./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/n.c24.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/n.c24.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:45:49,007 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:45:49,125 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:45:49,137 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:45:49,138 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:45:49,168 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:45:49,169 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:45:49,170 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:45:49,170 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:45:49,171 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:45:49,172 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:45:49,172 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:45:49,173 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:45:49,174 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:45:49,174 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:45:49,175 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:45:49,175 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:45:49,180 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:45:49,181 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:45:49,181 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:45:49,182 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:45:49,182 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:45:49,183 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:45:49,184 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:45:49,185 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:45:49,185 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:45:49,186 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:45:49,186 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:45:49,187 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:45:49,187 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:45:49,189 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:45:49,189 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:45:49,189 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:45:49,189 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:45:49,190 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:45:49,190 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:45:49,190 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:45:49,191 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:45:49,191 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:45:49,191 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:45:49,192 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:45:49,192 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:45:49,192 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:45:49,193 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:45:49,193 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:45:49,193 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_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d [2023-11-12 00:45:49,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:45:49,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:45:49,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:45:49,547 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:45:49,547 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:45:49,550 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/loops/n.c24.i [2023-11-12 00:45:52,723 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:45:53,027 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:45:53,027 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/sv-benchmarks/c/loops/n.c24.i [2023-11-12 00:45:53,040 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/data/e0ddbd8c5/fe946cc996574494a1a0aa8234adcfb9/FLAG87408569d [2023-11-12 00:45:53,056 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/data/e0ddbd8c5/fe946cc996574494a1a0aa8234adcfb9 [2023-11-12 00:45:53,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:45:53,064 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:45:53,067 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:45:53,068 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:45:53,073 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:45:53,074 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:45:53" (1/1) ... [2023-11-12 00:45:53,076 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@569391e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:53, skipping insertion in model container [2023-11-12 00:45:53,076 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:45:53" (1/1) ... [2023-11-12 00:45:53,119 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:45:53,299 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_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/sv-benchmarks/c/loops/n.c24.i[805,818] [2023-11-12 00:45:53,358 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:45:53,371 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:45:53,391 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_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/sv-benchmarks/c/loops/n.c24.i[805,818] [2023-11-12 00:45:53,410 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:45:53,434 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:45:53,434 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:53 WrapperNode [2023-11-12 00:45:53,434 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:45:53,436 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:45:53,436 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:45:53,436 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:45:53,444 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:53" (1/1) ... [2023-11-12 00:45:53,455 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:53" (1/1) ... [2023-11-12 00:45:53,484 INFO L138 Inliner]: procedures = 68, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 158 [2023-11-12 00:45:53,488 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:45:53,489 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:45:53,489 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:45:53,489 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:45:53,497 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:53" (1/1) ... [2023-11-12 00:45:53,497 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:53" (1/1) ... [2023-11-12 00:45:53,500 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:53" (1/1) ... [2023-11-12 00:45:53,500 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:53" (1/1) ... [2023-11-12 00:45:53,508 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:53" (1/1) ... [2023-11-12 00:45:53,512 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:53" (1/1) ... [2023-11-12 00:45:53,514 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:53" (1/1) ... [2023-11-12 00:45:53,516 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:53" (1/1) ... [2023-11-12 00:45:53,519 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:45:53,527 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:45:53,528 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:45:53,528 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:45:53,529 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:53" (1/1) ... [2023-11-12 00:45:53,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:45:53,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:53,570 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:45:53,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:45:53,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:45:53,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-12 00:45:53,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:45:53,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:45:53,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:45:53,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:45:53,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:45:53,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-12 00:45:53,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:45:53,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:45:53,707 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:45:53,708 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:45:53,965 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:45:54,085 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:45:54,086 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-12 00:45:54,088 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:45:54 BoogieIcfgContainer [2023-11-12 00:45:54,088 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:45:54,099 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:45:54,100 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:45:54,104 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:45:54,104 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:45:53" (1/3) ... [2023-11-12 00:45:54,105 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34168e4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:45:54, skipping insertion in model container [2023-11-12 00:45:54,105 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:53" (2/3) ... [2023-11-12 00:45:54,106 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34168e4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:45:54, skipping