,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091675394] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:24:18,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [485022063] [2023-12-02 08:24:18,122 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2023-12-02 08:24:18,122 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:24:18,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:24:18,122 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:24:18,122 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:25:30,696 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 7 for LOIs [2023-12-02 08:25:30,698 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 13 for LOIs [2023-12-02 08:25:30,699 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2023-12-02 08:25:30,702 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 234 for LOIs [2023-12-02 08:25:33,169 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 235 for LOIs [2023-12-02 08:25:35,329 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 16 for LOIs [2023-12-02 08:25:35,350 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 228 for LOIs [2023-12-02 08:25:35,747 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 239 for LOIs [2023-12-02 08:25:36,290 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:25:49,975 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '55478#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~p_last_write~0))' at error location [2023-12-02 08:25:49,975 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:25:49,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:25:49,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 17, 16] total 55 [2023-12-02 08:25:49,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81989523] [2023-12-02 08:25:49,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 08:25:49,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-12-02 08:25:49,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:25:49,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-12-02 08:25:49,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=872, Invalid=10900, Unknown=0, NotChecked=0, Total=11772 [2023-12-02 08:25:49,981 INFO L87 Difference]: Start difference. First operand 1824 states and 2489 transitions. Second operand has 55 states, 35 states have (on average 5.6) internal successors, (196), 39 states have internal predecessors, (196), 20 states have call successors, (44), 16 states have call predecessors, (44), 23 states have return successors, (46), 20 states have call predecessors, (46), 20 states have call successors, (46) [2023-12-02 08:26:07,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:26:07,936 INFO L93 Difference]: Finished difference Result 4729 states and 6038 transitions. [2023-12-02 08:26:07,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 283 states. [2023-12-02 08:26:07,937 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 35 states have (on average 5.6) internal successors, (196), 39 states have internal predecessors, (196), 20 states have call successors, (44), 16 states have call predecessors, (44), 23 states have return successors, (46), 20 states have call predecessors, (46), 20 states have call successors, (46) Word has length 114 [2023-12-02 08:26:07,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:26:07,959 INFO L225 Difference]: With dead ends: 4729 [2023-12-02 08:26:07,959 INFO L226 Difference]: Without dead ends: 4014 [2023-12-02 08:26:07,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 681 GetRequests, 293 SyntacticMatches, 3 SemanticMatches, 385 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 61245 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=13490, Invalid=135892, Unknown=0, NotChecked=0, Total=149382 [2023-12-02 08:26:07,996 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 6630 mSDsluCounter, 4116 mSDsCounter, 0 mSdLazyCounter, 7601 mSolverCounterSat, 2736 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6630 SdHoareTripleChecker+Valid, 4428 SdHoareTripleChecker+Invalid, 10337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2736 IncrementalHoareTripleChecker+Valid, 7601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-12-02 08:26:07,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6630 Valid, 4428 Invalid, 10337 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2736 Valid, 7601 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-12-02 08:26:08,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4014 states. [2023-12-02 08:26:08,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4014 to 2100. [2023-12-02 08:26:08,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2100 states, 1612 states have (on average 1.3244416873449132) internal successors, (2135), 1626 states have internal predecessors, (2135), 289 states have call successors, (289), 182 states have call predecessors, (289), 197 states have return successors, (378), 293 states have call predecessors, (378), 288 states have call successors, (378) [2023-12-02 08:26:08,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2100 states to 2100 states and 2802 transitions. [2023-12-02 08:26:08,473 INFO L78 Accepts]: Start accepts. Automaton has 2100 states and 2802 transitions. Word has length 114 [2023-12-02 08:26:08,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:26:08,473 INFO L495 AbstractCegarLoop]: Abstraction has 2100 states and 2802 transitions. [2023-12-02 08:26:08,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 35 states have (on average 5.6) internal successors, (196), 39 states have internal predecessors, (196), 20 states have call successors, (44), 16 states have call predecessors, (44), 23 states have return successors, (46), 20 states have call predecessors, (46), 20 states have call successors, (46) [2023-12-02 08:26:08,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2100 states and 2802 transitions. [2023-12-02 08:26:08,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-12-02 08:26:08,477 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:26:08,477 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:26:08,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 08:26:08,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:26:08,683 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:26:08,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:26:08,684 INFO L85 PathProgramCache]: Analyzing trace with hash -731777959, now seen corresponding path program 1 times [2023-12-02 08:26:08,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:26:08,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264536819] [2023-12-02 08:26:08,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:26:08,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:26:08,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:26:08,989 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 08:26:08,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:26:08,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264536819] [2023-12-02 08:26:08,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264536819] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:26:08,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099267732] [2023-12-02 08:26:08,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:26:08,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:26:08,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:26:08,991 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:26:08,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 08:26:09,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:26:09,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 08:26:09,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:26:09,187 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 08:26:09,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:26:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 08:26:09,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099267732] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 08:26:09,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:26:09,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2023-12-02 08:26:09,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913561356] [2023-12-02 08:26:09,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:26:09,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 08:26:09,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:26:09,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 08:26:09,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2023-12-02 08:26:09,350 INFO L87 Difference]: Start difference. First operand 2100 states and 2802 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 08:26:10,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:26:10,370 INFO L93 Difference]: Finished difference Result 3424 states and 4350 transitions. [2023-12-02 08:26:10,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 08:26:10,371 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2023-12-02 08:26:10,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:26:10,381 INFO L225 Difference]: With dead ends: 3424 [2023-12-02 08:26:10,381 INFO L226 Difference]: