./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.12.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e37eedb-76ac-4809-84fc-838f59f40871/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e37eedb-76ac-4809-84fc-838f59f40871/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e37eedb-76ac-4809-84fc-838f59f40871/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e37eedb-76ac-4809-84fc-838f59f40871/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.12.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e37eedb-76ac-4809-84fc-838f59f40871/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e37eedb-76ac-4809-84fc-838f59f40871/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 062c7418109a213aa13d25a99437d8241cca4f6492c123259890838dc94aff90 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:20:15,829 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:20:15,892 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e37eedb-76ac-4809-84fc-838f59f40871/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 16:20:15,896 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:20:15,897 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:20:15,917 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:20:15,918 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:20:15,918 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:20:15,919 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:20:15,920 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:20:15,920 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:20:15,921 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:20:15,921 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:20:15,922 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:20:15,922 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:20:15,923 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:20:15,923 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:20:15,924 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:20:15,924 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:20:15,925 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:20:15,925 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:20:15,926 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:20:15,927 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:20:15,927 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:20:15,928 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 16:20:15,928 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:20:15,929 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 16:20:15,929 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:20:15,929 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:20:15,930 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:20:15,930 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:20:15,930 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 16:20:15,931 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:20:15,931 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:20:15,931 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:20:15,931 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:20:15,932 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:20:15,932 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:20:15,932 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:20:15,932 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:20:15,932 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:20:15,933 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:20:15,933 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:20:15,933 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:20:15,933 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:20:15,933 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:20:15,933 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:20:15,934 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_0e37eedb-76ac-4809-84fc-838f59f40871/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e37eedb-76ac-4809-84fc-838f59f40871/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 062c7418109a213aa13d25a99437d8241cca4f6492c123259890838dc94aff90 [2023-12-02 16:20:16,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:20:16,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:20:16,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:20:16,151 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:20:16,151 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:20:16,152 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e37eedb-76ac-4809-84fc-838f59f40871/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/systemc/transmitter.12.cil.c [2023-12-02 16:20:18,893 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:20:19,123 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:20:19,124 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e37eedb-76ac-4809-84fc-838f59f40871/sv-benchmarks/c/systemc/transmitter.12.cil.c [2023-12-02 16:20:19,137 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e37eedb-76ac-4809-84fc-838f59f40871/bin/utaipan-verify-nQ1chXbOIh/data/f2cf54d1e/b74df0e9f463491e849ed002d613490e/FLAG4d4451490 [2023-12-02 16:20:19,150 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e37eedb-76ac-4809-84fc-838f59f40871/bin/utaipan-verify-nQ1chXbOIh/data/f2cf54d1e/b74df0e9f463491e849ed002d613490e [2023-12-02 16:20:19,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:20:19,154 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:20:19,156 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:20:19,156 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:20:19,161 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:20:19,162 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:20:19" (1/1) ... [2023-12-02 16:20:19,163 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cdbd3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:19, skipping insertion in model container [2023-12-02 16:20:19,163 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:20:19" (1/1) ... [2023-12-02 16:20:19,216 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:20:19,363 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_0e37eedb-76ac-4809-84fc-838f59f40871/sv-benchmarks/c/systemc/transmitter.12.cil.c[706,719] [2023-12-02 16:20:19,484 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:20:19,498 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:20:19,510 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_0e37eedb-76ac-4809-84fc-838f59f40871/sv-benchmarks/c/systemc/transmitter.12.cil.c[706,719] [2023-12-02 16:20:19,564 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:20:19,585 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:20:19,585 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:19 WrapperNode [2023-12-02 16:20:19,585 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:20:19,586 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:20:19,586 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:20:19,586 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:20:19,592 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:19" (1/1) ... [2023-12-02 16:20:19,604 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:19" (1/1) ... [2023-12-02 16:20:19,639 INFO L138 Inliner]: procedures = 52, calls = 66, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 859 [2023-12-02 16:20:19,639 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:20:19,640 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:20:19,640 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:20:19,640 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:20:19,647 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:19" (1/1) ... [2023-12-02 