insertion in model container [2023-11-12 00:45:54,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:45:54" (3/3) ... [2023-11-12 00:45:54,108 INFO L112 eAbstractionObserver]: Analyzing ICFG n.c24.i [2023-11-12 00:45:54,123 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:45:54,124 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:45:54,168 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:45:54,175 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;@6c2273d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:45:54,175 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:45:54,181 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.7) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:54,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 00:45:54,189 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:54,189 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 00:45:54,191 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:54,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:54,199 INFO L85 PathProgramCache]: Analyzing trace with hash 155979844, now seen corresponding path program 1 times [2023-11-12 00:45:54,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:54,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905704231] [2023-11-12 00:45:54,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:54,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:54,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:54,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:45:54,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:54,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905704231] [2023-11-12 00:45:54,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905704231] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:45:54,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:45:54,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:45:54,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240177497] [2023-11-12 00:45:54,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:45:54,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:45:54,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:54,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:45:54,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:45:54,519 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.7) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:54,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:54,590 INFO L93 Difference]: Finished difference Result 58 states and 93 transitions. [2023-11-12 00:45:54,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:45:54,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-12 00:45:54,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:54,601 INFO L225 Difference]: With dead ends: 58 [2023-11-12 00:45:54,602 INFO L226 Difference]: Without dead ends: 34 [2023-11-12 00:45:54,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:45:54,609 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 22 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:54,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:45:54,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-12 00:45:54,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 21. [2023-11-12 00:45:54,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:54,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2023-11-12 00:45:54,645 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 5 [2023-11-12 00:45:54,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:54,645 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2023-11-12 00:45:54,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:54,646 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2023-11-12 00:45:54,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 00:45:54,646 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:54,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:45:54,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:45:54,647 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:54,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:54,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1723060144, now seen corresponding path program 1 times [2023-11-12 00:45:54,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:54,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795390599] [2023-11-12 00:45:54,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:54,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:45:54,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:54,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795390599] [2023-11-12 00:45:54,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795390599] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:45:54,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893414299] [2023-11-12 00:45:54,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:54,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:54,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:54,804 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:54,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:45:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:54,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:45:54,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:54,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:45:54,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:45:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:45:55,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893414299] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:45:55,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2080667290] [2023-11-12 00:45:55,029 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-12 00:45:55,029 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:45:55,033 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:45:55,039 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:45:55,040 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:45:55,924 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:45:56,190 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '193#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (or (< 1000 |ULTIMATE.start_main_~offset~0#1|) (< |ULTIMATE.start_main_~offset~0#1| 0)))' at error location [2023-11-12 00:45:56,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:45:56,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:45:56,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 00:45:56,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309671258] [2023-11-12 00:45:56,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:45:56,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:45:56,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:56,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:45:56,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:45:56,199 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:56,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:56,351 INFO L93 Difference]: Finished difference Result 84 states and 121 transitions. [2023-11-12 00:45:56,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:45:56,353 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-12 00:45:56,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:56,355 INFO L225 Difference]: With dead ends: 84 [2023-11-12 00:45:56,356 INFO L226 Difference]: Without dead ends: 66 [2023-11-12 00:45:56,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:45:56,360 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 95 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:56,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 62 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:45:56,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-12 00:45:56,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-11-12 00:45:56,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.4) internal successors, (91), 65 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:56,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 91 transitions. [2023-11-12 00:45:56,386 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 91 transitions. Word has length 10 [2023-11-12 00:45:56,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:56,387 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 91 transitions. [2023-11-12 00:45:56,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:56,387 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 91 transitions. [2023-11-12 00:45:56,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-12 00:45:56,389 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:56,390 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-11-12 00:45:56,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:45:56,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-12 00:45:56,596 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:56,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:56,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1970359796, now seen corresponding path program 2 times [2023-11-12 00:45:56,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:56,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548995373] [2023-11-12 00:45:56,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:56,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-12 