Without dead ends: 2433 [2023-12-02 08:26:10,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2023-12-02 08:26:10,383 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 550 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 08:26:10,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 999 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1135 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 08:26:10,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2023-12-02 08:26:10,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 2180. [2023-12-02 08:26:10,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2180 states, 1657 states have (on average 1.31925165962583) internal successors, (2186), 1674 states have internal predecessors, (2186), 308 states have call successors, (308), 191 states have call predecessors, (308), 213 states have return successors, (418), 316 states have call predecessors, (418), 307 states have call successors, (418) [2023-12-02 08:26:10,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2180 states to 2180 states and 2912 transitions. [2023-12-02 08:26:10,706 INFO L78 Accepts]: Start accepts. Automaton has 2180 states and 2912 transitions. Word has length 115 [2023-12-02 08:26:10,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:26:10,707 INFO L495 AbstractCegarLoop]: Abstraction has 2180 states and 2912 transitions. [2023-12-02 08:26:10,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 08:26:10,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2180 states and 2912 transitions. [2023-12-02 08:26:10,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-02 08:26:10,712 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:26:10,712 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1] [2023-12-02 08:26:10,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 08:26:10,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 08:26:10,913 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:26:10,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:26:10,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1042930597, now seen corresponding path program 1 times [2023-12-02 08:26:10,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:26:10,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348592827] [2023-12-02 08:26:10,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:26:10,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:26:10,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:26:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 08:26:11,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:26:11,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348592827] [2023-12-02 08:26:11,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348592827] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:26:11,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135543879] [2023-12-02 08:26:11,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:26:11,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:26:11,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:26:11,554 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:26:11,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 08:26:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:26:11,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 62 conjunts are in the unsatisfiable core [2023-12-02 08:26:11,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:26:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 08:26:12,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:26:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 08:26:13,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135543879] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:26:13,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [489508724] [2023-12-02 08:26:13,861 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2023-12-02 08:26:13,861 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:26:13,861 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:26:13,861 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:26:13,861 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:26:44,721 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 7 for LOIs [2023-12-02 08:26:44,723 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 81 for LOIs [2023-12-02 08:26:44,793 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2023-12-02 08:26:44,797 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 235 for LOIs [2023-12-02 08:26:47,140 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 236 for LOIs [2023-12-02 08:26:49,347 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 16 for LOIs [2023-12-02 08:26:49,367 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 229 for LOIs [2023-12-02 08:26:49,743 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 240 for LOIs [2023-12-02 08:26:50,161 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:27:07,518 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '73966#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (exists ((|v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10| Int) (v_~q_req_up~0_101 Int) (|v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_12| Int) (v_~q_free~0_106 Int)) (and (or (and (= v_~q_free~0_106 0) (= ~p_dw_pc~0 1) (= 2 ~p_dw_st~0)) (and (<= v_~q_free~0_106 1) (<= 0 ~p_dw_pc~0) (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10|) (= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_12| 0) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10| 1))) (or (exists ((v_~p_dw_st~0_137 Int) (v_~p_dw_pc~0_48 Int)) (and (or (and (= v_~p_dw_st~0_137 1) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_12| 2147483648)) (<= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_12| 2147483647) (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10|) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10| 1) (= v_~p_dw_pc~0_48 0)) (and (= v_~p_dw_st~0_137 1) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_12| 2147483648)) (<= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_12| 2147483647) (<= 0 (+ ~p_last_write~0 2147483648)) (= v_~q_req_up~0_101 1) (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10|) (<= ~p_last_write~0 2147483647) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10| 1) (= v_~p_dw_pc~0_48 1))) (not (= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_12| 0)) (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10| 0)))) (and (= ~p_dw_st~0 0) (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10| 0)))))) (= ~c_dr_pc~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (= ~c_last_read~0 ~p_last_write~0) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_15| Int)) (and (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_15| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_15| 2147483648)) (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_15| 0)))) (= ~c_dr_st~0 1))' at error location [2023-12-02 08:27:07,518 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:27:07,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:27:07,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 51 [2023-12-02 08:27:07,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529898798] [2023-12-02 08:27:07,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 08:27:07,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-02 08:27:07,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:27:07,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-02 08:27:07,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=947, Invalid=10609, Unknown=0, NotChecked=0, Total=11556 [2023-12-02 08:27:07,522 INFO L87 Difference]: Start difference. First operand 2180 states and 2912 transitions. Second operand has 51 states, 34 states have (on average 6.264705882352941) internal successors, (213), 39 states have internal predecessors, (213), 24 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 23 states have call predecessors, (51), 24 states have call successors, (51) [2023-12-02 08:27:15,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:27:15,603 INFO L93 Difference]: Finished difference Result 4385 states and 5491 transitions. [2023-12-02 08:27:15,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2023-12-02 08:27:15,604 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 34 states have (on average 6.264705882352941) internal successors, (213), 39 states have internal predecessors, (213), 24 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 23 states have call predecessors, (51), 24 states have call successors, (51) Word has length 124 [2023-12-02 08:27:15,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:27:15,618 INFO L225 Difference]: With dead ends: 4385 [2023-12-02 08:27:15,618 INFO L226 Difference]: Without dead ends: 3314 [2023-12-02 08:27:15,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 310 SyntacticMatches, 9 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 17865 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=4292, Invalid=39180, Unknown=0, NotChecked=0, Total=43472 [2023-12-02 08:27:15,623 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 5793 mSDsluCounter, 3685 mSDsCounter, 0 