16:20:19,647 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:19" (1/1) ... [2023-12-02 16:20:19,651 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:19" (1/1) ... [2023-12-02 16:20:19,651 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:19" (1/1) ... [2023-12-02 16:20:19,663 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:19" (1/1) ... [2023-12-02 16:20:19,676 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:19" (1/1) ... [2023-12-02 16:20:19,679 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:19" (1/1) ... [2023-12-02 16:20:19,683 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:19" (1/1) ... [2023-12-02 16:20:19,689 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:20:19,690 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:20:19,690 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:20:19,690 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:20:19,691 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:19" (1/1) ... [2023-12-02 16:20:19,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:20:19,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e37eedb-76ac-4809-84fc-838f59f40871/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:20:19,725 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e37eedb-76ac-4809-84fc-838f59f40871/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:20:19,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e37eedb-76ac-4809-84fc-838f59f40871/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:20:19,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:20:19,767 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-12-02 16:20:19,767 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-12-02 16:20:19,767 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 16:20:19,767 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 16:20:19,767 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-12-02 16:20:19,767 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-12-02 16:20:19,767 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-12-02 16:20:19,768 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-12-02 16:20:19,768 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-12-02 16:20:19,768 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-12-02 16:20:19,768 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-12-02 16:20:19,768 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-12-02 16:20:19,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:20:19,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:20:19,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:20:19,889 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:20:19,891 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:20:20,565 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:20:20,986 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:20:20,987 INFO L309 CfgBuilder]: Removed 16 assume(true) statements. [2023-12-02 16:20:20,988 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:20:20 BoogieIcfgContainer [2023-12-02 16:20:20,988 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:20:20,990 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:20:20,991 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:20:20,993 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:20:20,993 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:20:19" (1/3) ... [2023-12-02 16:20:20,994 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@275329ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:20:20, skipping insertion in model container [2023-12-02 16:20:20,994 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:19" (2/3) ... [2023-12-02 16:20:20,994 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@275329ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:20:20, skipping insertion in model container [2023-12-02 16:20:20,994 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:20:20" (3/3) ... [2023-12-02 16:20:20,995 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.12.cil.c [2023-12-02 16:20:21,013 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:20:21,013 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 16:20:21,073 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:20:21,079 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;@30b5d098, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:20:21,080 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 16:20:21,085 INFO L276 IsEmpty]: Start isEmpty. Operand has 199 states, 166 states have (on average 1.5180722891566265) internal successors, (252), 168 states have internal predecessors, (252), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-12-02 16:20:21,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-02 16:20:21,100 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:20:21,101 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, 1, 1, 1, 1, 1, 1] [2023-12-02 16:20:21,101 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:20:21,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:20:21,107 INFO L85 PathProgramCache]: Analyzing trace with hash -802911613, now seen corresponding path program 1 times [2023-12-02 16:20:21,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:20:21,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259498911] [2023-12-02 16:20:21,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:20:21,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:20:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:20:21,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:20:21,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:20:21,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259498911] [2023-12-02 16:20:21,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259498911] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:20:21,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:20:21,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:20:21,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283078896] [2023-12-02 16:20:21,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:20:21,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:20:21,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:20:21,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:20:21,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:20:21,566 INFO L87 Difference]: Start difference. First operand has 199 states, 166 states have (on average 1.5180722891566265) internal successors, (252), 168 states have internal predecessors, (252), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:20:22,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:20:22,074 INFO L93 Difference]: Finished difference Result 584 states and 901 transitions. [2023-12-02 16:20:22,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:20:22,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 77 [2023-12-02 16:20:22,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:20:22,089 INFO L225 Difference]: With dead ends: 584 [2023-12-02 16:20:22,089 INFO L226 Difference]: Without dead ends: 386 [2023-12-02 16:20:22,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:20:22,098 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 533 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:20:22,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 854 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:20:22,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2023-12-02 16:20:22,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 382. [2023-12-02 16:20:22,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 323 states have (on average 1.4829721362229102) internal successors, (479), 325 states have internal predecessors, (479), 46 