./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.13.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5b1a8c9-12a8-4015-8619-326b1738d5cb/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5b1a8c9-12a8-4015-8619-326b1738d5cb/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_d5b1a8c9-12a8-4015-8619-326b1738d5cb/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5b1a8c9-12a8-4015-8619-326b1738d5cb/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.13.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5b1a8c9-12a8-4015-8619-326b1738d5cb/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_d5b1a8c9-12a8-4015-8619-326b1738d5cb/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 5975f0f3825b3a6653676f33bd69d14e1e58fcf0306bfb5508ab91dc8951d6c4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:52:18,176 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:52:18,243 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5b1a8c9-12a8-4015-8619-326b1738d5cb/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 14:52:18,248 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:52:18,248 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:52:18,272 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:52:18,273 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:52:18,274 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:52:18,274 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:52:18,275 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:52:18,276 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:52:18,276 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:52:18,277 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:52:18,277 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 14:52:18,278 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:52:18,278 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:52:18,279 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 14:52:18,279 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 14:52:18,279 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:52:18,280 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 14:52:18,280 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 14:52:18,283 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 14:52:18,284 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:52:18,284 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 14:52:18,284 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 14:52:18,285 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 14:52:18,285 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 14:52:18,286 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:52:18,286 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 14:52:18,286 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:52:18,287 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 14:52:18,287 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 14:52:18,287 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 14:52:18,288 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:52:18,288 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:52:18,288 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:52:18,288 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:52:18,288 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:52:18,289 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:52:18,289 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:52:18,289 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 14:52:18,290 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 14:52:18,290 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 14:52:18,290 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:52:18,290 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 14:52:18,290 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:52:18,291 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:52:18,291 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_d5b1a8c9-12a8-4015-8619-326b1738d5cb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5b1a8c9-12a8-4015-8619-326b1738d5cb/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5975f0f3825b3a6653676f33bd69d14e1e58fcf0306bfb5508ab91dc8951d6c4 [2023-12-02 14:52:18,519 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:52:18,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:52:18,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:52:18,543 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:52:18,544 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:52:18,545 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5b1a8c9-12a8-4015-8619-326b1738d5cb/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/systemc/transmitter.13.cil.c [2023-12-02 14:52:21,242 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:52:21,465 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:52:21,466 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5b1a8c9-12a8-4015-8619-326b1738d5cb/sv-benchmarks/c/systemc/transmitter.13.cil.c [2023-12-02 14:52:21,482 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5b1a8c9-12a8-4015-8619-326b1738d5cb/bin/utaipan-verify-nQ1chXbOIh/data/a946785dc/90dddd57444048308f9de7f20edbd87d/FLAG6645e7830 [2023-12-02 14:52:21,496 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5b1a8c9-12a8-4015-8619-326b1738d5cb/bin/utaipan-verify-nQ1chXbOIh/data/a946785dc/90dddd57444048308f9de7f20edbd87d [2023-12-02 14:52:21,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:52:21,500 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:52:21,502 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:52:21,502 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:52:21,507 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:52:21,508 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:52:21" (1/1) ... [2023-12-02 14:52:21,509 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65049b54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:52:21, skipping insertion in model container [2023-12-02 14:52:21,509 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:52:21" (1/1) ... [2023-12-02 14:52:21,567 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:52:21,716 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_d5b1a8c9-12a8-4015-8619-326b1738d5cb/sv-benchmarks/c/systemc/transmitter.13.cil.c[706,719] [2023-12-02 14:52:21,849 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:52:21,863 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 14:52:21,875 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_d5b1a8c9-12a8-4015-8619-326b1738d5cb/sv-benchmarks/c/systemc/transmitter.13.cil.c[706,719] [2023-12-02 14:52:21,933 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:52:21,956 INFO L206 MainTranslator]: Completed translation [2023-12-02 14:52:21,957 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:52:21 WrapperNode [2023-12-02 14:52:21,957 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:52:21,958 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 14:52:21,958 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 14:52:21,958 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 14:52:21,966 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:52:21" (1/1) ... [2023-12-02 14:52:21,979 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:52:21" (1/1) ... [2023-12-02 14:52:22,019 INFO L138 Inliner]: procedures = 54, calls = 69, calls flagged for inlining = 38, calls inlined = 38, statements flattened = 918 [2023-12-02 14:52:22,020 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 14:52:22,020 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 