00:45:56,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:56,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548995373] [2023-11-12 00:45:56,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548995373] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:45:56,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:45:56,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:45:56,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634111149] [2023-11-12 00:45:56,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:45:56,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:45:56,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:56,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:45:56,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:45:56,838 INFO L87 Difference]: Start difference. First operand 66 states and 91 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:56,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:56,904 INFO L93 Difference]: Finished difference Result 123 states and 172 transitions. [2023-11-12 00:45:56,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:45:56,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-12 00:45:56,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:56,907 INFO L225 Difference]: With dead ends: 123 [2023-11-12 00:45:56,907 INFO L226 Difference]: Without dead ends: 120 [2023-11-12 00:45:56,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:45:56,909 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:56,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 55 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:45:56,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-11-12 00:45:56,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 67. [2023-11-12 00:45:56,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 66 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:56,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 93 transitions. [2023-11-12 00:45:56,923 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 93 transitions. Word has length 25 [2023-11-12 00:45:56,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:56,924 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 93 transitions. [2023-11-12 00:45:56,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:56,924 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 93 transitions. [2023-11-12 00:45:56,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-12 00:45:56,926 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:56,926 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:45:56,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:45:56,927 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:56,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:56,927 INFO L85 PathProgramCache]: Analyzing trace with hash -635862831, now seen corresponding path program 1 times [2023-11-12 00:45:56,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:56,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006595667] [2023-11-12 00:45:56,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:56,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-12 00:45:57,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:57,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006595667] [2023-11-12 00:45:57,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006595667] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:45:57,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486856686] [2023-11-12 00:45:57,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:57,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:57,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:57,094 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:57,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:45:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:57,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:45:57,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:57,244 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-12 00:45:57,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:45:57,310 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-12 00:45:57,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486856686] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:45:57,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [371640772] [2023-11-12 00:45:57,315 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-12 00:45:57,316 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:45:57,316 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:45:57,317 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:45:57,317 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:45:58,445 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:45:58,990 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '857#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (or (< 1000 |ULTIMATE.start_main_~offset~0#1|) (< |ULTIMATE.start_main_~offset~0#1| 0)))' at error location [2023-11-12 00:45:58,990 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:45:58,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:45:58,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-12 00:45:58,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972691320] [2023-11-12 00:45:58,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:45:58,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 00:45:58,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:58,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 00:45:58,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2023-11-12 00:45:58,993 INFO L87 Difference]: Start difference. First operand 67 states and 93 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:59,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:59,199 INFO L93 Difference]: Finished difference Result 231 states and 336 transitions. [2023-11-12 00:45:59,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 00:45:59,200 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-12 00:45:59,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:59,203 INFO L225 Difference]: With dead ends: 231 [2023-11-12 00:45:59,203 INFO L226 Difference]: Without dead ends: 170 [2023-11-12 00:45:59,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2023-11-12 00:45:59,205 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 361 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:59,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 151 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:45:59,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-11-12 00:45:59,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 157. [2023-11-12 00:45:59,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.4038461538461537) internal successors, (219), 156 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:59,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 219 transitions. [2023-11-12 00:45:59,224 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 219 transitions. Word has length 29 [2023-11-12 00:45:59,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:59,225 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 219 transitions. [2023-11-12 00:45:59,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:59,225 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 219 transitions. [2023-11-12 00:45:59,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-12 00:45:59,228 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:59,228 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:45:59,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 00:45:59,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-12 00:45:59,434 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:59,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:59,434 INFO L85 PathProgramCache]: Analyzing trace with hash 766719869, now seen corresponding path program 2 times [2023-11-12 00:45:59,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:59,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345464498] [2023-11-12 00:45:59,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:59,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-11-12 00:45:59,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:59,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345464498] [2023-11-12 00:45:59,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345464498] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:45:59,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381719758] [2023-11-12 00:45:59,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:45:59,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:59,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:59,816 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:59,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:45:59,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 00:45:59,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:45:59,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 00:45:59,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:00,021 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2023-11-12 00:46:00,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:46:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2023-11-12 00:46:00,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381719758] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:46:00,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1521706040] [2023-11-12 