./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.06.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2a62fe-2e1b-4a7c-b449-baac474178c1/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2a62fe-2e1b-4a7c-b449-baac474178c1/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2a62fe-2e1b-4a7c-b449-baac474178c1/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2a62fe-2e1b-4a7c-b449-baac474178c1/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.06.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2a62fe-2e1b-4a7c-b449-baac474178c1/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2a62fe-2e1b-4a7c-b449-baac474178c1/bin/utaipan-verify-t7M7D8N6sZ --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 bbfdf3f22061e77485b28b33d06a9820d2c4b7aa22afc378a1743c2d746b69df --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:24:25,828 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:24:25,963 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2a62fe-2e1b-4a7c-b449-baac474178c1/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:24:25,973 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:24:25,975 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:24:26,019 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:24:26,020 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:24:26,021 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:24:26,022 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:24:26,028 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:24:26,029 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:24:26,029 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:24:26,030 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:24:26,032 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:24:26,032 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:24:26,032 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:24:26,033 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:24:26,033 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:24:26,034 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:24:26,034 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:24:26,037 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:24:26,038 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:24:26,039 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:24:26,039 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:24:26,040 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:24:26,040 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:24:26,041 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:24:26,041 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:24:26,042 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:24:26,042 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:24:26,043 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:24:26,044 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:24:26,044 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:24:26,044 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:24:26,045 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:24:26,045 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:24:26,045 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:24:26,045 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:24:26,046 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:24:26,046 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:24:26,046 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:24:26,047 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:24:26,047 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:24:26,047 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:24:26,048 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:24:26,048 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_cd2a62fe-2e1b-4a7c-b449-baac474178c1/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2a62fe-2e1b-4a7c-b449-baac474178c1/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bbfdf3f22061e77485b28b33d06a9820d2c4b7aa22afc378a1743c2d746b69df [2023-11-19 05:24:26,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:24:26,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:24:26,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:24:26,406 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:24:26,407 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:24:26,411 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2a62fe-2e1b-4a7c-b449-baac474178c1/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/systemc/transmitter.06.cil.c [2023-11-19 05:24:30,080 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:24:30,343 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:24:30,343 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2a62fe-2e1b-4a7c-b449-baac474178c1/sv-benchmarks/c/systemc/transmitter.06.cil.c [2023-11-19 05:24:30,361 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2a62fe-2e1b-4a7c-b449-baac474178c1/bin/utaipan-verify-t7M7D8N6sZ/data/851c940c4/a2a41ee11d694ae280a9403eead07ca5/FLAG8ab10436c [2023-11-19 05:24:30,380 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2a62fe-2e1b-4a7c-b449-baac474178c1/bin/utaipan-verify-t7M7D8N6sZ/data/851c940c4/a2a41ee11d694ae280a9403eead07ca5 [2023-11-19 05:24:30,383 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:24:30,385 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:24:30,387 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:24:30,387 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:24:30,393 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:24:30,394 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:24:30" (1/1) ... [2023-11-19 05:24:30,396 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68767989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:30, skipping insertion in model container [2023-11-19 05:24:30,396 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:24:30" (1/1) ... [2023-11-19 05:24:30,458 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:24:30,648 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_cd2a62fe-2e1b-4a7c-b449-baac474178c1/sv-benchmarks/c/systemc/transmitter.06.cil.c[706,719] [2023-11-19 05:24:30,793 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:24:30,810 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:24:30,824 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_cd2a62fe-2e1b-4a7c-b449-baac474178c1/sv-benchmarks/c/systemc/transmitter.06.cil.c[706,719] [2023-11-19 05:24:30,875 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:24:30,901 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:24:30,901 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:30 WrapperNode [2023-11-19 05:24:30,902 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:24:30,903 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:24:30,903 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:24:30,904 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:24:30,913 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:30" (1/1) ... [2023-11-19 05:24:30,927 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:30" (1/1) ... [2023-11-19 05:24:31,005 INFO L138 Inliner]: procedures = 40, calls = 48, calls flagged for inlining = 24, calls inlined = 24, statements flattened = 505 [2023-11-19 05:24:31,008 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:24:31,008 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:24:31,009 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:24:31,009 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:24:31,024 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:30" (1/1) ... [2023-11-19 05:24:31,024 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:30" (1/1) ... [2023-11-19 05:24:31,029 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:30" (1/1) ... [2023-11-19 05:24:31,029 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:30" (1/1) ... [2023-11-19 05:24:31,042 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:30" (1/1) ... [2023-11-19 05:24:31,076 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:30" (1/1) ... [2023-11-19 05:24:31,083 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:30" (1/1) ... [2023-11-19 05:24:31,086 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:30" (1/1) ... [2023-11-19 05:24:31,092 