./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.09.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_c6f2dc91-c95e-48ef-a99d-6aa08dbff7e8/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f2dc91-c95e-48ef-a99d-6aa08dbff7e8/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f2dc91-c95e-48ef-a99d-6aa08dbff7e8/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f2dc91-c95e-48ef-a99d-6aa08dbff7e8/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f2dc91-c95e-48ef-a99d-6aa08dbff7e8/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f2dc91-c95e-48ef-a99d-6aa08dbff7e8/bin/utaipan-verify-QoSU8krkJ5 --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 3945fa4b58cef50cb4b44b435a699812e99a1f6375664d08551274c6b50bee45 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:00:26,560 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:00:26,707 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f2dc91-c95e-48ef-a99d-6aa08dbff7e8/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-21 19:00:26,718 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:00:26,719 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:00:26,764 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:00:26,765 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:00:26,765 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:00:26,766 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:00:26,772 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:00:26,772 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:00:26,773 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:00:26,773 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:00:26,775 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:00:26,776 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:00:26,776 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:00:26,777 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:00:26,777 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:00:26,778 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:00:26,778 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:00:26,781 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:00:26,781 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:00:26,783 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:00:26,783 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:00:26,784 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:00:26,784 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:00:26,785 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:00:26,785 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:00:26,786 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:00:26,786 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:00:26,788 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:00:26,788 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:00:26,788 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:00:26,789 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:00:26,789 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:00:26,789 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:00:26,790 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:00:26,790 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:00:26,790 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:00:26,791 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:00:26,791 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:00:26,791 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:00:26,792 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:00:26,793 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:00:26,793 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:00:26,794 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:00:26,794 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:00:26,794 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_c6f2dc91-c95e-48ef-a99d-6aa08dbff7e8/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f2dc91-c95e-48ef-a99d-6aa08dbff7e8/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3945fa4b58cef50cb4b44b435a699812e99a1f6375664d08551274c6b50bee45 [2023-11-21 19:00:27,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:00:27,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:00:27,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:00:27,211 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:00:27,212 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:00:27,214 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f2dc91-c95e-48ef-a99d-6aa08dbff7e8/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/systemc/transmitter.09.cil.c [2023-11-21 19:00:30,586 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:00:30,931 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:00:30,932 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f2dc91-c95e-48ef-a99d-6aa08dbff7e8/sv-benchmarks/c/systemc/transmitter.09.cil.c [2023-11-21 19:00:30,953 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f2dc91-c95e-48ef-a99d-6aa08dbff7e8/bin/utaipan-verify-QoSU8krkJ5/data/502a906df/5aede67e65814f089cd385b028220d12/FLAG60d60608f [2023-11-21 19:00:30,980 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f2dc91-c95e-48ef-a99d-6aa08dbff7e8/bin/utaipan-verify-QoSU8krkJ5/data/502a906df/5aede67e65814f089cd385b028220d12 [2023-11-21 19:00:30,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:00:30,986 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:00:30,988 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:00:30,988 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:00:31,003 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:00:31,004 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:00:30" (1/1) ... [2023-11-21 19:00:31,005 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5453e13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:31, skipping insertion in model container [2023-11-21 19:00:31,005 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:00:30" (1/1) ... [2023-11-21 19:00:31,076 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:00:31,280 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_c6f2dc91-c95e-48ef-a99d-6aa08dbff7e8/sv-benchmarks/c/systemc/transmitter.09.cil.c[706,719] [2023-11-21 19:00:31,475 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:00:31,494 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:00:31,514 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_c6f2dc91-c95e-48ef-a99d-6aa08dbff7e8/sv-benchmarks/c/systemc/transmitter.09.cil.c[706,719] [2023-11-21 19:00:31,608 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:00:31,636 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:00:31,637 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:31 WrapperNode [2023-11-21 19:00:31,638 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:00:31,639 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:00:31,639 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:00:31,640 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:00:31,650 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:31" (1/1) ... [2023-11-21 19:00:31,680 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:31" (1/1) ... [2023-11-21 19:00:31,738 INFO L138 Inliner]: procedures = 46, calls = 57, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 682 [2023-11-21 19:00:31,738 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:00:31,739 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:00:31,740 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:00:31,740 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:00:31,761 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:31" (1/1) ... [2023-11-21 19:00:31,761 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:31" (1/1) ... [2023-11-21 19:00:31,769 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:31" (1/1) ... [2023-11-21 19:00:31,770 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:31" (1/1) ... [2023-11-21 19:00:31,787 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:31" (1/1) ... [2023-11-21 19:00:31,803 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:31" (1/1) ... [2023-11-21 19:00:31,807 