00:46:00,176 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-12 00:46:00,177 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:46:00,177 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:46:00,178 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:46:00,178 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:46:01,115 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:46:02,014 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1784#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (or (< 1000 |ULTIMATE.start_main_~offset~0#1|) (< |ULTIMATE.start_main_~offset~0#1| 0)))' at error location [2023-11-12 00:46:02,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:46:02,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:46:02,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 21 [2023-11-12 00:46:02,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731294813] [2023-11-12 00:46:02,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:46:02,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 00:46:02,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:02,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 00:46:02,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2023-11-12 00:46:02,018 INFO L87 Difference]: Start difference. First operand 157 states and 219 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:04,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:04,581 INFO L93 Difference]: Finished difference Result 850 states and 1220 transitions. [2023-11-12 00:46:04,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-11-12 00:46:04,581 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-11-12 00:46:04,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:04,586 INFO L225 Difference]: With dead ends: 850 [2023-11-12 00:46:04,586 INFO L226 Difference]: Without dead ends: 702 [2023-11-12 00:46:04,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 182 SyntacticMatches, 11 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3534 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2169, Invalid=7731, Unknown=0, NotChecked=0, Total=9900 [2023-11-12 00:46:04,593 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 3139 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3139 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:04,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3139 Valid, 229 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:46:04,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2023-11-12 00:46:04,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 205. [2023-11-12 00:46:04,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.4264705882352942) internal successors, (291), 204 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:04,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 291 transitions. [2023-11-12 00:46:04,659 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 291 transitions. Word has length 59 [2023-11-12 00:46:04,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:04,659 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 291 transitions. [2023-11-12 00:46:04,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:04,660 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 291 transitions. [2023-11-12 00:46:04,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-12 00:46:04,664 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:04,670 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-11-12 00:46:04,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-12 00:46:04,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:04,876 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:04,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:04,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1950682712, now seen corresponding path program 3 times [2023-11-12 00:46:04,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:04,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122791245] [2023-11-12 00:46:04,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:04,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:04,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2023-11-12 00:46:05,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:05,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122791245] [2023-11-12 00:46:05,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122791245] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:46:05,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902164962] [2023-11-12 00:46:05,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:46:05,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:05,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:05,369 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:05,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:46:05,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:46:05,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:46:05,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 00:46:05,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:05,625 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-12 00:46:05,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:46:05,929 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-12 00:46:05,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902164962] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:46:05,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [747103490] [2023-11-12 00:46:05,936 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-12 00:46:05,936 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:46:05,937 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:46:05,937 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:46:05,937 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:46:06,813 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:46:07,557 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3904#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (or (< 1000 |ULTIMATE.start_main_~offset~0#1|) (< |ULTIMATE.start_main_~offset~0#1| 0)))' at error location [2023-11-12 00:46:07,557 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:46:07,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:46:07,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 27 [2023-11-12 00:46:07,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012658380] [2023-11-12 00:46:07,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:46:07,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-12 00:46:07,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:07,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-12 00:46:07,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=869, Unknown=0, NotChecked=0, Total=1260 [2023-11-12 00:46:07,561 INFO L87 Difference]: Start difference. First operand 205 states and 291 transitions. Second operand has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:08,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:08,105 INFO L93 Difference]: Finished difference Result 1048 states and 1570 transitions. [2023-11-12 00:46:08,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-12 00:46:08,106 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2023-11-12 00:46:08,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:08,111 INFO L225 Difference]: With dead ends: 1048 [2023-11-12 00:46:08,112 INFO L226 Difference]: Without dead ends: 856 [2023-11-12 00:46:08,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 193 SyntacticMatches, 12 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=391, Invalid=869, Unknown=0, NotChecked=0, Total=1260 [2023-11-12 00:46:08,115 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1013 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1013 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:08,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1013 Valid, 333 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:46:08,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2023-11-12 00:46:08,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 400. [2023-11-12 00:46:08,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.413533834586466) internal successors, (564), 399 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:08,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 564 transitions. [2023-11-12 00:46:08,169 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 564 transitions. Word has length 76 [2023-11-12 00:46:08,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:08,170 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 564 transitions. [2023-11-12 00:46:08,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:08,170 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 564 transitions. [2023-11-12 00:46:08,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-12 00:46:08,179 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:08,180 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-11-12 00:46:08,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:46:08,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 00:46:08,382 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:08,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:08,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1087608584, now seen corresponding path program 4 times [2023-11-12 00:46:08,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:08,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741542309] [2023-11-12 00:46:08,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:08,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:09,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1248 trivial. 