states have call successors, (46), 12 states have call predecessors, (46), 12 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2023-12-02 16:20:22,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 571 transitions. [2023-12-02 16:20:22,173 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 571 transitions. Word has length 77 [2023-12-02 16:20:22,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:20:22,173 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 571 transitions. [2023-12-02 16:20:22,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:20:22,174 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 571 transitions. [2023-12-02 16:20:22,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-02 16:20:22,178 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:20:22,178 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, 1, 1, 1, 1, 1, 1] [2023-12-02 16:20:22,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 16:20:22,179 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:20:22,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:20:22,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1334582660, now seen corresponding path program 1 times [2023-12-02 16:20:22,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:20:22,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687565081] [2023-12-02 16:20:22,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:20:22,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:20:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:20:22,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:20:22,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:20:22,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687565081] [2023-12-02 16:20:22,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687565081] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:20:22,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:20:22,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:20:22,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745805989] [2023-12-02 16:20:22,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:20:22,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:20:22,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:20:22,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:20:22,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:20:22,419 INFO L87 Difference]: Start difference. First operand 382 states and 571 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:20:23,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:20:23,452 INFO L93 Difference]: Finished difference Result 2233 states and 3519 transitions. [2023-12-02 16:20:23,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:20:23,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 77 [2023-12-02 16:20:23,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:20:23,473 INFO L225 Difference]: With dead ends: 2233 [2023-12-02 16:20:23,474 INFO L226 Difference]: Without dead ends: 1856 [2023-12-02 16:20:23,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:20:23,479 INFO L413 NwaCegarLoop]: 589 mSDtfsCounter, 1253 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1267 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 16:20:23,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1267 Valid, 1293 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 16:20:23,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2023-12-02 16:20:23,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1820. [2023-12-02 16:20:23,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1557 states have (on average 1.4791265253693) internal successors, (2303), 1565 states have internal predecessors, (2303), 202 states have call successors, (202), 60 states have call predecessors, (202), 60 states have return successors, (316), 195 states have call predecessors, (316), 202 states have call successors, (316) [2023-12-02 16:20:23,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 2821 transitions. [2023-12-02 16:20:23,612 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 2821 transitions. Word has length 77 [2023-12-02 16:20:23,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:20:23,613 INFO L495 AbstractCegarLoop]: Abstraction has 1820 states and 2821 transitions. [2023-12-02 16:20:23,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:20:23,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 2821 transitions. [2023-12-02 16:20:23,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-02 16:20:23,616 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:20:23,616 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, 1, 1, 1, 1, 1, 1] [2023-12-02 16:20:23,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 16:20:23,617 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:20:23,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:20:23,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1931852475, now seen corresponding path program 1 times [2023-12-02 16:20:23,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:20:23,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485725820] [2023-12-02 16:20:23,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:20:23,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:20:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:20:23,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:20:23,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:20:23,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485725820] [2023-12-02 16:20:23,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485725820] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:20:23,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:20:23,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:20:23,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303860661] [2023-12-02 16:20:23,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:20:23,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:20:23,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:20:23,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:20:23,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:20:23,795 INFO L87 Difference]: Start difference. First operand 1820 states and 2821 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:20:24,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:20:24,684 INFO L93 Difference]: Finished difference Result 7203 states and 11497 transitions. [2023-12-02 16:20:24,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:20:24,686 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 77 [2023-12-02 16:20:24,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:20:24,729 INFO L225 Difference]: With dead ends: 7203 [2023-12-02 16:20:24,729 INFO L226 Difference]: Without dead ends: 5388 [2023-12-02 16:20:24,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:20:24,741 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 1257 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1262 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 16:20:24,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1262 Valid, 1309 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 16:20:24,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5388 states. [2023-12-02 16:20:25,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5388 to 5094. [2023-12-02 16:20:25,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5094 states, 4465 states have (on average 1.4868980963045912) internal successors, (6639), 4407 states have internal predecessors, (6639), 464 states have call successors, (464), 148 states have call predecessors, (464), 164 states have return successors, (958), 539 states have call predecessors, (958), 464 states have