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:24:31,094 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:24:31,094 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:24:31,094 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:24:31,095 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:30" (1/1) ... [2023-11-19 05:24:31,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:24:31,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2a62fe-2e1b-4a7c-b449-baac474178c1/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:24:31,144 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2a62fe-2e1b-4a7c-b449-baac474178c1/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:24:31,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2a62fe-2e1b-4a7c-b449-baac474178c1/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:24:31,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:24:31,199 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-19 05:24:31,199 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-19 05:24:31,199 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-19 05:24:31,199 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-19 05:24:31,200 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-19 05:24:31,202 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-19 05:24:31,203 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-19 05:24:31,204 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-19 05:24:31,204 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-19 05:24:31,204 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-19 05:24:31,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:24:31,205 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-19 05:24:31,205 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-19 05:24:31,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:24:31,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:24:31,391 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:24:31,394 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:24:32,123 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:24:32,545 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:24:32,545 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-19 05:24:32,560 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:24:32 BoogieIcfgContainer [2023-11-19 05:24:32,561 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:24:32,566 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:24:32,567 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:24:32,572 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:24:32,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:24:30" (1/3) ... [2023-11-19 05:24:32,573 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bdf8979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:24:32, skipping insertion in model container [2023-11-19 05:24:32,574 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:30" (2/3) ... [2023-11-19 05:24:32,577 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bdf8979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:24:32, skipping insertion in model container [2023-11-19 05:24:32,577 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:24:32" (3/3) ... [2023-11-19 05:24:32,579 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.06.cil.c [2023-11-19 05:24:32,603 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:24:32,604 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:24:32,742 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:24:32,754 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;@7f7d9951, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:24:32,754 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:24:32,766 INFO L276 IsEmpty]: Start isEmpty. Operand has 127 states, 100 states have (on average 1.5) internal successors, (150), 102 states have internal predecessors, (150), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-19 05:24:32,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-19 05:24:32,811 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:32,812 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:32,812 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:32,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:32,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1840597399, now seen corresponding path program 1 times [2023-11-19 05:24:32,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:32,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178683983] [2023-11-19 05:24:32,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:32,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:33,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:33,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:24:33,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:33,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178683983] [2023-11-19 05:24:33,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178683983] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:33,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:24:33,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:24:33,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018714952] [2023-11-19 05:24:33,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:33,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:24:33,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:33,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:24:33,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:24:33,454 INFO L87 Difference]: Start difference. First operand has 127 states, 100 states have (on average 1.5) internal successors, (150), 102 states have internal predecessors, (150), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:24:33,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:33,860 INFO L93 Difference]: Finished difference Result 364 states and 554 transitions. [2023-11-19 05:24:33,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:24:33,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 53 [2023-11-19 05:24:33,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:33,882 INFO L225 Difference]: With dead ends: 364 [2023-11-19 05:24:33,883 INFO L226 Difference]: Without dead ends: 238 [2023-11-19 05:24:33,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:24:33,901 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 315 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:33,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 490 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:24:33,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-11-19 05:24:33,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 235. [2023-11-19 05:24:33,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 189 states have (on average 1.4285714285714286) internal successors, (270), 190 states have internal predecessors, (270), 33 states have call successors, (33), 12 states have call predecessors, (33), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-19 05:24:33,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 336 transitions. [2023-11-19 05:24:33,983 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 336 transitions. Word has length 53 [2023-11-19 05:24:33,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:33,984 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 336 transitions. [2023-11-19 05:24:33,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:24:33,985 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 336 transitions. [2023-11-19 05:24:33,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-19 05:24:33,988 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:33,989 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] [2023-11-19 05:24:33,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:24:33,989 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:33,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:33,990 INFO L85 PathProgramCache]: Analyzing trace with hash 57932906, now seen corresponding path program 1 times [2023-11-19 05:24:33,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:33,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972955406] [2023-11-19 05:24:33,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:33,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:24:34,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:34,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972955406] [2023-11-19 