./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.16.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee08342-1ade-476c-8673-2257a0bf33b4/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee08342-1ade-476c-8673-2257a0bf33b4/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee08342-1ade-476c-8673-2257a0bf33b4/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee08342-1ade-476c-8673-2257a0bf33b4/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.16.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee08342-1ade-476c-8673-2257a0bf33b4/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee08342-1ade-476c-8673-2257a0bf33b4/bin/utaipan-verify-NcY6lQBIFX --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 45519c8273c53879cf6a170ed74d5bc0be814b1f3243ce6c30d1d3efe9a3cf32 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:12:06,040 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:12:06,130 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee08342-1ade-476c-8673-2257a0bf33b4/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:12:06,138 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:12:06,138 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:12:06,182 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:12:06,183 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:12:06,183 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:12:06,185 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:12:06,189 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:12:06,190 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:12:06,191 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:12:06,192 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:12:06,193 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:12:06,194 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:12:06,194 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:12:06,194 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:12:06,195 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:12:06,195 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:12:06,196 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:12:06,196 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:12:06,196 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:12:06,198 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:12:06,198 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:12:06,198 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:12:06,199 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:12:06,199 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:12:06,199 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:12:06,200 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:12:06,200 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:12:06,202 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:12:06,202 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:12:06,202 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:12:06,202 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:12:06,202 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:12:06,203 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:12:06,203 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:12:06,203 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:12:06,203 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:12:06,204 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:12:06,204 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:12:06,204 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:12:06,204 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:12:06,205 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:12:06,205 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:12:06,205 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_cee08342-1ade-476c-8673-2257a0bf33b4/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee08342-1ade-476c-8673-2257a0bf33b4/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45519c8273c53879cf6a170ed74d5bc0be814b1f3243ce6c30d1d3efe9a3cf32 [2023-11-12 00:12:06,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:12:06,535 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:12:06,538 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:12:06,539 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:12:06,540 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:12:06,542 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee08342-1ade-476c-8673-2257a0bf33b4/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/systemc/transmitter.16.cil.c [2023-11-12 00:12:09,656 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:12:10,069 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:12:10,077 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee08342-1ade-476c-8673-2257a0bf33b4/sv-benchmarks/c/systemc/transmitter.16.cil.c [2023-11-12 00:12:10,094 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee08342-1ade-476c-8673-2257a0bf33b4/bin/utaipan-verify-NcY6lQBIFX/data/4b40d25c6/d6b7cb24a21c45e795459cd4c7766bf7/FLAG33b4a1e11 [2023-11-12 00:12:10,110 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee08342-1ade-476c-8673-2257a0bf33b4/bin/utaipan-verify-NcY6lQBIFX/data/4b40d25c6/d6b7cb24a21c45e795459cd4c7766bf7 [2023-11-12 00:12:10,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:12:10,115 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:12:10,116 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:12:10,117 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:12:10,122 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:12:10,123 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:12:10" (1/1) ... [2023-11-12 00:12:10,124 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@457df8f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:10, skipping insertion in model container [2023-11-12 00:12:10,125 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:12:10" (1/1) ... [2023-11-12 00:12:10,195 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:12:10,368 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_cee08342-1ade-476c-8673-2257a0bf33b4/sv-benchmarks/c/systemc/transmitter.16.cil.c[706,719] [2023-11-12 00:12:10,525 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:12:10,542 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:12:10,556 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_cee08342-1ade-476c-8673-2257a0bf33b4/sv-benchmarks/c/systemc/transmitter.16.cil.c[706,719] [2023-11-12 00:12:10,631 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:12:10,660 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:12:10,667 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:10 WrapperNode [2023-11-12 00:12:10,668 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:12:10,669 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:12:10,669 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:12:10,670 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:12:10,678 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:10" (1/1) ... [2023-11-12 00:12:10,712 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:10" (1/1) ... [2023-11-12 00:12:10,777 INFO L138 Inliner]: procedures = 56, calls = 71, calls flagged for inlining = 40, calls inlined = 40, statements flattened = 974 [2023-11-12 00:12:10,777 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:12:10,778 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:12:10,778 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:12:10,778 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:12:10,788 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:10" (1/1) ... [2023-11-12 00:12:10,788 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:10" (1/1) ... [2023-11-12 00:12:10,794 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:10" (1/1) ... [2023-11-12 00:12:10,794 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:10" (1/1) ... [2023-11-12 00:12:10,813 