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:31" (1/1) ... [2023-11-21 19:00:31,812 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:31" (1/1) ... [2023-11-21 19:00:31,834 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:00:31,835 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:00:31,836 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:00:31,836 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:00:31,837 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:31" (1/1) ... [2023-11-21 19:00:31,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:00:31,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f2dc91-c95e-48ef-a99d-6aa08dbff7e8/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:00:31,925 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f2dc91-c95e-48ef-a99d-6aa08dbff7e8/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:00:31,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f2dc91-c95e-48ef-a99d-6aa08dbff7e8/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:00:31,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:00:31,973 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-21 19:00:31,973 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-21 19:00:31,973 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-21 19:00:31,973 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-21 19:00:31,973 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-21 19:00:31,974 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-21 19:00:31,974 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-21 19:00:31,974 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-21 19:00:31,974 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-21 19:00:31,974 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-21 19:00:31,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:00:31,975 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-21 19:00:31,975 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-21 19:00:31,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:00:31,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:00:32,141 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:00:32,144 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:00:33,111 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:00:33,773 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:00:33,774 INFO L308 CfgBuilder]: Removed 13 assume(true) statements. [2023-11-21 19:00:33,776 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:00:33 BoogieIcfgContainer [2023-11-21 19:00:33,778 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:00:33,782 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:00:33,782 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:00:33,787 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:00:33,788 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:00:30" (1/3) ... [2023-11-21 19:00:33,789 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78bae544 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:00:33, skipping insertion in model container [2023-11-21 19:00:33,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:31" (2/3) ... [2023-11-21 19:00:33,794 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78bae544 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:00:33, skipping insertion in model container [2023-11-21 19:00:33,794 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:00:33" (3/3) ... [2023-11-21 19:00:33,796 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.09.cil.c [2023-11-21 19:00:33,822 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:00:33,823 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 19:00:33,911 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:00:33,919 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;@2d554158, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:00:33,920 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 19:00:33,927 INFO L276 IsEmpty]: Start isEmpty. Operand has 163 states, 133 states have (on average 1.5112781954887218) internal successors, (201), 135 states have internal predecessors, (201), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-21 19:00:33,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-21 19:00:33,948 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:33,949 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] [2023-11-21 19:00:33,951 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:00:33,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:33,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1545093313, now seen corresponding path program 1 times [2023-11-21 19:00:33,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:33,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729179409] [2023-11-21 19:00:33,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:33,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:34,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:00:34,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:00:34,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729179409] [2023-11-21 19:00:34,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729179409] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:00:34,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:00:34,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:00:34,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337717390] [2023-11-21 19:00:34,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:00:34,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:00:34,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:00:34,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:00:34,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:00:34,805 INFO L87 Difference]: Start difference. First operand has 163 states, 133 states have (on average 1.5112781954887218) internal successors, (201), 135 states have internal predecessors, (201), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2023-11-21 19:00:35,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:00:35,407 INFO L93 Difference]: Finished difference Result 476 states and 727 transitions. [2023-11-21 19:00:35,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:00:35,411 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 65 [2023-11-21 19:00:35,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:00:35,426 INFO L225 Difference]: With dead ends: 476 [2023-11-21 19:00:35,426 INFO L226 Difference]: Without dead ends: 314 [2023-11-21 19:00:35,434 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 [2023-11-21 19:00:35,438 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 428 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 19:00:35,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 674 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 19:00:35,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2023-11-21 19:00:35,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 310. [2023-11-21 19:00:35,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 257 states have (on average 1.4669260700389104) internal successors, (377), 259 states have internal predecessors, (377), 40 states have call successors, (40), 12 states have call predecessors, (40), 12 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-21 19:00:35,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 457 transitions. [2023-11-21 19:00:35,528 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 457 transitions. Word has length 65 [2023-11-21 19:00:35,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:00:35,529 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 457 transitions. [2023-11-21 19:00:35,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2023-11-21 19:00:35,530 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 457 transitions. [2023-11-21 19:00:35,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-21 19:00:35,535 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:35,535 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] [2023-11-21 19:00:35,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:00:35,536 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:00:35,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:35,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1641745344, now