call successors, (958) [2023-12-02 16:20:25,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5094 states to 5094 states and 8061 transitions. [2023-12-02 16:20:25,063 INFO L78 Accepts]: Start accepts. Automaton has 5094 states and 8061 transitions. Word has length 77 [2023-12-02 16:20:25,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:20:25,064 INFO L495 AbstractCegarLoop]: Abstraction has 5094 states and 8061 transitions. [2023-12-02 16:20:25,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:20:25,064 INFO L276 IsEmpty]: Start isEmpty. Operand 5094 states and 8061 transitions. [2023-12-02 16:20:25,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-02 16:20:25,066 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:20:25,066 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, 1, 1, 1, 1, 1, 1] [2023-12-02 16:20:25,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 16:20:25,067 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:20:25,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:20:25,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1221467428, now seen corresponding path program 1 times [2023-12-02 16:20:25,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:20:25,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165375088] [2023-12-02 16:20:25,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:20:25,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:20:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:20:25,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:20:25,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:20:25,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165375088] [2023-12-02 16:20:25,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165375088] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:20:25,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:20:25,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:20:25,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231189896] [2023-12-02 16:20:25,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:20:25,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:20:25,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:20:25,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:20:25,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:20:25,196 INFO L87 Difference]: Start difference. First operand 5094 states and 8061 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:20:26,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:20:26,328 INFO L93 Difference]: Finished difference Result 18871 states and 30919 transitions. [2023-12-02 16:20:26,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:20:26,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 77 [2023-12-02 16:20:26,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:20:26,444 INFO L225 Difference]: With dead ends: 18871 [2023-12-02 16:20:26,444 INFO L226 Difference]: Without dead ends: 13782 [2023-12-02 16:20:26,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:20:26,473 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 1252 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1257 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 16:20:26,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1257 Valid, 1306 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 16:20:26,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13782 states. [2023-12-02 16:20:27,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13782 to 13114. [2023-12-02 16:20:27,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13114 states, 11663 states have (on average 1.4935265369116009) internal successors, (17419), 11383 states have internal predecessors, (17419), 1030 states have call successors, (1030), 348 states have call predecessors, (1030), 420 states have return successors, (2738), 1383 states have call predecessors, (2738), 1030 states have call successors, (2738) [2023-12-02 16:20:27,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13114 states to 13114 states and 21187 transitions. [2023-12-02 16:20:27,228 INFO L78 Accepts]: Start accepts. Automaton has 13114 states and 21187 transitions. Word has length 77 [2023-12-02 16:20:27,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:20:27,229 INFO L495 AbstractCegarLoop]: Abstraction has 13114 states and 21187 transitions. [2023-12-02 16:20:27,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:20:27,229 INFO L276 IsEmpty]: Start isEmpty. Operand 13114 states and 21187 transitions. [2023-12-02 16:20:27,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-02 16:20:27,231 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:20:27,231 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, 1, 1, 1, 1, 1, 1] [2023-12-02 16:20:27,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 16:20:27,232 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:20:27,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:20:27,232 INFO L85 PathProgramCache]: Analyzing trace with hash 519899203, now seen corresponding path program 1 times [2023-12-02 16:20:27,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:20:27,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395021152] [2023-12-02 16:20:27,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:20:27,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:20:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:20:27,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:20:27,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:20:27,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395021152] [2023-12-02 16:20:27,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395021152] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:20:27,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:20:27,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:20:27,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477411571] [2023-12-02 16:20:27,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:20:27,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:20:27,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:20:27,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:20:27,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:20:27,390 INFO L87 Difference]: Start difference. First operand 13114 states and 21187 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:20:28,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:20:28,954 INFO L93 Difference]: Finished difference Result 47799 states and 80557 transitions. [2023-12-02 16:20:28,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:20:28,955 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 77 [2023-12-02 16:20:28,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:20:29,156 INFO L225 Difference]: With dead ends: 47799 [2023-12-02 16:20:29,156 INFO L226 Difference]: Without dead ends: 34690 [2023-12-02 16:20:29,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:20:29,222 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 1247 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1254 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 16:20:29,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1254 Valid, 1304 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 16:20:29,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34690 states. [2023-12-02 16:20:30,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34690 to 33270. [2023-12-02 16:20:30,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33270 states, 29901 states have (on average 1.5006521521019365) internal successors, (44871), 28923 states have internal predecessors, (44871), 2292 states have call successors, (2292), 820 states have call predecessors, (2292), 1076 