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:10" (1/1) ... [2023-11-12 00:12:10,828 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:10" (1/1) ... [2023-11-12 00:12:10,832 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:10" (1/1) ... [2023-11-12 00:12:10,837 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:10" (1/1) ... [2023-11-12 00:12:10,844 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:12:10,845 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:12:10,846 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:12:10,846 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:12:10,847 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:10" (1/1) ... [2023-11-12 00:12:10,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:12:10,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee08342-1ade-476c-8673-2257a0bf33b4/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:12:10,884 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee08342-1ade-476c-8673-2257a0bf33b4/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:12:10,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee08342-1ade-476c-8673-2257a0bf33b4/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:12:10,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:12:10,923 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-12 00:12:10,923 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-12 00:12:10,923 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-12 00:12:10,923 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-12 00:12:10,923 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-12 00:12:10,923 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-12 00:12:10,924 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-12 00:12:10,924 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-12 00:12:10,924 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-12 00:12:10,924 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-12 00:12:10,924 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-12 00:12:10,925 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-12 00:12:10,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:12:10,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:12:10,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:12:11,070 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:12:11,073 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:12:12,092 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:12:12,901 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:12:12,902 INFO L302 CfgBuilder]: Removed 18 assume(true) statements. [2023-11-12 00:12:12,906 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:12:12 BoogieIcfgContainer [2023-11-12 00:12:12,906 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:12:12,909 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:12:12,910 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:12:12,914 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:12:12,914 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:12:10" (1/3) ... [2023-11-12 00:12:12,915 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a9983b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:12:12, skipping insertion in model container [2023-11-12 00:12:12,916 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:10" (2/3) ... [2023-11-12 00:12:12,918 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a9983b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:12:12, skipping insertion in model container [2023-11-12 00:12:12,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:12:12" (3/3) ... [2023-11-12 00:12:12,920 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.16.cil.c [2023-11-12 00:12:12,939 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:12:12,940 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:12:13,000 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:12:13,008 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;@d7565b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:12:13,009 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:12:13,015 INFO L276 IsEmpty]: Start isEmpty. Operand has 210 states, 176 states have (on average 1.5113636363636365) internal successors, (266), 178 states have internal predecessors, (266), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-12 00:12:13,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-12 00:12:13,028 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:13,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:12:13,030 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:13,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:13,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1866267170, now seen corresponding path program 1 times [2023-11-12 00:12:13,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:13,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971847351] [2023-11-12 00:12:13,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:13,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:12:13,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:13,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971847351] [2023-11-12 00:12:13,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971847351] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:12:13,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:12:13,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:12:13,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141369429] [2023-11-12 00:12:13,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:12:13,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:12:13,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:13,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:12:13,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:12:13,742 INFO L87 Difference]: Start difference. First operand has 210 states, 176 states have (on average 1.5113636363636365) internal successors, (266), 178 states have internal predecessors, (266), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:12:14,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:14,246 INFO L93 Difference]: Finished difference Result 613 states and 958 transitions. [2023-11-12 00:12:14,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:12:14,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2023-11-12 00:12:14,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:14,263 INFO L225 Difference]: With dead ends: 613 [2023-11-12 00:12:14,263 INFO L226 Difference]: Without dead ends: 404 [2023-11-12 00:12:14,270 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 [2023-11-12 00:12:14,274 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 551 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:14,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 898 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:12:14,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2023-11-12 00:12:14,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 401. [2023-11-12 00:12:14,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 341 states have (on average 1.4721407624633431) internal successors, (502), 342 states have internal predecessors, (502), 47 states have call successors, (47), 12 states have call predecessors, (47), 12 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2023-11-12 00:12:14,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 596 transitions. [2023-11-12 00:12:14,357 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 596 transitions. Word has length 70 [2023-11-12 00:12:14,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:14,358 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 596 transitions. [2023-11-12 00:12:14,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:12:14,358 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 596 transitions. [2023-11-12 00:12:14,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-12 00:12:14,362 