14:52:22,020 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 14:52:22,020 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 14:52:22,027 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:52:21" (1/1) ... [2023-12-02 14:52:22,027 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:52:21" (1/1) ... [2023-12-02 14:52:22,031 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:52:21" (1/1) ... [2023-12-02 14:52:22,031 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:52:21" (1/1) ... [2023-12-02 14:52:22,044 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:52:21" (1/1) ... [2023-12-02 14:52:22,058 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:52:21" (1/1) ... [2023-12-02 14:52:22,062 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:52:21" (1/1) ... [2023-12-02 14:52:22,066 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:52:21" (1/1) ... [2023-12-02 14:52:22,072 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 14:52:22,073 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 14:52:22,073 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 14:52:22,073 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 14:52:22,074 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:52:21" (1/1) ... [2023-12-02 14:52:22,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:52:22,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5b1a8c9-12a8-4015-8619-326b1738d5cb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:52:22,104 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5b1a8c9-12a8-4015-8619-326b1738d5cb/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 14:52:22,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5b1a8c9-12a8-4015-8619-326b1738d5cb/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 14:52:22,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 14:52:22,142 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-12-02 14:52:22,143 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-12-02 14:52:22,143 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 14:52:22,143 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 14:52:22,143 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-12-02 14:52:22,143 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-12-02 14:52:22,143 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-12-02 14:52:22,143 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-12-02 14:52:22,144 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-12-02 14:52:22,144 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-12-02 14:52:22,144 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-12-02 14:52:22,144 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-12-02 14:52:22,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 14:52:22,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 14:52:22,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 14:52:22,279 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 14:52:22,281 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 14:52:22,981 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 14:52:23,513 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 14:52:23,513 INFO L309 CfgBuilder]: Removed 17 assume(true) statements. [2023-12-02 14:52:23,515 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:52:23 BoogieIcfgContainer [2023-12-02 14:52:23,515 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 14:52:23,518 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 14:52:23,518 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 14:52:23,521 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 14:52:23,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:52:21" (1/3) ... [2023-12-02 14:52:23,522 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@260886b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:52:23, skipping insertion in model container [2023-12-02 14:52:23,522 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:52:21" (2/3) ... [2023-12-02 14:52:23,522 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@260886b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:52:23, skipping insertion in model container [2023-12-02 14:52:23,523 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:52:23" (3/3) ... [2023-12-02 14:52:23,524 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.13.cil.c [2023-12-02 14:52:23,542 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 14:52:23,543 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 14:52:23,597 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:52:23,604 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;@36a378a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:52:23,604 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 14:52:23,609 INFO L276 IsEmpty]: Start isEmpty. Operand has 211 states, 177 states have (on average 1.5197740112994351) internal successors, (269), 179 states have internal predecessors, (269), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-12-02 14:52:23,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-02 14:52:23,621 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:52:23,622 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 14:52:23,623 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:52:23,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:52:23,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1257720567, now seen corresponding path program 1 times [2023-12-02 14:52:23,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:52:23,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283525386] [2023-12-02 14:52:23,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:52:23,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:52:23,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:52:24,084 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 14:52:24,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:52:24,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283525386] [2023-12-02 14:52:24,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283525386] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:52:24,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:52:24,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 14:52:24,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274337350] [2023-12-02 14:52:24,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:52:24,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:52:24,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:52:24,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:52:24,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:52:24,124 INFO L87 Difference]: Start difference. First operand has 211 states, 177 states have (on average 1.5197740112994351) internal successors, (269), 179 states have internal predecessors, (269), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 14:52:24,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:52:24,691 INFO L93 Difference]: Finished difference Result 616 states and 967 transitions. [2023-12-02 14:52:24,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 14:52:24,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 81 [2023-12-02 14:52:24,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:52:24,708 INFO L225 Difference]: With dead ends: 616 [2023-12-02 14:52:24,709 INFO L226 Difference]: Without dead ends: 406 [2023-12-02 14:52:24,715 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 14:52:24,719 INFO L413 NwaCegarLoop]: 502 mSDtfsCounter, 560 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 14:52:24,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 910 