05:24:34,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972955406] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:34,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:24:34,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:24:34,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740346167] [2023-11-19 05:24:34,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:34,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:24:34,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:34,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:24:34,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:24:34,262 INFO L87 Difference]: Start difference. First operand 235 states and 336 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:24:34,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:34,931 INFO L93 Difference]: Finished difference Result 797 states and 1148 transitions. [2023-11-19 05:24:34,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:24:34,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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 53 [2023-11-19 05:24:34,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:34,938 INFO L225 Difference]: With dead ends: 797 [2023-11-19 05:24:34,938 INFO L226 Difference]: Without dead ends: 547 [2023-11-19 05:24:34,940 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 [2023-11-19 05:24:34,941 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 639 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:34,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 739 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:24:34,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2023-11-19 05:24:35,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 535. [2023-11-19 05:24:35,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 442 states have (on average 1.420814479638009) internal successors, (628), 438 states have internal predecessors, (628), 64 states have call successors, (64), 26 states have call predecessors, (64), 28 states have return successors, (71), 71 states have call predecessors, (71), 64 states have call successors, (71) [2023-11-19 05:24:35,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 763 transitions. [2023-11-19 05:24:35,011 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 763 transitions. Word has length 53 [2023-11-19 05:24:35,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:35,011 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 763 transitions. [2023-11-19 05:24:35,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:24:35,012 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 763 transitions. [2023-11-19 05:24:35,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-19 05:24:35,015 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:35,015 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] [2023-11-19 05:24:35,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:24:35,016 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:35,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:35,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1183192875, now seen corresponding path program 1 times [2023-11-19 05:24:35,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:35,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96768466] [2023-11-19 05:24:35,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:35,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:24:35,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:35,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96768466] [2023-11-19 05:24:35,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96768466] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:35,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:24:35,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:24:35,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126231240] [2023-11-19 05:24:35,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:35,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:24:35,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:35,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:24:35,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:24:35,184 INFO L87 Difference]: Start difference. First operand 535 states and 763 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:24:35,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:35,839 INFO L93 Difference]: Finished difference Result 1857 states and 2675 transitions. [2023-11-19 05:24:35,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:24:35,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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 53 [2023-11-19 05:24:35,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:35,852 INFO L225 Difference]: With dead ends: 1857 [2023-11-19 05:24:35,853 INFO L226 Difference]: Without dead ends: 1290 [2023-11-19 05:24:35,856 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 [2023-11-19 05:24:35,858 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 639 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:35,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 574 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:24:35,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2023-11-19 05:24:35,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 1002. [2023-11-19 05:24:35,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 829 states have (on average 1.4209891435464415) internal successors, (1178), 826 states have internal predecessors, (1178), 116 states have call successors, (116), 50 states have call predecessors, (116), 56 states have return successors, (136), 126 states have call predecessors, (136), 116 states have call successors, (136) [2023-11-19 05:24:35,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1430 transitions. [2023-11-19 05:24:35,983 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1430 transitions. Word has length 53 [2023-11-19 05:24:35,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:35,984 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 1430 transitions. [2023-11-19 05:24:35,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:24:35,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1430 transitions. [2023-11-19 05:24:35,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-19 05:24:35,987 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:35,988 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] [2023-11-19 05:24:35,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:24:35,988 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:35,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:35,989 INFO L85 PathProgramCache]: Analyzing trace with hash -445457398, now seen corresponding path program 1 times [2023-11-19 05:24:35,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:35,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690138534] [2023-11-19 05:24:35,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:35,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:36,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:24:36,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:36,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690138534] [2023-11-19 05:24:36,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690138534] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:36,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:24:36,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:24:36,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326816621] [2023-11-19 05:24:36,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:36,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:24:36,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:36,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:24:36,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:24:36,141 INFO L87 Difference]: Start difference. First operand 1002 states and 1430 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:24:36,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:36,915 INFO L93 Difference]: Finished difference Result 3410 states and 4926 transitions. [2023-11-19 