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:14,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:12:14,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:12:14,363 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:14,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:14,364 INFO L85 PathProgramCache]: Analyzing trace with hash -40217023, now seen corresponding path program 1 times [2023-11-12 00:12:14,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:14,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543559297] [2023-11-12 00:12:14,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:14,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:14,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:14,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:12:14,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:14,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543559297] [2023-11-12 00:12:14,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543559297] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:12:14,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:12:14,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:12:14,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6567568] [2023-11-12 00:12:14,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:12:14,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:12:14,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:14,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:12:14,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:12:14,652 INFO L87 Difference]: Start difference. First operand 401 states and 596 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:12:15,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:15,566 INFO L93 Difference]: Finished difference Result 1378 states and 2072 transitions. [2023-11-12 00:12:15,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:12:15,567 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2023-11-12 00:12:15,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:15,575 INFO L225 Difference]: With dead ends: 1378 [2023-11-12 00:12:15,575 INFO L226 Difference]: Without dead ends: 955 [2023-11-12 00:12:15,577 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 [2023-11-12 00:12:15,579 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 1185 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:15,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 1365 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:12:15,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2023-11-12 00:12:15,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 943. [2023-11-12 00:12:15,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 822 states have (on average 1.4610705596107056) internal successors, (1201), 811 states have internal predecessors, (1201), 92 states have call successors, (92), 26 states have call predecessors, (92), 28 states have return successors, (106), 106 states have call predecessors, (106), 92 states have call successors, (106) [2023-11-12 00:12:15,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1399 transitions. [2023-11-12 00:12:15,654 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1399 transitions. Word has length 70 [2023-11-12 00:12:15,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:15,655 INFO L495 AbstractCegarLoop]: Abstraction has 943 states and 1399 transitions. [2023-11-12 00:12:15,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:12:15,655 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1399 transitions. [2023-11-12 00:12:15,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-12 00:12:15,658 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:15,659 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:12:15,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:12:15,659 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:15,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:15,660 INFO L85 PathProgramCache]: Analyzing trace with hash 62584224, now seen corresponding path program 1 times [2023-11-12 00:12:15,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:15,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919559777] [2023-11-12 00:12:15,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:15,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:15,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:12:15,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:15,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919559777] [2023-11-12 00:12:15,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919559777] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:12:15,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:12:15,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:12:15,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862781700] [2023-11-12 00:12:15,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:12:15,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:12:15,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:15,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:12:15,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:12:15,891 INFO L87 Difference]: Start difference. First operand 943 states and 1399 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:12:16,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:16,738 INFO L93 Difference]: Finished difference Result 3323 states and 4994 transitions. [2023-11-12 00:12:16,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:12:16,739 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2023-11-12 00:12:16,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:16,755 INFO L225 Difference]: With dead ends: 3323 [2023-11-12 00:12:16,756 INFO L226 Difference]: Without dead ends: 2334 [2023-11-12 00:12:16,760 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 [2023-11-12 00:12:16,762 INFO L413 NwaCegarLoop]: 482 mSDtfsCounter, 1185 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:16,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 1077 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:12:16,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2023-11-12 00:12:16,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 1806. [2023-11-12 00:12:16,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1577 states have (on average 1.4654407102092581) internal successors, (2311), 1567 states have internal predecessors, (2311), 172 states have call successors, (172), 50 states have call predecessors, (172), 56 states have return successors, (213), 189 states have call predecessors, (213), 172 states have call successors, (213) [2023-11-12 00:12:16,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 2696 transitions. [2023-11-12 00:12:16,885 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 2696 transitions. Word has length 70 [2023-11-12 00:12:16,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:16,886 INFO L495 AbstractCegarLoop]: Abstraction has 1806 states and 2696 transitions. [2023-11-12 00:12:16,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:12:16,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 2696 transitions. [2023-11-12 00:12:16,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-12 00:12:16,888 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:16,889 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:12:16,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:12:16,889 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:16,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:16,890 INFO L85 PathProgramCache]: Analyzing trace with hash -2038256991, now seen corresponding path program 1 times [2023-11-12 00:12:16,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:16,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766376624] [2023-11-12 00:12:16,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:16,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:17,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:12:17,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:17,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766376624] [2023-11-12 