mSdLazyCounter, 6831 mSolverCounterSat, 2668 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5793 SdHoareTripleChecker+Valid, 3958 SdHoareTripleChecker+Invalid, 9499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2668 IncrementalHoareTripleChecker+Valid, 6831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-12-02 08:27:15,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5793 Valid, 3958 Invalid, 9499 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2668 Valid, 6831 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-12-02 08:27:15,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3314 states. [2023-12-02 08:27:15,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3314 to 1996. [2023-12-02 08:27:15,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1996 states, 1545 states have (on average 1.3320388349514563) internal successors, (2058), 1561 states have internal predecessors, (2058), 268 states have call successors, (268), 159 states have call predecessors, (268), 181 states have return successors, (368), 277 states have call predecessors, (368), 267 states have call successors, (368) [2023-12-02 08:27:15,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 2694 transitions. [2023-12-02 08:27:15,929 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 2694 transitions. Word has length 124 [2023-12-02 08:27:15,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:27:15,929 INFO L495 AbstractCegarLoop]: Abstraction has 1996 states and 2694 transitions. [2023-12-02 08:27:15,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 34 states have (on average 6.264705882352941) internal successors, (213), 39 states have internal predecessors, (213), 24 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 23 states have call predecessors, (51), 24 states have call successors, (51) [2023-12-02 08:27:15,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 2694 transitions. [2023-12-02 08:27:15,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-02 08:27:15,933 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:27:15,933 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:27:15,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-02 08:27:16,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:27:16,134 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:27:16,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:27:16,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1181732151, now seen corresponding path program 1 times [2023-12-02 08:27:16,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:27:16,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740142545] [2023-12-02 08:27:16,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:27:16,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:27:16,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:27:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-02 08:27:16,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:27:16,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740142545] [2023-12-02 08:27:16,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740142545] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:27:16,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169441721] [2023-12-02 08:27:16,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:27:16,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:27:16,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:27:16,329 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:27:16,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 08:27:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:27:16,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 08:27:16,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:27:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 08:27:16,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:27:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 08:27:16,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169441721] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 08:27:16,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:27:16,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2023-12-02 08:27:16,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139578351] [2023-12-02 08:27:16,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:27:16,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 08:27:16,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:27:16,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 08:27:16,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-12-02 08:27:16,693 INFO L87 Difference]: Start difference. First operand 1996 states and 2694 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 08:27:17,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:27:17,688 INFO L93 Difference]: Finished difference Result 2651 states and 3435 transitions. [2023-12-02 08:27:17,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 08:27:17,689 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2023-12-02 08:27:17,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:27:17,698 INFO L225 Difference]: With dead ends: 2651 [2023-12-02 08:27:17,699 INFO L226 Difference]: Without dead ends: 1764 [2023-12-02 08:27:17,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2023-12-02 08:27:17,702 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 820 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 08:27:17,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [821 Valid, 956 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 08:27:17,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2023-12-02 08:27:17,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1727. [2023-12-02 08:27:17,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1346 states have (on average 1.3469539375928679) internal successors, (1813), 1362 states have internal predecessors, (1813), 232 states have call successors, (232), 129 states have call predecessors, (232), 147 states have return successors, (327), 237 states have call predecessors, (327), 231 states have call successors, (327) [2023-12-02 08:27:17,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 2372 transitions. [2023-12-02 08:27:17,975 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 2372 transitions. Word has length 125 [2023-12-02 08:27:17,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:27:17,975 INFO L495 AbstractCegarLoop]: Abstraction has 1727 states and 2372 transitions. [2023-12-02 08:27:17,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 08:27:17,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 2372 transitions. [2023-12-02 08:27:17,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-12-02 08:27:17,978 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:27:17,978 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:27:17,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 08:27:18,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:27:18,179 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:27:18,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:27:18,179 INFO L85 PathProgramCache]: Analyzing trace with hash 520169084, now seen corresponding path program 1 times [2023-12-02 08:27:18,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:27:18,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246956080] [2023-12-02 08:27:18,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:27:18,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:27:18,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:27:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 08:27:18,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:27:18,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246956080] [2023-12-02 08:27:18,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246956080] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:27:18,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413798220] [2023-12-02 08:27:18,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:27:18,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:27:18,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:27:18,311 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:27:18,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 08:27:18,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:27:18,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 08:27:18,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:27:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-02 08:27:18,564 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:27:18,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413798220] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:27:18,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:27:18,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 08:27:18,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134089443] [2023-12-02 08:27:18,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:27:18,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:27:18,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:27:18,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:27:18,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:27:18,565 