05:24:36,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:24:36,916 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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 53 [2023-11-19 05:24:36,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:36,937 INFO L225 Difference]: With dead ends: 3410 [2023-11-19 05:24:36,937 INFO L226 Difference]: Without dead ends: 2343 [2023-11-19 05:24:36,943 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 [2023-11-19 05:24:36,945 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 639 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:36,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 574 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:24:36,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2343 states. [2023-11-19 05:24:37,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2343 to 1910. [2023-11-19 05:24:37,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1581 states have (on average 1.41808981657179) internal successors, (2242), 1582 states have internal predecessors, (2242), 216 states have call successors, (216), 98 states have call predecessors, (216), 112 states have return successors, (260), 230 states have call predecessors, (260), 216 states have call successors, (260) [2023-11-19 05:24:37,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 2718 transitions. [2023-11-19 05:24:37,149 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 2718 transitions. Word has length 53 [2023-11-19 05:24:37,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:37,150 INFO L495 AbstractCegarLoop]: Abstraction has 1910 states and 2718 transitions. [2023-11-19 05:24:37,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:24:37,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 2718 transitions. [2023-11-19 05:24:37,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-19 05:24:37,152 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:37,152 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] [2023-11-19 05:24:37,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:24:37,153 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:37,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:37,154 INFO L85 PathProgramCache]: Analyzing trace with hash -753896407, now seen corresponding path program 1 times [2023-11-19 05:24:37,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:37,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583031314] [2023-11-19 05:24:37,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:37,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:37,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:24:37,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:37,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583031314] [2023-11-19 05:24:37,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583031314] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:37,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:24:37,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:24:37,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366217467] [2023-11-19 05:24:37,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:37,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:24:37,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:37,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:24:37,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:24:37,481 INFO L87 Difference]: Start difference. First operand 1910 states and 2718 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:24:38,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:38,235 INFO L93 Difference]: Finished difference Result 5432 states and 7763 transitions. [2023-11-19 05:24:38,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:24:38,236 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (5), 2 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 53 [2023-11-19 05:24:38,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:38,268 INFO L225 Difference]: With dead ends: 5432 [2023-11-19 05:24:38,268 INFO L226 Difference]: Without dead ends: 3528 [2023-11-19 05:24:38,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-19 05:24:38,277 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 495 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:38,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 479 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:24:38,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3528 states. [2023-11-19 05:24:38,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3528 to 3172. [2023-11-19 05:24:38,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3172 states, 2651 states have (on average 1.4092795171633345) internal successors, (3736), 2652 states have internal predecessors, (3736), 328 states have call successors, (328), 164 states have call predecessors, (328), 192 states have return successors, (416), 356 states have call predecessors, (416), 328 states have call successors, (416) [2023-11-19 05:24:38,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3172 states to 3172 states and 4480 transitions. [2023-11-19 05:24:38,597 INFO L78 Accepts]: Start accepts. Automaton has 3172 states and 4480 transitions. Word has length 53 [2023-11-19 05:24:38,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:38,598 INFO L495 AbstractCegarLoop]: Abstraction has 3172 states and 4480 transitions. [2023-11-19 05:24:38,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:24:38,599 INFO L276 IsEmpty]: Start isEmpty. Operand 3172 states and 4480 transitions. [2023-11-19 05:24:38,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-19 05:24:38,600 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:38,600 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] [2023-11-19 05:24:38,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:24:38,601 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:38,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:38,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1114404137, now seen corresponding path program 1 times [2023-11-19 05:24:38,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:38,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930225487] [2023-11-19 05:24:38,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:38,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:38,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:38,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:24:38,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:38,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930225487] [2023-11-19 05:24:38,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930225487] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:38,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:24:38,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:24:38,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430107206] [2023-11-19 05:24:38,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:38,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:24:38,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:38,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:24:38,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:24:38,893 INFO L87 Difference]: Start difference. First operand 3172 states and 4480 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:24:39,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:39,803 INFO L93 Difference]: Finished difference Result 10370 states and 14694 transitions. [2023-11-19 05:24:39,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:24:39,812 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (5), 2 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 55 [2023-11-19 05:24:39,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:39,888 INFO L225 Difference]: With dead ends: 10370 [2023-11-19 05:24:39,888 INFO L226 Difference]: Without dead ends: 7204 [2023-11-19 05:24:39,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-19 05:24:39,906 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 492 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:39,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 404 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:24:39,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7204 states. [2023-11-19 