00:12:17,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766376624] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:12:17,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:12:17,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:12:17,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913386596] [2023-11-12 00:12:17,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:12:17,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:12:17,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:17,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:12:17,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:12:17,058 INFO L87 Difference]: Start difference. First operand 1806 states and 2696 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:12:17,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:17,967 INFO L93 Difference]: Finished difference Result 6294 states and 9547 transitions. [2023-11-12 00:12:17,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:12:17,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2023-11-12 00:12:17,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:18,003 INFO L225 Difference]: With dead ends: 6294 [2023-11-12 00:12:18,003 INFO L226 Difference]: Without dead ends: 4395 [2023-11-12 00:12:18,015 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 [2023-11-12 00:12:18,024 INFO L413 NwaCegarLoop]: 482 mSDtfsCounter, 1185 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:18,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 1077 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:12:18,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4395 states. [2023-11-12 00:12:18,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4395 to 3506. [2023-11-12 00:12:18,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3506 states, 3065 states have (on average 1.466557911908646) internal successors, (4495), 3059 states have internal predecessors, (4495), 328 states have call successors, (328), 98 states have call predecessors, (328), 112 states have return successors, (421), 349 states have call predecessors, (421), 328 states have call successors, (421) [2023-11-12 00:12:18,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 5244 transitions. [2023-11-12 00:12:18,279 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 5244 transitions. Word has length 70 [2023-11-12 00:12:18,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:18,280 INFO L495 AbstractCegarLoop]: Abstraction has 3506 states and 5244 transitions. [2023-11-12 00:12:18,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:12:18,280 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 5244 transitions. [2023-11-12 00:12:18,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-12 00:12:18,282 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:18,282 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:12:18,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:12:18,283 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:18,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:18,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1383232610, now seen corresponding path program 1 times [2023-11-12 00:12:18,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:18,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035432862] [2023-11-12 00:12:18,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:18,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:12:18,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:18,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035432862] [2023-11-12 00:12:18,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035432862] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:12:18,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:12:18,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:12:18,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313143809] [2023-11-12 00:12:18,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:12:18,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:12:18,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:18,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:12:18,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:12:18,444 INFO L87 Difference]: Start difference. First operand 3506 states and 5244 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:12:19,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:19,219 INFO L93 Difference]: Finished difference Result 10451 states and 15907 transitions. [2023-11-12 00:12:19,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:12:19,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2023-11-12 00:12:19,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:19,274 INFO L225 Difference]: With dead ends: 10451 [2023-11-12 00:12:19,274 INFO L226 Difference]: Without dead ends: 6950 [2023-11-12 00:12:19,288 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 [2023-11-12 00:12:19,291 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 572 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:19,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 896 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:12:19,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6950 states. [2023-11-12 00:12:19,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6950 to 6930. [2023-11-12 00:12:19,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6930 states, 6069 states have (on average 1.458230350963915) internal successors, (8850), 6057 states have internal predecessors, (8850), 636 states have call successors, (636), 196 states have call predecessors, (636), 224 states have return successors, (815), 677 states have call predecessors, (815), 636 states have call successors, (815) [2023-11-12 00:12:19,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6930 states to 6930 states and 10301 transitions. [2023-11-12 00:12:19,769 INFO L78 Accepts]: Start accepts. Automaton has 6930 states and 10301 transitions. Word has length 70 [2023-11-12 00:12:19,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:19,770 INFO L495 AbstractCegarLoop]: Abstraction has 6930 states and 10301 transitions. [2023-11-12 00:12:19,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:12:19,770 INFO L276 IsEmpty]: Start isEmpty. Operand 6930 states and 10301 transitions. [2023-11-12 00:12:19,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-12 00:12:19,772 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:19,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:12:19,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:12:19,772 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:19,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:19,773 INFO L85 PathProgramCache]: Analyzing trace with hash 426304227, now seen corresponding path program 1 times [2023-11-12 00:12:19,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:19,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15439977] [2023-11-12 00:12:19,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:19,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:12:19,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:19,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15439977] [2023-11-12 00:12:19,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15439977] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:12:19,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:12:19,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:12:19,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944380866] [2023-11-12 00:12:19,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:12:19,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:12:19,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:19,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:12:19,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:12:19,925 INFO L87 