INFO L87 Difference]: Start difference. First operand 1727 states and 2372 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 08:27:19,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:27:19,007 INFO L93 Difference]: Finished difference Result 3695 states and 5593 transitions. [2023-12-02 08:27:19,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:27:19,007 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 144 [2023-12-02 08:27:19,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:27:19,015 INFO L225 Difference]: With dead ends: 3695 [2023-12-02 08:27:19,015 INFO L226 Difference]: Without dead ends: 2703 [2023-12-02 08:27:19,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 08:27:19,020 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 374 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:27:19,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 597 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:27:19,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2703 states. [2023-12-02 08:27:19,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2703 to 2696. [2023-12-02 08:27:19,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2696 states, 2178 states have (on average 1.398530762167126) internal successors, (3046), 2197 states have internal predecessors, (3046), 339 states have call successors, (339), 159 states have call predecessors, (339), 177 states have return successors, (496), 341 states have call predecessors, (496), 338 states have call successors, (496) [2023-12-02 08:27:19,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2696 states to 2696 states and 3881 transitions. [2023-12-02 08:27:19,354 INFO L78 Accepts]: Start accepts. Automaton has 2696 states and 3881 transitions. Word has length 144 [2023-12-02 08:27:19,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:27:19,354 INFO L495 AbstractCegarLoop]: Abstraction has 2696 states and 3881 transitions. [2023-12-02 08:27:19,355 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 08:27:19,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2696 states and 3881 transitions. [2023-12-02 08:27:19,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-12-02 08:27:19,358 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:27:19,358 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:27:19,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 08:27:19,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:27:19,559 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:27:19,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:27:19,559 INFO L85 PathProgramCache]: Analyzing trace with hash 2126444158, now seen corresponding path program 1 times [2023-12-02 08:27:19,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:27:19,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250113371] [2023-12-02 08:27:19,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:27:19,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:27:19,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:27:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 08:27:19,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:27:19,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250113371] [2023-12-02 08:27:19,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250113371] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:27:19,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614763320] [2023-12-02 08:27:19,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:27:19,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:27:19,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:27:19,687 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:27:19,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 08:27:19,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:27:19,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 1107 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 08:27:19,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:27:19,962 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 08:27:19,962 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:27:19,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614763320] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:27:19,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:27:19,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 08:27:19,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611631289] [2023-12-02 08:27:19,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:27:19,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:27:19,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:27:19,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:27:19,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:27:19,964 INFO L87 Difference]: Start difference. First operand 2696 states and 3881 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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 08:27:20,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:27:20,607 INFO L93 Difference]: Finished difference Result 6587 states and 10221 transitions. [2023-12-02 08:27:20,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:27:20,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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 144 [2023-12-02 08:27:20,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:27:20,622 INFO L225 Difference]: With dead ends: 6587 [2023-12-02 08:27:20,623 INFO L226 Difference]: Without dead ends: 4626 [2023-12-02 08:27:20,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 08:27:20,632 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 377 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:27:20,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 597 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:27:20,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4626 states. [2023-12-02 08:27:21,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4626 to 4614. [2023-12-02 08:27:21,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4614 states, 3827 states have (on average 1.4324536190227333) internal successors, (5482), 3852 states have internal predecessors, (5482), 548 states have call successors, (548), 219 states have call predecessors, (548), 237 states have return successors, (825), 544 states have call predecessors, (825), 547 states have call successors, (825) [2023-12-02 08:27:21,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4614 states to 4614 states and 6855 transitions. [2023-12-02 08:27:21,168 INFO L78 Accepts]: Start accepts. Automaton has 4614 states and 6855 transitions. Word has length 144 [2023-12-02 08:27:21,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:27:21,168 INFO L495 AbstractCegarLoop]: Abstraction has 4614 states and 6855 transitions. [2023-12-02 08:27:21,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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 08:27:21,168 INFO L276 IsEmpty]: Start isEmpty. Operand 4614 states and 6855 transitions. [2023-12-02 08:27:21,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-12-02 08:27:21,174 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:27:21,174 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:27:21,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 08:27:21,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-02 08:27:21,375 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:27:21,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:27:21,375 INFO L85 PathProgramCache]: Analyzing trace with hash 141561660, now seen corresponding path program 1 times [2023-12-02 08:27:21,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:27:21,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727558381] [2023-12-02 08:27:21,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:27:21,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:27:21,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:27:21,468 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 08:27:21,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:27:21,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727558381] [2023-12-02 08:27:21,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727558381] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:27:21,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084785655] [2023-12-02 08:27:21,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:27:21,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:27:21,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:27:21,470 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:27:21,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 08:27:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:27:21,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 1101 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 08:27:21,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:27:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 08:27:21,716 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:27:21,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084785655] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:27:21,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:27:21,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 