05:24:40,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7204 to 6182. [2023-11-19 05:24:40,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6182 states, 5169 states have (on average 1.400077384407042) internal successors, (7237), 5172 states have internal predecessors, (7237), 628 states have call successors, (628), 328 states have call predecessors, (628), 384 states have return successors, (790), 682 states have call predecessors, (790), 628 states have call successors, (790) [2023-11-19 05:24:40,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6182 states to 6182 states and 8655 transitions. [2023-11-19 05:24:40,634 INFO L78 Accepts]: Start accepts. Automaton has 6182 states and 8655 transitions. Word has length 55 [2023-11-19 05:24:40,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:40,635 INFO L495 AbstractCegarLoop]: Abstraction has 6182 states and 8655 transitions. [2023-11-19 05:24:40,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:24:40,636 INFO L276 IsEmpty]: Start isEmpty. Operand 6182 states and 8655 transitions. [2023-11-19 05:24:40,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-19 05:24:40,639 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:40,639 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] [2023-11-19 05:24:40,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:24:40,642 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:40,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:40,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1276909092, now seen corresponding path program 1 times [2023-11-19 05:24:40,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:40,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956344424] [2023-11-19 05:24:40,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:40,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:40,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:40,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:24:40,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:40,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956344424] [2023-11-19 05:24:40,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956344424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:40,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:24:40,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:24:40,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107977075] [2023-11-19 05:24:40,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:40,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:24:40,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:40,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:24:40,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:24:40,960 INFO L87 Difference]: Start difference. First operand 6182 states and 8655 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:24:42,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:42,243 INFO L93 Difference]: Finished difference Result 16210 states and 22751 transitions. [2023-11-19 05:24:42,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:24:42,245 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (5), 2 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 57 [2023-11-19 05:24:42,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:42,360 INFO L225 Difference]: With dead ends: 16210 [2023-11-19 05:24:42,360 INFO L226 Difference]: Without dead ends: 10034 [2023-11-19 05:24:42,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-19 05:24:42,389 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 460 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:42,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 416 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:24:42,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10034 states. [2023-11-19 05:24:43,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10034 to 9192. [2023-11-19 05:24:43,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9192 states, 7679 states have (on average 1.391196770412814) internal successors, (10683), 7672 states have internal predecessors, (10683), 936 states have call successors, (936), 496 states have call predecessors, (936), 576 states have return successors, (1160), 1024 states have call predecessors, (1160), 936 states have call successors, (1160) [2023-11-19 05:24:43,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9192 states to 9192 states and 12779 transitions. [2023-11-19 05:24:43,413 INFO L78 Accepts]: Start accepts. Automaton has 9192 states and 12779 transitions. Word has length 57 [2023-11-19 05:24:43,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:43,417 INFO L495 AbstractCegarLoop]: Abstraction has 9192 states and 12779 transitions. [2023-11-19 05:24:43,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:24:43,419 INFO L276 IsEmpty]: Start isEmpty. Operand 9192 states and 12779 transitions. [2023-11-19 05:24:43,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-19 05:24:43,421 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:43,421 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] [2023-11-19 05:24:43,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 05:24:43,422 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:43,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:43,423 INFO L85 PathProgramCache]: Analyzing trace with hash 570991383, now seen corresponding path program 1 times [2023-11-19 05:24:43,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:43,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136247509] [2023-11-19 05:24:43,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:43,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:24:43,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:43,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136247509] [2023-11-19 05:24:43,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136247509] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:43,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:24:43,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:24:43,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465019296] [2023-11-19 05:24:43,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:43,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:24:43,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:43,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:24:43,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:24:43,773 INFO L87 Difference]: Start difference. First operand 9192 states and 12779 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:24:45,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:45,428 INFO L93 Difference]: Finished difference Result 23946 states and 33369 transitions. [2023-11-19 05:24:45,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:24:45,429 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (5), 2 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 59 [2023-11-19 05:24:45,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:45,556 INFO L225 Difference]: With dead ends: 23946 [2023-11-19 05:24:45,557 INFO L226 Difference]: Without dead ends: 14760 [2023-11-19 05:24:45,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-19 05:24:45,594 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 458 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:45,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 477 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:24:45,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14760 states. [2023-11-19 05:24:46,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14760 to 13726. [2023-11-19 05:24:46,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13726 states, 11461 states have (on average 1.381991100253032) internal successors, (15839), 11434 states have internal predecessors, (15839), 1400 states have call successors, (1400), 752 states have call predecessors, (1400), 864 states have return successors, (1704), 1540 states have call predecessors, (1704), 1400 states have call successors, (1704) [2023-11-19 05:24:47,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13726 states to 13726 states and 18943 transitions. [2023-11-19 05:24:47,012 INFO L78 Accepts]: Start accepts. Automaton has 13726 states and 18943 transitions. Word has length 59 [2023-11-19 