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 14:52:24,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2023-12-02 14:52:24,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 403. [2023-12-02 14:52:24,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 343 states have (on average 1.4810495626822158) internal successors, (508), 344 states have internal predecessors, (508), 47 states have call successors, (47), 12 states have call predecessors, (47), 12 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2023-12-02 14:52:24,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 602 transitions. [2023-12-02 14:52:24,805 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 602 transitions. Word has length 81 [2023-12-02 14:52:24,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:52:24,805 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 602 transitions. [2023-12-02 14:52:24,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 14:52:24,806 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 602 transitions. [2023-12-02 14:52:24,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-02 14:52:24,810 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:52:24,811 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 14:52:24,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 14:52:24,811 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:52:24,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:52:24,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1081925514, now seen corresponding path program 1 times [2023-12-02 14:52:24,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:52:24,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478100045] [2023-12-02 14:52:24,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:52:24,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:52:24,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:52:25,026 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 14:52:25,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:52:25,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478100045] [2023-12-02 14:52:25,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478100045] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:52:25,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:52:25,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 14:52:25,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230684937] [2023-12-02 14:52:25,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:52:25,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 14:52:25,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:52:25,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 14:52:25,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:52:25,030 INFO L87 Difference]: Start difference. First operand 403 states and 602 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 14:52:25,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:52:25,896 INFO L93 Difference]: Finished difference Result 1385 states and 2093 transitions. [2023-12-02 14:52:25,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 14:52:25,897 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 81 [2023-12-02 14:52:25,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:52:25,904 INFO L225 Difference]: With dead ends: 1385 [2023-12-02 14:52:25,905 INFO L226 Difference]: Without dead ends: 960 [2023-12-02 14:52:25,907 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 14:52:25,909 INFO L413 NwaCegarLoop]: 494 mSDtfsCounter, 1206 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 1383 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 14:52:25,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1220 Valid, 1383 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 14:52:25,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2023-12-02 14:52:25,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 948. [2023-12-02 14:52:25,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 827 states have (on average 1.4703748488512696) internal successors, (1216), 816 states have internal predecessors, (1216), 92 states have call successors, (92), 26 states have call predecessors, (92), 28 states have return successors, (106), 106 states have call predecessors, (106), 92 states have call successors, (106) [2023-12-02 14:52:25,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1414 transitions. [2023-12-02 14:52:25,977 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1414 transitions. Word has length 81 [2023-12-02 14:52:25,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:52:25,977 INFO L495 AbstractCegarLoop]: Abstraction has 948 states and 1414 transitions. [2023-12-02 14:52:25,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 14:52:25,978 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1414 transitions. [2023-12-02 14:52:25,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-02 14:52:25,980 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:52:25,980 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 14:52:25,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 14:52:25,981 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:52:25,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:52:25,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1459568331, now seen corresponding path program 1 times [2023-12-02 14:52:25,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:52:25,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332623140] [2023-12-02 14:52:25,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:52:25,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:52:26,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:52:26,182 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 14:52:26,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:52:26,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332623140] [2023-12-02 14:52:26,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332623140] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:52:26,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:52:26,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 14:52:26,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126306636] [2023-12-02 14:52:26,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:52:26,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 14:52:26,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:52:26,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 14:52:26,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:52:26,186 INFO L87 Difference]: Start difference. First operand 948 states and 1414 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 14:52:26,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:52:26,927 INFO L93 Difference]: Finished difference Result 3341 states and 5048 transitions. [2023-12-02 14:52:26,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 14:52:26,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 81 [2023-12-02 14:52:26,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:52:26,947 INFO L225 Difference]: With dead ends: 3341 [2023-12-02 14:52:26,947 INFO L226 Difference]: Without dead ends: 2347 [2023-12-02 14:52:26,953 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 14:52:26,954 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 1206 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 14:52:26,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1220 Valid, 1092 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 14:52:26,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2023-12-02 14:52:27,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 