08:27:21,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158874196] [2023-12-02 08:27:21,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:27:21,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:27:21,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:27:21,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:27:21,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:27:21,717 INFO L87 Difference]: Start difference. First operand 4614 states and 6855 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 08:27:22,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:27:22,698 INFO L93 Difference]: Finished difference Result 12311 states and 19336 transitions. [2023-12-02 08:27:22,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:27:22,698 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 144 [2023-12-02 08:27:22,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:27:22,718 INFO L225 Difference]: With dead ends: 12311 [2023-12-02 08:27:22,718 INFO L226 Difference]: Without dead ends: 8432 [2023-12-02 08:27:22,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 08:27:22,738 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 368 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:27:22,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 592 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:27:22,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8432 states. [2023-12-02 08:27:23,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8432 to 8410. [2023-12-02 08:27:23,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8410 states, 7095 states have (on average 1.4508809020436928) internal successors, (10294), 7132 states have internal predecessors, (10294), 956 states have call successors, (956), 339 states have call predecessors, (956), 357 states have return successors, (1465), 940 states have call predecessors, (1465), 955 states have call successors, (1465) [2023-12-02 08:27:23,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8410 states to 8410 states and 12715 transitions. [2023-12-02 08:27:23,635 INFO L78 Accepts]: Start accepts. Automaton has 8410 states and 12715 transitions. Word has length 144 [2023-12-02 08:27:23,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:27:23,635 INFO L495 AbstractCegarLoop]: Abstraction has 8410 states and 12715 transitions. [2023-12-02 08:27:23,635 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 08:27:23,635 INFO L276 IsEmpty]: Start isEmpty. Operand 8410 states and 12715 transitions. [2023-12-02 08:27:23,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-12-02 08:27:23,648 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:27:23,649 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:27:23,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-02 08:27:23,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:27:23,849 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:27:23,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:27:23,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1052936382, now seen corresponding path program 1 times [2023-12-02 08:27:23,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:27:23,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139517777] [2023-12-02 08:27:23,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:27:23,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:27:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:27:23,943 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 08:27:23,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:27:23,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139517777] [2023-12-02 08:27:23,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139517777] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:27:23,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747629955] [2023-12-02 08:27:23,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:27:23,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:27:23,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:27:23,945 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:27:23,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 08:27:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:27:24,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 08:27:24,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:27:24,220 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 08:27:24,220 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:27:24,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747629955] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:27:24,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:27:24,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 08:27:24,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508062444] [2023-12-02 08:27:24,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:27:24,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:27:24,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:27:24,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:27:24,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:27:24,222 INFO L87 Difference]: Start difference. First operand 8410 states and 12715 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 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 08:27:25,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:27:25,823 INFO L93 Difference]: Finished difference Result 23639 states and 37284 transitions. [2023-12-02 08:27:25,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:27:25,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 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 144 [2023-12-02 08:27:25,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:27:25,855 INFO L225 Difference]: With dead ends: 23639 [2023-12-02 08:27:25,855 INFO L226 Difference]: Without dead ends: 15964 [2023-12-02 08:27:25,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 08:27:25,875 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 347 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:27:25,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 592 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:27:25,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15964 states. [2023-12-02 08:27:27,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15964 to 15922. [2023-12-02 08:27:27,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15922 states, 13571 states have (on average 1.458846068823226) internal successors, (19798), 13632 states have internal predecessors, (19798), 1752 states have call successors, (1752), 579 states have call predecessors, (1752), 597 states have return successors, (2709), 1712 states have call predecessors, (2709), 1751 states have call successors, (2709) [2023-12-02 08:27:27,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15922 states to 15922 states and 24259 transitions. [2023-12-02 08:27:27,335 INFO L78 Accepts]: Start accepts. Automaton has 15922 states and 24259 transitions. Word has length 144 [2023-12-02 08:27:27,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:27:27,335 INFO L495 AbstractCegarLoop]: Abstraction has 15922 states and 24259 transitions. [2023-12-02 08:27:27,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 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 08:27:27,335 INFO L276 IsEmpty]: Start isEmpty. Operand 15922 states and 24259 transitions. [2023-12-02 08:27:27,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-12-02 08:27:27,356 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:27:27,356 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:27:27,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 08:27:27,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:27:27,557 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:27:27,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:27:27,557 INFO L85 PathProgramCache]: Analyzing trace with hash -302718468, now seen corresponding path program 1 times [2023-12-02 08:27:27,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:27:27,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658614835] [2023-12-02 08:27:27,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:27:27,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:27:27,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:27:27,690 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 08:27:27,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:27:27,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658614835] [2023-12-02 08:27:27,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658614835] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:27:27,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133704280] [2023-12-02 08:27:27,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:27:27,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:27:27,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:27:27,692 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:27:27,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 08:27:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:27:27,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 