0 not checked. [2023-11-12 00:46:09,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:09,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741542309] [2023-11-12 00:46:09,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741542309] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:46:09,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833414479] [2023-11-12 00:46:09,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:46:09,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:09,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:09,702 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:09,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:46:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:09,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-12 00:46:09,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:10,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1248 trivial. 0 not checked. [2023-11-12 00:46:10,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:46:11,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1248 trivial. 0 not checked. [2023-11-12 00:46:11,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833414479] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:46:11,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [620245721] [2023-11-12 00:46:11,018 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-12 00:46:11,018 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:46:11,019 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:46:11,019 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:46:11,019 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:46:11,771 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:46:12,996 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6824#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (or (< 1000 |ULTIMATE.start_main_~offset~0#1|) (< |ULTIMATE.start_main_~offset~0#1| 0)))' at error location [2023-11-12 00:46:12,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:46:12,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:46:12,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 52 [2023-11-12 00:46:12,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687619260] [2023-11-12 00:46:12,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:46:12,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-12 00:46:12,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:13,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-12 00:46:13,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1418, Invalid=2364, Unknown=0, NotChecked=0, Total=3782 [2023-11-12 00:46:13,002 INFO L87 Difference]: Start difference. First operand 400 states and 564 transitions. Second operand has 53 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 52 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:14,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:14,919 INFO L93 Difference]: Finished difference Result 2075 states and 3104 transitions. [2023-11-12 00:46:14,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-12 00:46:14,920 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 52 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2023-11-12 00:46:14,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:14,930 INFO L225 Difference]: With dead ends: 2075 [2023-11-12 00:46:14,930 INFO L226 Difference]: Without dead ends: 1701 [2023-11-12 00:46:14,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 362 SyntacticMatches, 25 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2804 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1418, Invalid=2364, Unknown=0, NotChecked=0, Total=3782 [2023-11-12 00:46:14,936 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 3097 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3097 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:14,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3097 Valid, 660 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:46:14,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2023-11-12 00:46:15,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 790. [2023-11-12 00:46:15,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 789 states have (on average 1.4068441064638784) internal successors, (1110), 789 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:15,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 1110 transitions. [2023-11-12 00:46:15,054 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 1110 transitions. Word has length 141 [2023-11-12 00:46:15,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:15,055 INFO L495 AbstractCegarLoop]: Abstraction has 790 states and 1110 transitions. [2023-11-12 00:46:15,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 52 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:15,055 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 1110 transitions. [2023-11-12 00:46:15,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-11-12 00:46:15,061 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:15,061 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 50, 50, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-11-12 00:46:15,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:46:15,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 00:46:15,272 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:15,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:15,273 INFO L85 PathProgramCache]: Analyzing trace with hash 389174428, now seen corresponding path program 5 times [2023-11-12 00:46:15,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:15,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641232698] [2023-11-12 00:46:15,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:15,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:15,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:19,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6449 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 5174 trivial. 0 not checked. [2023-11-12 00:46:19,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:19,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641232698] [2023-11-12 00:46:19,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641232698] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:46:19,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602371238] [2023-11-12 00:46:19,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:46:19,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:19,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:19,407 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:19,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6adeb6-3f76-45d1-9ad7-0f788ab6b20c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:46:19,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-12 00:46:19,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:46:19,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 00:46:19,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6449 backedges. 295 proven. 28 refuted. 0 times theorem prover too weak. 6126 trivial. 0 not checked. [2023-11-12 00:46:19,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:46:20,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6449 backedges. 295 proven. 28 refuted. 0 times theorem prover too weak. 6126 trivial. 0 not checked. [2023-11-12 00:46:20,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602371238] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:46:20,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [697633089] [2023-11-12 00:46:20,546 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-12 00:46:20,546 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:46:20,546 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:46:20,546 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:46:20,546 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:46:21,298 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:46:25,047 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12514#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (or (< 1000 |ULTIMATE.start_main_~offset~0#1|) (< |ULTIMATE.start_main_~offset~0#1| 0)))' at error location [2023-11-12 00:46:25,047 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:46:25,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:46:25,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 9, 9] total 67 [2023-11-12 00:46:25,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146671300] [2023-11-12 00:46:25,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:46:25,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-11-12 00:46:25,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:25,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-11-12 00:46:25,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1490, Invalid=4210, Unknown=0, NotChecked=0, Total=5700 [2023-11-12 00:46:25,053 INFO L87 Difference]: Start difference. First operand 790 states and 1110 transitions. Second operand has 67 states, 67 states have (on average 1.6417910447761195) internal successors, (110), 67 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)