1807. [2023-12-02 14:52:27,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1578 states have (on average 1.474017743979721) internal successors, (2326), 1568 states have internal predecessors, (2326), 172 states have call successors, (172), 50 states have call predecessors, (172), 56 states have return successors, (213), 189 states have call predecessors, (213), 172 states have call successors, (213) [2023-12-02 14:52:27,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 2711 transitions. [2023-12-02 14:52:27,089 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 2711 transitions. Word has length 81 [2023-12-02 14:52:27,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:52:27,089 INFO L495 AbstractCegarLoop]: Abstraction has 1807 states and 2711 transitions. [2023-12-02 14:52:27,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 14:52:27,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 2711 transitions. [2023-12-02 14:52:27,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-02 14:52:27,092 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:52:27,092 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 14:52:27,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 14:52:27,093 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:52:27,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:52:27,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1015673046, now seen corresponding path program 1 times [2023-12-02 14:52:27,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:52:27,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119742436] [2023-12-02 14:52:27,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:52:27,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:52:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:52:27,223 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 14:52:27,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:52:27,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119742436] [2023-12-02 14:52:27,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119742436] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:52:27,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:52:27,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 14:52:27,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117382478] [2023-12-02 14:52:27,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:52:27,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:52:27,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:52:27,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:52:27,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:52:27,227 INFO L87 Difference]: Start difference. First operand 1807 states and 2711 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 14:52:27,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:52:27,775 INFO L93 Difference]: Finished difference Result 5382 states and 8212 transitions. [2023-12-02 14:52:27,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 14:52:27,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 81 [2023-12-02 14:52:27,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:52:27,805 INFO L225 Difference]: With dead ends: 5382 [2023-12-02 14:52:27,805 INFO L226 Difference]: Without dead ends: 3580 [2023-12-02 14:52:27,815 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 14:52:27,816 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 575 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:52:27,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 908 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:52:27,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3580 states. [2023-12-02 14:52:28,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3580 to 3568. [2023-12-02 14:52:28,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3568 states, 3123 states have (on average 1.4665385846942043) internal successors, (4580), 3103 states have internal predecessors, (4580), 332 states have call successors, (332), 100 states have call predecessors, (332), 112 states have return successors, (411), 365 states have call predecessors, (411), 332 states have call successors, (411) [2023-12-02 14:52:28,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3568 states to 3568 states and 5323 transitions. [2023-12-02 14:52:28,039 INFO L78 Accepts]: Start accepts. Automaton has 3568 states and 5323 transitions. Word has length 81 [2023-12-02 14:52:28,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:52:28,039 INFO L495 AbstractCegarLoop]: Abstraction has 3568 states and 5323 transitions. [2023-12-02 14:52:28,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 14:52:28,039 INFO L276 IsEmpty]: Start isEmpty. Operand 3568 states and 5323 transitions. [2023-12-02 14:52:28,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-02 14:52:28,041 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:52:28,042 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 14:52:28,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 14:52:28,042 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:52:28,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:52:28,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1007922487, now seen corresponding path program 1 times [2023-12-02 14:52:28,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:52:28,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107583903] [2023-12-02 14:52:28,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:52:28,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:52:28,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:52:28,197 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 14:52:28,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:52:28,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107583903] [2023-12-02 14:52:28,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107583903] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:52:28,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:52:28,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 14:52:28,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813671371] [2023-12-02 14:52:28,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:52:28,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 14:52:28,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:52:28,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 14:52:28,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:52:28,200 INFO L87 Difference]: Start difference. First operand 3568 states and 5323 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 14:52:29,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:52:29,162 INFO L93 Difference]: Finished difference Result 12330 states and 18698 transitions. [2023-12-02 14:52:29,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 14:52:29,163 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 81 [2023-12-02 14:52:29,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:52:29,221 INFO L225 Difference]: With dead ends: 12330 [2023-12-02 14:52:29,221 INFO L226 Difference]: Without dead ends: 8575 [2023-12-02 14:52:29,239 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 14:52:29,240 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 1206 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 14:52:29,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1220 Valid, 1092 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 14:52:29,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8575 states. [2023-12-02 14:52:29,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8575 to 6901. [2023-12-02 