1089 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 08:27:27,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:27:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 08:27:28,006 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:27:28,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133704280] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:27:28,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:27:28,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 08:27:28,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184285202] [2023-12-02 08:27:28,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:27:28,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:27:28,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:27:28,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:27:28,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:27:28,008 INFO L87 Difference]: Start difference. First operand 15922 states and 24259 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 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 08:27:30,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:27:30,776 INFO L93 Difference]: Finished difference Result 46055 states and 72616 transitions. [2023-12-02 08:27:30,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:27:30,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 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 144 [2023-12-02 08:27:30,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:27:30,860 INFO L225 Difference]: With dead ends: 46055 [2023-12-02 08:27:30,860 INFO L226 Difference]: Without dead ends: 30868 [2023-12-02 08:27:30,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 08:27:30,889 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 356 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:27:30,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 592 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:27:30,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30868 states. [2023-12-02 08:27:33,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30868 to 30786. [2023-12-02 08:27:33,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30786 states, 26403 states have (on average 1.460667348407378) internal successors, (38566), 26512 states have internal predecessors, (38566), 3304 states have call successors, (3304), 1059 states have call predecessors, (3304), 1077 states have return successors, (5125), 3216 states have call predecessors, (5125), 3303 states have call successors, (5125) [2023-12-02 08:27:33,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30786 states to 30786 states and 46995 transitions. [2023-12-02 08:27:33,829 INFO L78 Accepts]: Start accepts. Automaton has 30786 states and 46995 transitions. Word has length 144 [2023-12-02 08:27:33,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:27:33,830 INFO L495 AbstractCegarLoop]: Abstraction has 30786 states and 46995 transitions. [2023-12-02 08:27:33,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 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 08:27:33,830 INFO L276 IsEmpty]: Start isEmpty. Operand 30786 states and 46995 transitions. [2023-12-02 08:27:33,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-12-02 08:27:33,854 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:27:33,854 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:27:33,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 08:27:34,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-02 08:27:34,055 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:27:34,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:27:34,055 INFO L85 PathProgramCache]: Analyzing trace with hash -383775106, now seen corresponding path program 1 times [2023-12-02 08:27:34,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:27:34,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144965943] [2023-12-02 08:27:34,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:27:34,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:27:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:27:34,147 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 08:27:34,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:27:34,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144965943] [2023-12-02 08:27:34,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144965943] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:27:34,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540702047] [2023-12-02 08:27:34,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:27:34,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:27:34,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:27:34,149 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:27:34,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 08:27:34,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:27:34,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 08:27:34,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:27:34,441 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 08:27:34,441 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:27:34,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540702047] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:27:34,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:27:34,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 08:27:34,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196201394] [2023-12-02 08:27:34,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:27:34,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:27:34,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:27:34,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:27:34,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:27:34,443 INFO L87 Difference]: Start difference. First operand 30786 states and 46995 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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 08:27:40,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:27:40,018 INFO L93 Difference]: Finished difference Result 90407 states and 142152 transitions. [2023-12-02 08:27:40,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:27:40,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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 144 [2023-12-02 08:27:40,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:27:40,204 INFO L225 Difference]: With dead ends: 90407 [2023-12-02 08:27:40,204 INFO L226 Difference]: Without dead ends: 60356 [2023-12-02 08:27:40,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 08:27:40,288 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 362 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:27:40,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 592 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:27:40,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60356 states. [2023-12-02 08:27:45,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60356 to 60194. [2023-12-02 08:27:45,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60194 states, 51827 states have (on average 1.4591236228220812) internal successors, (75622), 52032 states have internal predecessors, (75622), 6328 states have call successors, (6328), 2019 states have call predecessors, (6328), 2037 states have return successors, (9813), 6144 states have call predecessors, (9813), 6327 states have call successors, (9813) [2023-12-02 08:27:45,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60194 states to 60194 states and 91763 transitions. [2023-12-02 08:27:45,986 INFO L78 Accepts]: Start accepts. Automaton has 60194 states and 91763 transitions. Word has length 144 [2023-12-02 08:27:45,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:27:45,986 INFO L495 AbstractCegarLoop]: Abstraction has 60194 states and 91763 transitions. [2023-12-02 08:27:45,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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 08:27:45,987 INFO L276 IsEmpty]: Start isEmpty. Operand 60194 states and 91763 transitions. [2023-12-02 08:27:46,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-12-02 08:27:46,036 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:27:46,036 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:27:46,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 08:27:46,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:27:46,237 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:27:46,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:27:46,237 INFO L85 PathProgramCache]: Analyzing trace with hash 119820672, now seen corresponding path program 1 times [2023-12-02 08:27:46,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:27:46,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233622375] [2023-12-02 08:27:46,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:27:46,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:27:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:27:46,392 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 08:27:46,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:27:46,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233622375] [2023-12-02 