Difference]: Start difference. First operand 6930 states and 10301 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:12:21,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:21,361 INFO L93 Difference]: Finished difference Result 23650 states and 35786 transitions. [2023-11-12 00:12:21,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:12:21,367 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2023-11-12 00:12:21,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:21,524 INFO L225 Difference]: With dead ends: 23650 [2023-11-12 00:12:21,524 INFO L226 Difference]: Without dead ends: 16353 [2023-11-12 00:12:21,561 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 [2023-11-12 00:12:21,563 INFO L413 NwaCegarLoop]: 482 mSDtfsCounter, 1185 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:21,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 1077 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:12:21,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16353 states. [2023-11-12 00:12:22,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16353 to 13563. [2023-11-12 00:12:22,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13563 states, 11886 states have (on average 1.4569241124011443) internal successors, (17317), 11890 states have internal predecessors, (17317), 1228 states have call successors, (1228), 388 states have call predecessors, (1228), 448 states have return successors, (1599), 1285 states have call predecessors, (1599), 1228 states have call successors, (1599) [2023-11-12 00:12:22,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13563 states to 13563 states and 20144 transitions. [2023-11-12 00:12:22,532 INFO L78 Accepts]: Start accepts. Automaton has 13563 states and 20144 transitions. Word has length 70 [2023-11-12 00:12:22,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:22,532 INFO L495 AbstractCegarLoop]: Abstraction has 13563 states and 20144 transitions. [2023-11-12 00:12:22,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:12:22,533 INFO L276 IsEmpty]: Start isEmpty. Operand 13563 states and 20144 transitions. [2023-11-12 00:12:22,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-12 00:12:22,534 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:22,534 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:12:22,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:12:22,534 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:22,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:22,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1150253532, now seen corresponding path program 1 times [2023-11-12 00:12:22,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:22,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212330147] [2023-11-12 00:12:22,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:22,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:12:22,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:22,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212330147] [2023-11-12 00:12:22,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212330147] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:12:22,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:12:22,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:12:22,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445052459] [2023-11-12 00:12:22,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:12:22,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:12:22,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:22,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:12:22,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:12:22,840 INFO L87 Difference]: Start difference. First operand 13563 states and 20144 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:12:24,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:24,987 INFO L93 Difference]: Finished difference Result 45709 states and 69155 transitions. [2023-11-12 00:12:24,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:12:24,987 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2023-11-12 00:12:24,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:25,151 INFO L225 Difference]: With dead ends: 45709 [2023-11-12 00:12:25,152 INFO L226 Difference]: Without dead ends: 31427 [2023-11-12 00:12:25,221 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 [2023-11-12 00:12:25,222 INFO L413 NwaCegarLoop]: 482 mSDtfsCounter, 1185 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:25,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 1077 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:12:25,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31427 states. [2023-11-12 00:12:26,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31427 to 26685. [2023-11-12 00:12:27,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26685 states, 23408 states have (on average 1.4546736158578264) internal successors, (34051), 23444 states have internal predecessors, (34051), 2380 states have call successors, (2380), 772 states have call predecessors, (2380), 896 states have return successors, (3119), 2469 states have call predecessors, (3119), 2380 states have call successors, (3119) [2023-11-12 00:12:27,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26685 states to 26685 states and 39550 transitions. [2023-11-12 00:12:27,193 INFO L78 Accepts]: Start accepts. Automaton has 26685 states and 39550 transitions. Word has length 70 [2023-11-12 00:12:27,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:27,194 INFO L495 AbstractCegarLoop]: Abstraction has 26685 states and 39550 transitions. [2023-11-12 00:12:27,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:12:27,195 INFO L276 IsEmpty]: Start isEmpty. Operand 26685 states and 39550 transitions. [2023-11-12 00:12:27,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-12 00:12:27,199 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:27,199 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:12:27,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 00:12:27,200 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:27,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:27,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1472196133, now seen corresponding path program 1 times [2023-11-12 00:12:27,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:27,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471129120] [2023-11-12 00:12:27,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:27,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:27,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:12:27,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:27,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471129120] [2023-11-12 00:12:27,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471129120] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:12:27,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:12:27,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:12:27,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453261677] [2023-11-12 00:12:27,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:12:27,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:12:27,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:27,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:12:27,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:12:27,390 INFO L87 Difference]: Start difference. First operand 26685 states and 39550 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:12:30,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:30,409 INFO L93 Difference]: Finished difference Result 89323 states and 134873 transitions. [2023-11-12 00:12:30,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:12:30,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2023-11-12 00:12:30,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:30,687 INFO L225 Difference]: With dead ends: 89323 [2023-11-12 00:12:30,687 INFO L226 Difference]: Without dead