seen corresponding path program 1 times [2023-11-21 19:00:35,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:35,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884087794] [2023-11-21 19:00:35,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:35,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:00:35,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:00:35,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884087794] [2023-11-21 19:00:35,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884087794] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:00:35,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:00:35,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 19:00:35,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440513616] [2023-11-21 19:00:35,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:00:35,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:00:35,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:00:35,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:00:35,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:00:35,861 INFO L87 Difference]: Start difference. First operand 310 states and 457 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2023-11-21 19:00:36,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:00:36,882 INFO L93 Difference]: Finished difference Result 1801 states and 2793 transitions. [2023-11-21 19:00:36,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:00:36,883 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 65 [2023-11-21 19:00:36,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:00:36,914 INFO L225 Difference]: With dead ends: 1801 [2023-11-21 19:00:36,915 INFO L226 Difference]: Without dead ends: 1496 [2023-11-21 19:00:36,925 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 [2023-11-21 19:00:36,928 INFO L413 NwaCegarLoop]: 462 mSDtfsCounter, 988 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 19:00:36,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [992 Valid, 1012 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 19:00:36,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2023-11-21 19:00:37,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1460. [2023-11-21 19:00:37,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1227 states have (on average 1.4612876935615322) internal successors, (1793), 1235 states have internal predecessors, (1793), 172 states have call successors, (172), 60 states have call predecessors, (172), 60 states have return successors, (262), 165 states have call predecessors, (262), 172 states have call successors, (262) [2023-11-21 19:00:37,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 2227 transitions. [2023-11-21 19:00:37,122 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 2227 transitions. Word has length 65 [2023-11-21 19:00:37,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:00:37,122 INFO L495 AbstractCegarLoop]: Abstraction has 1460 states and 2227 transitions. [2023-11-21 19:00:37,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2023-11-21 19:00:37,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 2227 transitions. [2023-11-21 19:00:37,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-21 19:00:37,127 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:37,127 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] [2023-11-21 19:00:37,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 19:00:37,128 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:00:37,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:37,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1185018623, now seen corresponding path program 1 times [2023-11-21 19:00:37,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:37,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254465806] [2023-11-21 19:00:37,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:37,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:37,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:37,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:00:37,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:00:37,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254465806] [2023-11-21 19:00:37,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254465806] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:00:37,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:00:37,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 19:00:37,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497066050] [2023-11-21 19:00:37,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:00:37,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:00:37,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:00:37,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:00:37,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:00:37,326 INFO L87 Difference]: Start difference. First operand 1460 states and 2227 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2023-11-21 19:00:38,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:00:38,410 INFO L93 Difference]: Finished difference Result 5763 states and 9043 transitions. [2023-11-21 19:00:38,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:00:38,411 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 65 [2023-11-21 19:00:38,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:00:38,456 INFO L225 Difference]: With dead ends: 5763 [2023-11-21 19:00:38,456 INFO L226 Difference]: Without dead ends: 4308 [2023-11-21 19:00:38,467 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 [2023-11-21 19:00:38,469 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 991 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 19:00:38,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [996 Valid, 1023 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 19:00:38,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4308 states. [2023-11-21 19:00:38,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4308 to 4038. [2023-11-21 19:00:38,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4038 states, 3475 states have (on average 1.4702158273381294) internal successors, (5109), 3441 states have internal predecessors, (5109), 398 states have call successors, (398), 148 states have call predecessors, (398), 164 states have return successors, (784), 449 states have call predecessors, (784), 398 states have call successors, (784) [2023-11-21 19:00:38,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4038 states to 4038 states and 6291 transitions. [2023-11-21 19:00:38,921 INFO L78 Accepts]: Start accepts. Automaton has 4038 states and 6291 transitions. Word has length 65 [2023-11-21 19:00:38,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:00:38,922 INFO L495 AbstractCegarLoop]: Abstraction has 4038 states and 6291 transitions. [2023-11-21 19:00:38,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2023-11-21 19:00:38,923 INFO L276 IsEmpty]: Start isEmpty. Operand 4038 states and 6291 transitions. [2023-11-21 19:00:38,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-21 19:00:38,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:38,925 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] [2023-11-21 19:00:38,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 19:00:38,926 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:00:38,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:38,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1801943904, now seen corresponding path program 1 times [2023-11-21 19:00:38,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:38,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318814640] [2023-11-21 19:00:38,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:38,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:39,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:00:39,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:00:39,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318814640] [2023-11-21 19:00:39,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318814640] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:00:39,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:00:39,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 