08:27:46,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233622375] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:27:46,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610221804] [2023-12-02 08:27:46,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:27:46,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:27:46,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:27:46,394 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:27:46,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 08:27:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:27:46,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 1077 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 08:27:46,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:27:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 08:27:46,691 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:27:46,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610221804] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:27:46,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:27:46,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 08:27:46,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723247292] [2023-12-02 08:27:46,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:27:46,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:27:46,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:27:46,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:27:46,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:27:46,694 INFO L87 Difference]: Start difference. First operand 60194 states and 91763 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 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 08:27:57,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:27:57,125 INFO L93 Difference]: Finished difference Result 178151 states and 278968 transitions. [2023-12-02 08:27:57,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:27:57,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 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 144 [2023-12-02 08:27:57,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:27:57,452 INFO L225 Difference]: With dead ends: 178151 [2023-12-02 08:27:57,453 INFO L226 Difference]: Without dead ends: 118692 [2023-12-02 08:27:57,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 08:27:57,569 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 353 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:27:57,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 592 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:27:57,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118692 states. [2023-12-02 08:28:07,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118692 to 118370. [2023-12-02 08:28:07,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118370 states, 102195 states have (on average 1.455785508097265) internal successors, (148774), 102592 states have internal predecessors, (148774), 12216 states have call successors, (12216), 3939 states have call predecessors, (12216), 3957 states have return successors, (18901), 11840 states have call predecessors, (18901), 12215 states have call successors, (18901) [2023-12-02 08:28:07,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118370 states to 118370 states and 179891 transitions. [2023-12-02 08:28:07,951 INFO L78 Accepts]: Start accepts. Automaton has 118370 states and 179891 transitions. Word has length 144 [2023-12-02 08:28:07,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:28:07,951 INFO L495 AbstractCegarLoop]: Abstraction has 118370 states and 179891 transitions. [2023-12-02 08:28:07,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 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 08:28:07,951 INFO L276 IsEmpty]: Start isEmpty. Operand 118370 states and 179891 transitions. [2023-12-02 08:28:08,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-12-02 08:28:08,025 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:28:08,025 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:28:08,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 08:28:08,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea5a9f9-69aa-4aad-a792-5d0e9f694290/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 08:28:08,226 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:28:08,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:28:08,226 INFO L85 PathProgramCache]: Analyzing trace with hash -483244994, now seen corresponding path program 1 times [2023-12-02 08:28:08,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:28:08,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883556276] [2023-12-02 08:28:08,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:28:08,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:28:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:28:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-02 08:28:08,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:28:08,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883556276] [2023-12-02 08:28:08,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883556276] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:28:08,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:28:08,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 08:28:08,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305522950] [2023-12-02 08:28:08,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:28:08,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:28:08,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:28:08,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:28:08,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:28:08,567 INFO L87 Difference]: Start difference. First operand 118370 states and 179891 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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 08:28:28,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:28:28,347 INFO L93 Difference]: Finished difference Result 378918 states and 583477 transitions. [2023-12-02 08:28:28,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 08:28:28,348 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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 144 [2023-12-02 08:28:28,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:28:29,310 INFO L225 Difference]: With dead ends: 378918 [2023-12-02 08:28:29,310 INFO L226 Difference]: Without dead ends: 261284 [2023-12-02 08:28:29,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-12-02 08:28:29,502 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 1013 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1045 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 08:28:29,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1045 Valid, 1119 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 08:28:29,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261284 states. [2023-12-02 08:28:50,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261284 to 232162. [2023-12-02 08:28:50,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232162 states, 200691 states have (on average 1.451176186276415) internal successors, (291238), 201472 states have internal predecessors, (291238), 23672 states have call successors, (23672), 7779 states have call predecessors, (23672), 7797 states have return successors, (36501), 22912 states have call predecessors, (36501), 23671 states have call successors, (36501) [2023-12-02 08:28:51,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232162 states to 232162 states and 351411 transitions. [2023-12-02 08:28:51,603 INFO L78 Accepts]: Start accepts. Automaton has 232162 states and 351411 transitions. Word has length 144 [2023-12-02 08:28:51,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:28:51,603 INFO L495 AbstractCegarLoop]: Abstraction has 232162 states and 351411 transitions. [2023-12-02 08:28:51,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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 08:28:51,604 INFO L276 IsEmpty]: Start isEmpty. Operand 232162 states and 351411 transitions. [2023-12-02 08:28:51,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-12-02 08:28:51,781 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:28:51,781 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, 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] [2023-12-02 08:28:51,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-12-02 08:28:51,781 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:28:51,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:28:51,782 INFO L85 PathProgramCache]: Analyzing trace with hash -407072893, now seen corresponding path program 1 times [2023-12-02 08:28:51,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:28:51,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804159175] [2023-12-02 08:28:51,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:28:51,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:28:51,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:28:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-02 08:28:52,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:28:52,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804159175] [2023-12-02 