14:52:29,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6901 states, 6040 states have (on average 1.4667218543046359) internal successors, (8859), 6028 states have internal predecessors, (8859), 636 states have call successors, (636), 196 states have call predecessors, (636), 224 states have return successors, (815), 677 states have call predecessors, (815), 636 states have call successors, (815) [2023-12-02 14:52:29,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6901 states to 6901 states and 10310 transitions. [2023-12-02 14:52:29,657 INFO L78 Accepts]: Start accepts. Automaton has 6901 states and 10310 transitions. Word has length 81 [2023-12-02 14:52:29,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:52:29,658 INFO L495 AbstractCegarLoop]: Abstraction has 6901 states and 10310 transitions. [2023-12-02 14:52:29,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 14:52:29,658 INFO L276 IsEmpty]: Start isEmpty. Operand 6901 states and 10310 transitions. [2023-12-02 14:52:29,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-02 14:52:29,660 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:52:29,660 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 14:52:29,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 14:52:29,661 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:52:29,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:52:29,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1556707752, now seen corresponding path program 1 times [2023-12-02 14:52:29,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:52:29,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531822224] [2023-12-02 14:52:29,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:52:29,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:52:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:52:29,762 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 14:52:29,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:52:29,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531822224] [2023-12-02 14:52:29,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531822224] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:52:29,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:52:29,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 14:52:29,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133155611] [2023-12-02 14:52:29,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:52:29,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:52:29,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:52:29,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:52:29,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:52:29,764 INFO L87 Difference]: Start difference. First operand 6901 states and 10310 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 14:52:30,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:52:30,499 INFO L93 Difference]: Finished difference Result 20580 states and 31274 transitions. [2023-12-02 14:52:30,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 14:52:30,501 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 81 [2023-12-02 14:52:30,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:52:30,573 INFO L225 Difference]: With dead ends: 20580 [2023-12-02 14:52:30,573 INFO L226 Difference]: Without dead ends: 13684 [2023-12-02 14:52:30,592 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 14:52:30,593 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 587 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:52:30,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 908 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:52:30,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13684 states. [2023-12-02 14:52:31,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13684 to 13646. [2023-12-02 14:52:31,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13646 states, 11961 states have (on average 1.4581556726026252) internal successors, (17441), 11938 states have internal predecessors, (17441), 1236 states have call successors, (1236), 392 states have call predecessors, (1236), 448 states have return successors, (1580), 1316 states have call predecessors, (1580), 1236 states have call successors, (1580) [2023-12-02 14:52:31,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13646 states to 13646 states and 20257 transitions. [2023-12-02 14:52:31,394 INFO L78 Accepts]: Start accepts. Automaton has 13646 states and 20257 transitions. Word has length 81 [2023-12-02 14:52:31,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:52:31,394 INFO L495 AbstractCegarLoop]: Abstraction has 13646 states and 20257 transitions. [2023-12-02 14:52:31,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 14:52:31,395 INFO L276 IsEmpty]: Start isEmpty. Operand 13646 states and 20257 transitions. [2023-12-02 14:52:31,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-02 14:52:31,397 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:52:31,397 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 14:52:31,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 14:52:31,397 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:52:31,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:52:31,398 INFO L85 PathProgramCache]: Analyzing trace with hash 281605063, now seen corresponding path program 1 times [2023-12-02 14:52:31,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:52:31,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729172057] [2023-12-02 14:52:31,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:52:31,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:52:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:52:31,578 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 14:52:31,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:52:31,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729172057] [2023-12-02 14:52:31,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729172057] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:52:31,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:52:31,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 14:52:31,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117183762] [2023-12-02 14:52:31,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:52:31,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 14:52:31,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:52:31,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 14:52:31,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:52:31,581 INFO L87 Difference]: Start difference. First operand 13646 states and 20257 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 14:52:33,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:52:33,174 INFO L93 Difference]: Finished difference Result 46071 states and 69632 transitions. [2023-12-02 14:52:33,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 14:52:33,174 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 81 [2023-12-02 14:52:33,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:52:33,279 INFO L225 Difference]: With dead ends: 46071 [2023-12-02 14:52:33,279 INFO L226 Difference]: Without dead ends: 31702 [2023-12-02 14:52:33,373 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 14:52:33,375 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 1206 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 14:52:33,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1220 Valid, 1092 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 14:52:33,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31702 states. [2023-12-02 14:52:34,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31702 