states have return successors, (7766), 3527 states have call predecessors, (7766), 2292 states have call successors, (7766) [2023-12-02 16:20:31,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33270 states to 33270 states and 54929 transitions. [2023-12-02 16:20:31,102 INFO L78 Accepts]: Start accepts. Automaton has 33270 states and 54929 transitions. Word has length 77 [2023-12-02 16:20:31,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:20:31,102 INFO L495 AbstractCegarLoop]: Abstraction has 33270 states and 54929 transitions. [2023-12-02 16:20:31,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:20:31,102 INFO L276 IsEmpty]: Start isEmpty. Operand 33270 states and 54929 transitions. [2023-12-02 16:20:31,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-02 16:20:31,105 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:20:31,105 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, 1, 1, 1, 1, 1, 1] [2023-12-02 16:20:31,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 16:20:31,106 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:20:31,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:20:31,107 INFO L85 PathProgramCache]: Analyzing trace with hash -788105566, now seen corresponding path program 1 times [2023-12-02 16:20:31,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:20:31,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205404604] [2023-12-02 16:20:31,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:20:31,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:20:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:20:31,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:20:31,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:20:31,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205404604] [2023-12-02 16:20:31,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205404604] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:20:31,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:20:31,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:20:31,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474209144] [2023-12-02 16:20:31,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:20:31,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:20:31,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:20:31,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:20:31,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:20:31,237 INFO L87 Difference]: Start difference. First operand 33270 states and 54929 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:20:33,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:20:33,934 INFO L93 Difference]: Finished difference Result 121279 states and 210379 transitions. [2023-12-02 16:20:33,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:20:33,935 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 77 [2023-12-02 16:20:33,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:20:34,395 INFO L225 Difference]: With dead ends: 121279 [2023-12-02 16:20:34,396 INFO L226 Difference]: Without dead ends: 88014 [2023-12-02 16:20:34,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:20:34,499 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 1242 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1249 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 16:20:34,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1249 Valid, 1301 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 16:20:34,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88014 states. [2023-12-02 16:20:38,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88014 to 85070. [2023-12-02 16:20:38,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85070 states, 77031 states have (on average 1.5086263971647778) internal successors, (116211), 73959 states have internal predecessors, (116211), 5218 states have call successors, (5218), 1980 states have call predecessors, (5218), 2820 states have return successors, (22146), 9131 states have call predecessors, (22146), 5218 states have call successors, (22146) [2023-12-02 16:20:38,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85070 states to 85070 states and 143575 transitions. [2023-12-02 16:20:38,423 INFO L78 Accepts]: Start accepts. Automaton has 85070 states and 143575 transitions. Word has length 77 [2023-12-02 16:20:38,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:20:38,423 INFO L495 AbstractCegarLoop]: Abstraction has 85070 states and 143575 transitions. [2023-12-02 16:20:38,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:20:38,424 INFO L276 IsEmpty]: Start isEmpty. Operand 85070 states and 143575 transitions. [2023-12-02 16:20:38,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-02 16:20:38,425 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:20:38,426 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, 1, 1, 1, 1, 1, 1] [2023-12-02 16:20:38,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 16:20:38,426 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:20:38,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:20:38,426 INFO L85 PathProgramCache]: Analyzing trace with hash -388114367, now seen corresponding path program 1 times [2023-12-02 16:20:38,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:20:38,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313050637] [2023-12-02 16:20:38,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:20:38,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:20:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:20:38,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:20:38,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:20:38,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313050637] [2023-12-02 16:20:38,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313050637] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:20:38,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:20:38,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:20:38,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489537363] [2023-12-02 16:20:38,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:20:38,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:20:38,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:20:38,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:20:38,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:20:38,519 INFO L87 Difference]: Start difference. First operand 85070 states and 143575 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:20:45,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:20:45,109 INFO L93 Difference]: Finished difference Result 311543 states and 555929 transitions. [2023-12-02 16:20:45,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:20:45,110 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 77 [2023-12-02 16:20:45,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:20:46,264 INFO L225 Difference]: With dead ends: 311543 [2023-12-02 16:20:46,264 INFO L226 Difference]: Without dead ends: 226478 [2023-12-02 16:20:46,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:20:46,394 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 1238 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1248 SdHoareTripleChecker+Valid, 1297 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 16:20:46,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1248 Valid, 1297 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 16:20:46,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226478 states. [2023-12-02 16:20:56,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226478 to 220410. [2023-12-02 16:20:56,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220410 states, 200501 states have (on average 