19:00:39,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779551981] [2023-11-21 19:00:39,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:00:39,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:00:39,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:00:39,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:00:39,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:00:39,137 INFO L87 Difference]: Start difference. First operand 4038 states and 6291 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2023-11-21 19:00:40,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:00:40,532 INFO L93 Difference]: Finished difference Result 14911 states and 24025 transitions. [2023-11-21 19:00:40,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:00:40,533 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 65 [2023-11-21 19:00:40,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:00:40,647 INFO L225 Difference]: With dead ends: 14911 [2023-11-21 19:00:40,647 INFO L226 Difference]: Without dead ends: 10878 [2023-11-21 19:00:40,672 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 [2023-11-21 19:00:40,682 INFO L413 NwaCegarLoop]: 484 mSDtfsCounter, 986 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 991 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 19:00:40,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [991 Valid, 1019 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 19:00:40,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10878 states. [2023-11-21 19:00:41,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10878 to 10270. [2023-11-21 19:00:41,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10270 states, 8957 states have (on average 1.477838562018533) internal successors, (13237), 8785 states have internal predecessors, (13237), 892 states have call successors, (892), 348 states have call predecessors, (892), 420 states have return successors, (2216), 1137 states have call predecessors, (2216), 892 states have call successors, (2216) [2023-11-21 19:00:41,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10270 states to 10270 states and 16345 transitions. [2023-11-21 19:00:41,666 INFO L78 Accepts]: Start accepts. Automaton has 10270 states and 16345 transitions. Word has length 65 [2023-11-21 19:00:41,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:00:41,667 INFO L495 AbstractCegarLoop]: Abstraction has 10270 states and 16345 transitions. [2023-11-21 19:00:41,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2023-11-21 19:00:41,667 INFO L276 IsEmpty]: Start isEmpty. Operand 10270 states and 16345 transitions. [2023-11-21 19:00:41,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-21 19:00:41,670 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:41,670 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] [2023-11-21 19:00:41,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 19:00:41,671 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:00:41,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:41,672 INFO L85 PathProgramCache]: Analyzing trace with hash -2093032193, now seen corresponding path program 1 times [2023-11-21 19:00:41,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:41,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100164181] [2023-11-21 19:00:41,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:41,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:00:41,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:00:41,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100164181] [2023-11-21 19:00:41,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100164181] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:00:41,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:00:41,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 19:00:41,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476394030] [2023-11-21 19:00:41,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:00:41,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:00:41,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:00:41,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:00:41,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:00:41,825 INFO L87 Difference]: Start difference. First operand 10270 states and 16345 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2023-11-21 19:00:44,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:00:44,225 INFO L93 Difference]: Finished difference Result 37215 states and 61723 transitions. [2023-11-21 19:00:44,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:00:44,226 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 65 [2023-11-21 19:00:44,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:00:44,480 INFO L225 Difference]: With dead ends: 37215 [2023-11-21 19:00:44,480 INFO L226 Difference]: Without dead ends: 26950 [2023-11-21 19:00:44,550 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 [2023-11-21 19:00:44,553 INFO L413 NwaCegarLoop]: 484 mSDtfsCounter, 980 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 986 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 19:00:44,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [986 Valid, 1018 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 19:00:44,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26950 states. [2023-11-21 19:00:46,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26950 to 25662. [2023-11-21 19:00:46,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25662 states, 22575 states have (on average 1.4861129568106313) internal successors, (33549), 21981 states have internal predecessors, (33549), 2010 states have call successors, (2010), 820 states have call predecessors, (2010), 1076 states have return successors, (6224), 2861 states have call predecessors, (6224), 2010 states have call successors, (6224) [2023-11-21 19:00:46,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25662 states to 25662 states and 41783 transitions. [2023-11-21 19:00:46,784 INFO L78 Accepts]: Start accepts. Automaton has 25662 states and 41783 transitions. Word has length 65 [2023-11-21 19:00:46,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:00:46,785 INFO L495 AbstractCegarLoop]: Abstraction has 25662 states and 41783 transitions. [2023-11-21 19:00:46,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2023-11-21 19:00:46,786 INFO L276 IsEmpty]: Start isEmpty. Operand 25662 states and 41783 transitions. [2023-11-21 19:00:46,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-21 19:00:46,788 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:46,788 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] [2023-11-21 19:00:46,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 19:00:46,789 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:00:46,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:46,790 INFO L85 PathProgramCache]: Analyzing trace with hash 573284830, now seen corresponding path program 1 times [2023-11-21 19:00:46,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:46,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564586858] [2023-11-21 19:00:46,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:46,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:46,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:00:46,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:00:46,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564586858] [2023-11-21 19:00:46,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564586858] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:00:46,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:00:46,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 19:00:46,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468360389] [2023-11-21 19:00:46,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:00:46,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:00:46,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:00:46,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:00:46,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:00:46,960 INFO L87 