05:24:47,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:47,013 INFO L495 AbstractCegarLoop]: Abstraction has 13726 states and 18943 transitions. [2023-11-19 05:24:47,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:24:47,014 INFO L276 IsEmpty]: Start isEmpty. Operand 13726 states and 18943 transitions. [2023-11-19 05:24:47,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-19 05:24:47,015 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:47,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:47,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 05:24:47,016 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:47,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:47,017 INFO L85 PathProgramCache]: Analyzing trace with hash -633722020, now seen corresponding path program 1 times [2023-11-19 05:24:47,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:47,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540382964] [2023-11-19 05:24:47,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:47,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:47,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:47,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:24:47,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:47,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540382964] [2023-11-19 05:24:47,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540382964] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:47,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:24:47,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:24:47,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735906611] [2023-11-19 05:24:47,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:47,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:24:47,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:47,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:24:47,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:24:47,280 INFO L87 Difference]: Start difference. First operand 13726 states and 18943 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:24:49,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:49,413 INFO L93 Difference]: Finished difference Result 35180 states and 48629 transitions. [2023-11-19 05:24:49,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:24:49,414 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2023-11-19 05:24:49,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:49,517 INFO L225 Difference]: With dead ends: 35180 [2023-11-19 05:24:49,517 INFO L226 Difference]: Without dead ends: 21460 [2023-11-19 05:24:49,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-19 05:24:49,570 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 448 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:49,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 483 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:24:49,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21460 states. [2023-11-19 05:24:51,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21460 to 20594. [2023-11-19 05:24:51,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20594 states, 17210 states have (on average 1.3733875653689716) internal successors, (23636), 17153 states have internal predecessors, (23636), 2091 states have call successors, (2091), 1140 states have call predecessors, (2091), 1292 states have return successors, (2493), 2301 states have call predecessors, (2493), 2091 states have call successors, (2493) [2023-11-19 05:24:51,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20594 states to 20594 states and 28220 transitions. [2023-11-19 05:24:51,917 INFO L78 Accepts]: Start accepts. Automaton has 20594 states and 28220 transitions. Word has length 61 [2023-11-19 05:24:51,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:51,917 INFO L495 AbstractCegarLoop]: Abstraction has 20594 states and 28220 transitions. [2023-11-19 05:24:51,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:24:51,918 INFO L276 IsEmpty]: Start isEmpty. Operand 20594 states and 28220 transitions. [2023-11-19 05:24:51,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-19 05:24:51,919 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:51,919 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] [2023-11-19 05:24:51,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 05:24:51,920 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:51,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:51,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1448198239, now seen corresponding path program 1 times [2023-11-19 05:24:51,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:51,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081009905] [2023-11-19 05:24:51,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:51,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:51,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:24:51,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:51,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081009905] [2023-11-19 05:24:51,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081009905] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:51,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:24:51,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:24:51,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996612434] [2023-11-19 05:24:51,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:51,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:24:51,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:51,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:24:51,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:24:51,986 INFO L87 Difference]: Start difference. First operand 20594 states and 28220 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-19 05:24:55,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:55,089 INFO L93 Difference]: Finished difference Result 61283 states and 85071 transitions. [2023-11-19 05:24:55,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:24:55,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 63 [2023-11-19 05:24:55,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:55,330 INFO L225 Difference]: With dead ends: 61283 [2023-11-19 05:24:55,330 INFO L226 Difference]: Without dead ends: 40694 [2023-11-19 05:24:55,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:24:55,370 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 143 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:55,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 285 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:24:55,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40694 states. [2023-11-19 05:24:58,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40694 to 40500. [2023-11-19 05:24:58,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40500 states, 33737 states have (on average 1.352135637430714) internal successors, (45617), 33622 states have internal predecessors, (45617), 4178 states have call successors, (4178), 2280 states have call predecessors, (4178), 2584 states have return successors, (4982), 4598 states have call predecessors, (4982), 4178 states have call successors, (4982) [2023-11-19 05:24:58,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40500 states to 40500 states and 54777 transitions. [2023-11-19 05:24:58,514 INFO L78 Accepts]: Start accepts. Automaton has 40500 states and 54777 transitions. Word has length 63 [2023-11-19 05:24:58,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:58,515 INFO L495 AbstractCegarLoop]: Abstraction has 40500 states and 54777 transitions. [2023-11-19 05:24:58,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-19 05:24:58,515 INFO L276 IsEmpty]: Start isEmpty. Operand 40500 states and 54777 transitions. [2023-11-19 05:24:58,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-19 05:24:58,538 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:58,538 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:58,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 05:24:58,539 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:58,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:58,540 INFO L85 PathProgramCache]: Analyzing trace with hash -463998025, now seen corresponding path program 1 times [2023-11-19 