to 26644. [2023-12-02 14:52:34,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26644 states, 23359 states have (on average 1.4563551521897342) internal successors, (34019), 23368 states have internal predecessors, (34019), 2388 states have call successors, (2388), 776 states have call predecessors, (2388), 896 states have return successors, (3100), 2500 states have call predecessors, (3100), 2388 states have call successors, (3100) [2023-12-02 14:52:34,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26644 states to 26644 states and 39507 transitions. [2023-12-02 14:52:34,772 INFO L78 Accepts]: Start accepts. Automaton has 26644 states and 39507 transitions. Word has length 81 [2023-12-02 14:52:34,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:52:34,772 INFO L495 AbstractCegarLoop]: Abstraction has 26644 states and 39507 transitions. [2023-12-02 14:52:34,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 14:52:34,773 INFO L276 IsEmpty]: Start isEmpty. Operand 26644 states and 39507 transitions. [2023-12-02 14:52:34,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-02 14:52:34,774 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:52:34,775 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 14:52:34,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 14:52:34,775 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:52:34,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:52:34,775 INFO L85 PathProgramCache]: Analyzing trace with hash 804925734, now seen corresponding path program 1 times [2023-12-02 14:52:34,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:52:34,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172162121] [2023-12-02 14:52:34,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:52:34,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:52:34,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:52:34,871 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 14:52:34,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:52:34,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172162121] [2023-12-02 14:52:34,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172162121] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:52:34,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:52:34,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 14:52:34,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61855812] [2023-12-02 14:52:34,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:52:34,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 14:52:34,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:52:34,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 14:52:34,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:52:34,873 INFO L87 Difference]: Start difference. First operand 26644 states and 39507 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 14:52:37,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:52:37,233 INFO L93 Difference]: Finished difference Result 89225 states and 134782 transitions. [2023-12-02 14:52:37,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 14:52:37,233 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 81 [2023-12-02 14:52:37,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:52:37,376 INFO L225 Difference]: With dead ends: 89225 [2023-12-02 14:52:37,377 INFO L226 Difference]: Without dead ends: 61170 [2023-12-02 14:52:37,421 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 14:52:37,421 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 1206 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 14:52:37,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1220 Valid, 1092 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 14:52:37,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61170 states. [2023-12-02 14:52:39,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61170 to 52368. [2023-12-02 14:52:39,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52368 states, 45947 states have (on average 1.4538272357281214) internal successors, (66799), 46020 states have internal predecessors, (66799), 4628 states have call successors, (4628), 1544 states have call predecessors, (4628), 1792 states have return successors, (6044), 4804 states have call predecessors, (6044), 4628 states have call successors, (6044) [2023-12-02 14:52:39,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52368 states to 52368 states and 77471 transitions. [2023-12-02 14:52:39,403 INFO L78 Accepts]: Start accepts. Automaton has 52368 states and 77471 transitions. Word has length 81 [2023-12-02 14:52:39,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:52:39,403 INFO L495 AbstractCegarLoop]: Abstraction has 52368 states and 77471 transitions. [2023-12-02 14:52:39,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 14:52:39,403 INFO L276 IsEmpty]: Start isEmpty. Operand 52368 states and 77471 transitions. [2023-12-02 14:52:39,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-02 14:52:39,405 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:52:39,405 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 14:52:39,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 14:52:39,406 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:52:39,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:52:39,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1856374823, now seen corresponding path program 1 times [2023-12-02 14:52:39,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:52:39,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921327015] [2023-12-02 14:52:39,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:52:39,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:52:39,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:52:39,671 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 14:52:39,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:52:39,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921327015] [2023-12-02 14:52:39,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921327015] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:52:39,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:52:39,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 14:52:39,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854106778] [2023-12-02 14:52:39,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:52:39,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:52:39,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:52:39,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:52:39,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:52:39,674 INFO L87 Difference]: Start difference. First operand 52368 states and 77471 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 14:52:43,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:52:43,043 INFO L93 Difference]: Finished difference Result 152548 states and 226733 transitions. [2023-12-02 14:52:43,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 14:52:43,044 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 14:52:43,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:52:43,315 INFO L225 Difference]: With dead ends: 152548 [2023-12-02 14:52:43,315 INFO L226 Difference]: Without dead ends: 100186 [2023-12-02 14:52:43,399 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 14:52:43,400 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 944 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:52:43,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [951 Valid, 764 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:52:43,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100186 