Difference]: Start difference. First operand 25662 states and 41783 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2023-11-21 19:00:50,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:00:50,290 INFO L93 Difference]: Finished difference Result 93169 states and 159964 transitions. [2023-11-21 19:00:50,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:00:50,291 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 65 [2023-11-21 19:00:50,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:00:50,801 INFO L225 Difference]: With dead ends: 93169 [2023-11-21 19:00:50,801 INFO L226 Difference]: Without dead ends: 67512 [2023-11-21 19:00:50,903 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 [2023-11-21 19:00:50,904 INFO L413 NwaCegarLoop]: 485 mSDtfsCounter, 976 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 981 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 19:00:50,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [981 Valid, 1015 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 19:00:50,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67512 states. [2023-11-21 19:00:55,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67512 to 64498. [2023-11-21 19:00:55,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64498 states, 56963 states have (on average 1.4893702929972088) internal successors, (84839), 54831 states have internal predecessors, (84839), 4714 states have call successors, (4714), 1980 states have call predecessors, (4714), 2820 states have return successors, (18172), 7687 states have call predecessors, (18172), 4714 states have call successors, (18172) [2023-11-21 19:00:55,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64498 states to 64498 states and 107725 transitions. [2023-11-21 19:00:55,943 INFO L78 Accepts]: Start accepts. Automaton has 64498 states and 107725 transitions. Word has length 65 [2023-11-21 19:00:55,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:00:55,944 INFO L495 AbstractCegarLoop]: Abstraction has 64498 states and 107725 transitions. [2023-11-21 19:00:55,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2023-11-21 19:00:55,944 INFO L276 IsEmpty]: Start isEmpty. Operand 64498 states and 107725 transitions. [2023-11-21 19:00:55,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-21 19:00:55,947 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:55,947 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] [2023-11-21 19:00:55,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 19:00:55,948 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:00:55,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:55,948 INFO L85 PathProgramCache]: Analyzing trace with hash -729906047, now seen corresponding path program 1 times [2023-11-21 19:00:55,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:55,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993482251] [2023-11-21 19:00:55,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:55,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:55,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:56,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:00:56,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:00:56,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993482251] [2023-11-21 19:00:56,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993482251] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:00:56,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:00:56,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 19:00:56,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877942543] [2023-11-21 19:00:56,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:00:56,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:00:56,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:00:56,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:00:56,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:00:56,434 INFO L87 Difference]: Start difference. First operand 64498 states and 107725 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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) [2023-11-21 19:01:00,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:01:00,879 INFO L93 Difference]: Finished difference Result 173723 states and 292546 transitions. [2023-11-21 19:01:00,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 19:01:00,880 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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 69 [2023-11-21 19:01:00,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:01:01,584 INFO L225 Difference]: With dead ends: 173723 [2023-11-21 19:01:01,585 INFO L226 Difference]: Without dead ends: 109231 [2023-11-21 19:01:01,749 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 [2023-11-21 19:01:01,750 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 698 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 19:01:01,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [705 Valid, 654 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 19:01:02,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109231 states. [2023-11-21 19:01:08,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109231 to 102476. [2023-11-21 19:01:08,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102476 states, 90566 states have (on average 1.4764812402005167) internal successors, (133719), 87635 states have internal predecessors, (133719), 7069 states have call successors, (7069), 3160 states have call predecessors, (7069), 4840 states have return successors, (27256), 11681 states have call predecessors, (27256), 7069 states have call successors, (27256) [2023-11-21 19:01:08,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102476 states to 102476 states and 168044 transitions. [2023-11-21 19:01:08,766 INFO L78 Accepts]: Start accepts. Automaton has 102476 states and 168044 transitions. Word has length 69 [2023-11-21 19:01:08,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:01:08,767 INFO L495 AbstractCegarLoop]: Abstraction has 102476 states and 168044 transitions. [2023-11-21 19:01:08,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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) [2023-11-21 19:01:08,767 INFO L276 IsEmpty]: Start isEmpty. Operand 102476 states and 168044 transitions. [2023-11-21 19:01:08,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-21 19:01:08,770 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:01:08,770 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, 1] [2023-11-21 19:01:08,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 19:01:08,771 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:01:08,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:01:08,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1801669997, now seen corresponding path program 1 times [2023-11-21 19:01:08,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:01:08,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082869803] [2023-11-21 19:01:08,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:01:08,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:01:08,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:01:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:01:09,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:01:09,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082869803] [2023-11-21 19:01:09,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082869803] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:01:09,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:01:09,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 19:01:09,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553660817] [2023-11-21 19:01:09,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:01:09,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:01:09,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:01:09,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:01:09,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:01:09,074 INFO L87 Difference]: Start difference. First operand 102476 states and 168044 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 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)