08:28:52,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804159175] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:28:52,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:28:52,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 08:28:52,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71663921] [2023-12-02 08:28:52,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:28:52,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:28:52,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:28:52,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:28:52,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:28:52,189 INFO L87 Difference]: Start difference. First operand 232162 states and 351411 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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 08:29:23,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:29:23,532 INFO L93 Difference]: Finished difference Result 603622 states and 922677 transitions. [2023-12-02 08:29:23,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 08:29:23,533 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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 146 [2023-12-02 08:29:23,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:29:24,812 INFO L225 Difference]: With dead ends: 603622 [2023-12-02 08:29:24,812 INFO L226 Difference]: Without dead ends: 372196 [2023-12-02 08:29:25,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-12-02 08:29:25,200 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 968 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 08:29:25,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [984 Valid, 934 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 08:29:25,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372196 states. [2023-12-02 08:29:56,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372196 to 345314. [2023-12-02 08:29:56,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345314 states, 298547 states have (on average 1.4473499984926996) internal successors, (432102), 299712 states have internal predecessors, (432102), 35128 states have call successors, (35128), 11619 states have call predecessors, (35128), 11637 states have return successors, (54101), 33984 states have call predecessors, (54101), 35127 states have call successors, (54101) [2023-12-02 08:29:58,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345314 states to 345314 states and 521331 transitions. [2023-12-02 08:29:58,548 INFO L78 Accepts]: Start accepts. Automaton has 345314 states and 521331 transitions. Word has length 146 [2023-12-02 08:29:58,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:29:58,549 INFO L495 AbstractCegarLoop]: Abstraction has 345314 states and 521331 transitions. [2023-12-02 08:29:58,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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 08:29:58,549 INFO L276 IsEmpty]: Start isEmpty. Operand 345314 states and 521331 transitions. [2023-12-02 08:29:58,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-12-02 08:29:58,759 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:29:58,759 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, 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] [2023-12-02 08:29:58,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-12-02 08:29:58,759 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:29:58,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:29:58,759 INFO L85 PathProgramCache]: Analyzing trace with hash 610000510, now seen corresponding path program 1 times [2023-12-02 08:29:58,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:29:58,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376004451] [2023-12-02 08:29:58,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:29:58,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:29:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:29:59,072 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-02 08:29:59,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:29:59,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376004451] [2023-12-02 08:29:59,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376004451] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:29:59,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:29:59,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 08:29:59,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837737871] [2023-12-02 08:29:59,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:29:59,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:29:59,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:29:59,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:29:59,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:29:59,074 INFO L87 Difference]: Start difference. First operand 345314 states and 521331 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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 08:31:00,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:31:00,787 INFO L93 Difference]: Finished difference Result 1089190 states and 1667573 transitions. [2023-12-02 08:31:00,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 08:31:00,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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 148 [2023-12-02 08:31:00,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:31:03,644 INFO L225 Difference]: With dead ends: 1089190 [2023-12-02 08:31:03,645 INFO L226 Difference]: Without dead ends: 744612 [2023-12-02 08:31:04,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-12-02 08:31:04,383 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 1008 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1040 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 08:31:04,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1040 Valid, 867 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 08:31:04,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744612 states. [2023-12-02 08:32:10,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744612 to 678370. [2023-12-02 08:32:11,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678370 states, 586995 states have (on average 1.441875995536589) internal successors, (846374), 589312 states have internal predecessors, (846374), 68216 states have call successors, (68216), 23139 states have call predecessors, (68216), 23157 states have return successors, (104597), 65920 states have call predecessors, (104597), 68215 states have call successors, (104597) [2023-12-02 08:32:14,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678370 states to 678370 states and 1019187 transitions. [2023-12-02 08:32:14,806 INFO L78 Accepts]: Start accepts. Automaton has 678370 states and 1019187 transitions. Word has length 148 [2023-12-02 08:32:14,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:32:14,806 INFO L495 AbstractCegarLoop]: Abstraction has 678370 states and 1019187 transitions. [2023-12-02 08:32:14,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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 08:32:14,806 INFO L276 IsEmpty]: Start isEmpty. Operand 678370 states and 1019187 transitions. [2023-12-02 08:32:15,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-12-02 08:32:15,277 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:32:15,277 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, 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] [2023-12-02 08:32:15,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-12-02 08:32:15,277 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:32:15,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:32:15,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1229706887, now seen corresponding path program 1 times [2023-12-02 08:32:15,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:32:15,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155228865] [2023-12-02 08:32:15,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:32:15,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:32:15,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:32:15,794 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-02 08:32:15,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:32:15,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155228865] [2023-12-02 08:32:15,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155228865] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:32:15,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:32:15,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 08:32:15,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672782084] [2023-12-02 08:32:15,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:32:15,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:32:15,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:32:15,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:32:15,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:32:15,796 INFO L87 Difference]: Start difference. First operand 678370 states and 1019187 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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)