states. [2023-12-02 14:52:47,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100186 to 88136. [2023-12-02 14:52:47,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88136 states, 78051 states have (on average 1.4448885984804807) internal successors, (112775), 78196 states have internal predecessors, (112775), 7012 states have call successors, (7012), 2576 states have call predecessors, (7012), 3072 states have return successors, (9844), 7364 states have call predecessors, (9844), 7012 states have call successors, (9844) [2023-12-02 14:52:47,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88136 states to 88136 states and 129631 transitions. [2023-12-02 14:52:47,486 INFO L78 Accepts]: Start accepts. Automaton has 88136 states and 129631 transitions. Word has length 81 [2023-12-02 14:52:47,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:52:47,486 INFO L495 AbstractCegarLoop]: Abstraction has 88136 states and 129631 transitions. [2023-12-02 14:52:47,487 INFO L496 AbstractCegarLoop]: INTERPOLANT 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) [2023-12-02 14:52:47,487 INFO L276 IsEmpty]: Start isEmpty. Operand 88136 states and 129631 transitions. [2023-12-02 14:52:47,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-02 14:52:47,489 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:52:47,489 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, 1, 1] [2023-12-02 14:52:47,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 14:52:47,489 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:52:47,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:52:47,490 INFO L85 PathProgramCache]: Analyzing trace with hash -929813959, now seen corresponding path program 1 times [2023-12-02 14:52:47,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:52:47,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996089586] [2023-12-02 14:52:47,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:52:47,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:52:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:52:47,706 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 14:52:47,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:52:47,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996089586] [2023-12-02 14:52:47,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996089586] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:52:47,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:52:47,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 14:52:47,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407680351] [2023-12-02 14:52:47,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:52:47,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:52:47,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:52:47,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:52:47,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:52:47,708 INFO L87 Difference]: Start difference. First operand 88136 states and 129631 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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 14:52:53,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:52:53,429 INFO L93 Difference]: Finished difference Result 297796 states and 440193 transitions. [2023-12-02 14:52:53,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 14:52:53,430 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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 83 [2023-12-02 14:52:53,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:52:54,119 INFO L225 Difference]: With dead ends: 297796 [2023-12-02 14:52:54,120 INFO L226 Difference]: Without dead ends: 209666 [2023-12-02 14:52:54,218 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 14:52:54,219 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 939 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 960 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:52:54,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [960 Valid, 763 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:52:54,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209666 states. [2023-12-02 14:53:01,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209666 to 173920. [2023-12-02 14:53:01,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173920 states, 154139 states have (on average 1.4404336345765836) internal successors, (222027), 154436 states have internal predecessors, (222027), 13636 states have call successors, (13636), 5152 states have call predecessors, (13636), 6144 states have return successors, (19052), 14332 states have call predecessors, (19052), 13636 states have call successors, (19052) [2023-12-02 14:53:01,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173920 states to 173920 states and 254715 transitions. [2023-12-02 14:53:01,893 INFO L78 Accepts]: Start accepts. Automaton has 173920 states and 254715 transitions. Word has length 83 [2023-12-02 14:53:01,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:53:01,894 INFO L495 AbstractCegarLoop]: Abstraction has 173920 states and 254715 transitions. [2023-12-02 14:53:01,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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 14:53:01,894 INFO L276 IsEmpty]: Start isEmpty. Operand 173920 states and 254715 transitions. [2023-12-02 14:53:01,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-02 14:53:01,897 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:53:01,897 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, 1, 1, 1, 1] [2023-12-02 14:53:01,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 14:53:01,897 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:53:01,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:53:01,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1279384556, now seen corresponding path program 1 times [2023-12-02 14:53:01,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:53:01,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115998605] [2023-12-02 14:53:01,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:53:01,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:53:02,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:53:02,438 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 14:53:02,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:53:02,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115998605] [2023-12-02 14:53:02,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115998605] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:53:02,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:53:02,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 14:53:02,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187623604] [2023-12-02 14:53:02,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:53:02,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:53:02,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:53:02,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:53:02,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:53:02,441 INFO L87 Difference]: Start difference. First operand 173920 states and 254715 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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 14:53:11,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:53:11,735 INFO L93 Difference]: Finished difference Result 464004 states and 682325 transitions. [2023-12-02 14:53:11,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 14:53:11,736 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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 85 [2023-12-02 