05:24:58,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:58,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648026667] [2023-11-19 05:24:58,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:58,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:58,976 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:24:58,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:58,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648026667] [2023-11-19 05:24:58,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648026667] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:24:58,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804629794] [2023-11-19 05:24:58,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:58,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:24:58,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2a62fe-2e1b-4a7c-b449-baac474178c1/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:24:58,985 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2a62fe-2e1b-4a7c-b449-baac474178c1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:24:59,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2a62fe-2e1b-4a7c-b449-baac474178c1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:24:59,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:59,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:24:59,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:24:59,281 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:24:59,281 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:24:59,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804629794] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:59,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:24:59,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-19 05:24:59,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143434785] [2023-11-19 05:24:59,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:59,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:24:59,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:59,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:24:59,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:24:59,286 INFO L87 Difference]: Start difference. First operand 40500 states and 54777 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 05:25:03,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:25:03,718 INFO L93 Difference]: Finished difference Result 76929 states and 105673 transitions. [2023-11-19 05:25:03,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:25:03,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 90 [2023-11-19 05:25:03,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:25:04,081 INFO L225 Difference]: With dead ends: 76929 [2023-11-19 05:25:04,081 INFO L226 Difference]: Without dead ends: 52475 [2023-11-19 05:25:04,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:25:04,164 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 113 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:25:04,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 417 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:25:04,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52475 states. [2023-11-19 05:25:07,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52475 to 43076. [2023-11-19 05:25:07,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43076 states, 36317 states have (on average 1.3640168516121927) internal successors, (49537), 36260 states have internal predecessors, (49537), 4224 states have call successors, (4224), 2382 states have call predecessors, (4224), 2534 states have return successors, (4626), 4434 states have call predecessors, (4626), 4224 states have call successors, (4626) [2023-11-19 05:25:08,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43076 states to 43076 states and 58387 transitions. [2023-11-19 05:25:08,065 INFO L78 Accepts]: Start accepts. Automaton has 43076 states and 58387 transitions. Word has length 90 [2023-11-19 05:25:08,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:25:08,069 INFO L495 AbstractCegarLoop]: Abstraction has 43076 states and 58387 transitions. [2023-11-19 05:25:08,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 05:25:08,069 INFO L276 IsEmpty]: Start isEmpty. Operand 43076 states and 58387 transitions. [2023-11-19 05:25:08,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-19 05:25:08,140 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:25:08,140 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:25:08,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2a62fe-2e1b-4a7c-b449-baac474178c1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 05:25:08,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2a62fe-2e1b-4a7c-b449-baac474178c1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 05:25:08,363 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:25:08,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:25:08,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1045545316, now seen corresponding path program 1 times [2023-11-19 05:25:08,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:25:08,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630828746] [2023-11-19 05:25:08,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:08,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:25:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:08,552 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 05:25:08,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:25:08,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630828746] [2023-11-19 05:25:08,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630828746] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:25:08,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203619918] [2023-11-19 05:25:08,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:08,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:08,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2a62fe-2e1b-4a7c-b449-baac474178c1/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:25:08,556 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2a62fe-2e1b-4a7c-b449-baac474178c1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:25:08,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2a62fe-2e1b-4a7c-b449-baac474178c1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:25:08,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:08,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:25:08,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:25:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:25:09,062 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:25:09,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203619918] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:25:09,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:25:09,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-19 05:25:09,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347839649] [2023-11-19 05:25:09,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:25:09,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:25:09,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:25:09,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:25:09,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:25:09,065 INFO L87 Difference]: Start difference. First operand 43076 states and 58387 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-19 05:25:11,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:25:11,927 INFO L93 Difference]: Finished difference Result 83166 states and 113629 transitions. [2023-11-19 05:25:11,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:25:11,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 123 [2023-11-19 05:25:11,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:25:12,093 INFO L225 Difference]: With dead ends: 83166 [2023-11-19 05:25:12,093 INFO L226 Difference]: Without dead ends: 54022 [2023-11-19 05:25:12,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:25:12,142 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 99 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:25:12,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 407 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:25:12,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54022 states.