ends: 61231 [2023-11-12 00:12:30,775 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 [2023-11-12 00:12:30,776 INFO L413 NwaCegarLoop]: 482 mSDtfsCounter, 1185 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:30,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 1077 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 00:12:30,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61231 states. [2023-11-12 00:12:34,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61231 to 52665. [2023-11-12 00:12:34,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52665 states, 46252 states have (on average 1.4519372135259017) internal successors, (67155), 46352 states have internal predecessors, (67155), 4620 states have call successors, (4620), 1540 states have call predecessors, (4620), 1792 states have return successors, (6063), 4773 states have call predecessors, (6063), 4620 states have call successors, (6063) [2023-11-12 00:12:34,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52665 states to 52665 states and 77838 transitions. [2023-11-12 00:12:34,367 INFO L78 Accepts]: Start accepts. Automaton has 52665 states and 77838 transitions. Word has length 70 [2023-11-12 00:12:34,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:34,367 INFO L495 AbstractCegarLoop]: Abstraction has 52665 states and 77838 transitions. [2023-11-12 00:12:34,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:12:34,368 INFO L276 IsEmpty]: Start isEmpty. Operand 52665 states and 77838 transitions. [2023-11-12 00:12:34,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-12 00:12:34,369 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:34,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:12:34,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 00:12:34,370 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:34,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:34,370 INFO L85 PathProgramCache]: Analyzing trace with hash -118198844, now seen corresponding path program 1 times [2023-11-12 00:12:34,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:34,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356301267] [2023-11-12 00:12:34,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:34,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:12:34,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:34,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356301267] [2023-11-12 00:12:34,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356301267] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:12:34,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:12:34,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:12:34,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337906685] [2023-11-12 00:12:34,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:12:34,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:12:34,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:34,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:12:34,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:12:34,488 INFO L87 Difference]: Start difference. First operand 52665 states and 77838 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:12:39,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:39,878 INFO L93 Difference]: Finished difference Result 166010 states and 249279 transitions. [2023-11-12 00:12:39,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:12:39,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2023-11-12 00:12:39,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:40,562 INFO L225 Difference]: With dead ends: 166010 [2023-11-12 00:12:40,563 INFO L226 Difference]: Without dead ends: 113350 [2023-11-12 00:12:40,673 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 [2023-11-12 00:12:40,675 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 569 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:40,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [569 Valid, 1169 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:12:40,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113350 states. [2023-11-12 00:12:45,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113350 to 59171. [2023-11-12 00:12:45,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59171 states, 52367 states have (on average 1.4474764641854603) internal successors, (75800), 52563 states have internal predecessors, (75800), 4815 states have call successors, (4815), 1672 states have call predecessors, (4815), 1988 states have return successors, (6351), 4936 states have call predecessors, (6351), 4815 states have call successors, (6351) [2023-11-12 00:12:45,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59171 states to 59171 states and 86966 transitions. [2023-11-12 00:12:45,390 INFO L78 Accepts]: Start accepts. Automaton has 59171 states and 86966 transitions. Word has length 70 [2023-11-12 00:12:45,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:45,391 INFO L495 AbstractCegarLoop]: Abstraction has 59171 states and 86966 transitions. [2023-11-12 00:12:45,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:12:45,392 INFO L276 IsEmpty]: Start isEmpty. Operand 59171 states and 86966 transitions. [2023-11-12 00:12:45,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-12 00:12:45,393 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:45,393 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:12:45,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 00:12:45,394 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:45,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:45,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1022152867, now seen corresponding path program 1 times [2023-11-12 00:12:45,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:45,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642654765] [2023-11-12 00:12:45,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:45,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:45,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:12:45,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:45,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642654765] [2023-11-12 00:12:45,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642654765] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:12:45,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:12:45,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:12:45,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451331974] [2023-11-12 00:12:45,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:12:45,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:12:45,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:45,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:12:45,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:12:45,801 INFO L87 Difference]: Start difference. First operand 59171 states and 86966 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 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) [2023-11-12 00:12:50,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:50,884 INFO L93 Difference]: Finished difference Result 167640 states and 248161 transitions. [2023-11-12 00:12:50,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:12:50,886 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 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 70 [2023-11-12 00:12:50,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:51,334 INFO L225 Difference]: With dead ends: 167640 [2023-11-12 00:12:51,335 INFO L226 Difference]: Without dead ends: 112500 [2023-11-12 00:12:51,528 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 [2023-11-12 00:12:51,528 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 941 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:51,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [948 Valid, 766 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:12:51,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112500 states.