14:53:11,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:53:12,536 INFO L225 Difference]: With dead ends: 464004 [2023-12-02 14:53:12,536 INFO L226 Difference]: Without dead ends: 290090 [2023-12-02 14:53:12,715 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 14:53:12,715 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 869 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:53:12,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [875 Valid, 805 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:53:12,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290090 states. [2023-12-02 14:53:23,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290090 to 258024. [2023-12-02 14:53:23,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258024 states, 228515 states have (on average 1.4365577752007528) internal successors, (328275), 228868 states have internal predecessors, (328275), 20292 states have call successors, (20292), 7744 states have call predecessors, (20292), 9216 states have return successors, (28196), 21412 states have call predecessors, (28196), 20292 states have call successors, (28196) [2023-12-02 14:53:24,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258024 states to 258024 states and 376763 transitions. [2023-12-02 14:53:24,298 INFO L78 Accepts]: Start accepts. Automaton has 258024 states and 376763 transitions. Word has length 85 [2023-12-02 14:53:24,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:53:24,298 INFO L495 AbstractCegarLoop]: Abstraction has 258024 states and 376763 transitions. [2023-12-02 14:53:24,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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 14:53:24,298 INFO L276 IsEmpty]: Start isEmpty. Operand 258024 states and 376763 transitions. [2023-12-02 14:53:24,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-02 14:53:24,301 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:53:24,301 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, 1, 1, 1, 1, 1, 1] [2023-12-02 14:53:24,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 14:53:24,301 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:53:24,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:53:24,301 INFO L85 PathProgramCache]: Analyzing trace with hash 501603065, now seen corresponding path program 1 times [2023-12-02 14:53:24,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:53:24,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811832788] [2023-12-02 14:53:24,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:53:24,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:53:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:53:24,491 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 14:53:24,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:53:24,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811832788] [2023-12-02 14:53:24,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811832788] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:53:24,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:53:24,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 14:53:24,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860194705] [2023-12-02 14:53:24,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:53:24,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:53:24,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:53:24,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:53:24,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:53:24,493 INFO L87 Difference]: Start difference. First operand 258024 states and 376763 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 14:53:39,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:53:39,994 INFO L93 Difference]: Finished difference Result 684716 states and 1004125 transitions. [2023-12-02 14:53:39,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 14:53:39,995 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 87 [2023-12-02 14:53:39,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:53:41,376 INFO L225 Difference]: With dead ends: 684716 [2023-12-02 14:53:41,376 INFO L226 Difference]: Without dead ends: 426698 [2023-12-02 14:53:41,735 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 14:53:41,736 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 867 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 929 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 14:53:41,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 929 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 14:53:42,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426698 states. [2023-12-02 14:53:57,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426698 to 383048. [2023-12-02 14:53:57,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383048 states, 339011 states have (on average 1.4325995321685727) internal successors, (485667), 339364 states have internal predecessors, (485667), 30212 states have call successors, (30212), 11648 states have call predecessors, (30212), 13824 states have return successors, (41700), 32036 states have call predecessors, (41700), 30212 states have call successors, (41700) [2023-12-02 14:53:59,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383048 states to 383048 states and 557579 transitions. [2023-12-02 14:53:59,325 INFO L78 Accepts]: Start accepts. Automaton has 383048 states and 557579 transitions. Word has length 87 [2023-12-02 14:53:59,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:53:59,325 INFO L495 AbstractCegarLoop]: Abstraction has 383048 states and 557579 transitions. [2023-12-02 14:53:59,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 14:53:59,325 INFO L276 IsEmpty]: Start isEmpty. Operand 383048 states and 557579 transitions. [2023-12-02 14:53:59,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-02 14:53:59,328 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:53:59,328 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:53:59,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 14:53:59,329 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:53:59,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:53:59,329 INFO L85 PathProgramCache]: Analyzing trace with hash -2127985772, now seen corresponding path program 1 times [2023-12-02 14:53:59,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:53:59,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525915658] [2023-12-02 14:53:59,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:53:59,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:53:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:53:59,898 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 14:53:59,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:53:59,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525915658] [2023-12-02 14:53:59,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525915658] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:53:59,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:53:59,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 14:53:59,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397469561] [2023-12-02 14:53:59,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:53:59,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:53:59,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:53:59,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:53:59,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:53:59,901 INFO L87 Difference]: Start difference. First operand 383048 states and 557579 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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)