1.5175136283609558) internal successors, (304263), 191355 states have internal predecessors, (304263), 12304 states have call successors, (12304), 4948 states have call predecessors, (12304), 7604 states have return successors, (63606), 24107 states have call predecessors, (63606), 12304 states have call successors, (63606) [2023-12-02 16:20:57,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220410 states to 220410 states and 380173 transitions. [2023-12-02 16:20:57,507 INFO L78 Accepts]: Start accepts. Automaton has 220410 states and 380173 transitions. Word has length 77 [2023-12-02 16:20:57,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:20:57,508 INFO L495 AbstractCegarLoop]: Abstraction has 220410 states and 380173 transitions. [2023-12-02 16:20:57,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:20:57,508 INFO L276 IsEmpty]: Start isEmpty. Operand 220410 states and 380173 transitions. [2023-12-02 16:20:57,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-02 16:20:57,510 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:20:57,510 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, 1, 1, 1, 1, 1, 1] [2023-12-02 16:20:57,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 16:20:57,510 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:20:57,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:20:57,511 INFO L85 PathProgramCache]: Analyzing trace with hash -2016764640, now seen corresponding path program 1 times [2023-12-02 16:20:57,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:20:57,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106894610] [2023-12-02 16:20:57,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:20:57,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:20:57,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:20:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:20:57,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:20:57,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106894610] [2023-12-02 16:20:57,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106894610] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:20:57,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:20:57,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:20:57,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986365139] [2023-12-02 16:20:57,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:20:57,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:20:57,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:20:57,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:20:57,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:20:57,874 INFO L87 Difference]: Start difference. First operand 220410 states and 380173 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:21:14,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:21:14,545 INFO L93 Difference]: Finished difference Result 820265 states and 1508038 transitions. [2023-12-02 16:21:14,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:21:14,545 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 77 [2023-12-02 16:21:14,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:21:18,201 INFO L225 Difference]: With dead ends: 820265 [2023-12-02 16:21:18,202 INFO L226 Difference]: Without dead ends: 599860 [2023-12-02 16:21:18,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:21:18,592 INFO L413 NwaCegarLoop]: 614 mSDtfsCounter, 1237 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1246 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:21:18,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1246 Valid, 1295 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 16:21:19,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599860 states. [2023-12-02 16:21:46,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599860 to 584250. [2023-12-02 16:21:46,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584250 states, 532693 states have (on average 1.5213659650117421) internal successors, (810421), 503469 states have internal predecessors, (810421), 30496 states have call successors, (30496), 12828 states have call predecessors, (30496), 21060 states have return successors, (188510), 67953 states have call predecessors, (188510), 30496 states have call successors, (188510) [2023-12-02 16:21:49,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584250 states to 584250 states and 1029427 transitions. [2023-12-02 16:21:49,271 INFO L78 Accepts]: Start accepts. Automaton has 584250 states and 1029427 transitions. Word has length 77 [2023-12-02 16:21:49,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:21:49,272 INFO L495 AbstractCegarLoop]: Abstraction has 584250 states and 1029427 transitions. [2023-12-02 16:21:49,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:21:49,272 INFO L276 IsEmpty]: Start isEmpty. Operand 584250 states and 1029427 transitions. [2023-12-02 16:21:49,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-02 16:21:49,276 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:21:49,276 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:21:49,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 16:21:49,276 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:21:49,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:21:49,277 INFO L85 PathProgramCache]: Analyzing trace with hash -2131367927, now seen corresponding path program 1 times [2023-12-02 16:21:49,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:21:49,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971750711] [2023-12-02 16:21:49,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:21:49,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:21:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:21:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:21:49,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:21:49,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971750711] [2023-12-02 16:21:49,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971750711] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:21:49,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:21:49,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 16:21:49,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305587058] [2023-12-02 16:21:49,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:21:49,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:21:49,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:21:49,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:21:49,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:21:49,539 INFO L87 Difference]: Start difference. First operand 584250 states and 1029427 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 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) [2023-12-02 16:22:17,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:22:17,706 INFO L93 Difference]: Finished difference Result 1551539 states and 2769838 transitions. [2023-12-02 16:22:17,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 16:22:17,707 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 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 81 [2023-12-02 16:22:17,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:22:21,987 INFO L225 Difference]: With dead ends: 1551539 [2023-12-02 16:22:21,988 INFO L226 Difference]: Without dead ends: 967295 [2023-12-02 16:22:22,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 16:22:22,702 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 893 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:22:22,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [900 Valid, 831 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:22:23,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967295 states.