./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/max-2-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/max-2-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje --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 d56d1653edfb1a7b1c72e82d390b1b74d1df9114797a2f1426eb2285f6c4408f --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:39:38,085 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:39:38,237 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:39:38,243 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:39:38,244 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:39:38,281 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:39:38,282 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:39:38,282 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:39:38,283 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:39:38,285 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:39:38,287 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:39:38,287 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:39:38,288 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:39:38,288 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:39:38,289 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:39:38,289 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:39:38,289 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:39:38,290 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:39:38,290 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:39:38,290 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:39:38,291 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:39:38,295 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:39:38,296 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:39:38,298 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:39:38,299 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:39:38,299 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:39:38,300 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:39:38,300 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:39:38,301 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:39:38,301 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:39:38,301 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:39:38,301 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:39:38,302 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:39:38,302 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:39:38,302 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:39:38,303 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:39:38,303 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:39:38,303 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:39:38,304 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:39:38,305 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:39:38,306 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:39:38,306 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:39:38,307 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:39:38,307 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:39:38,308 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:39:38,308 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:39:38,308 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:39:38,308 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_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d56d1653edfb1a7b1c72e82d390b1b74d1df9114797a2f1426eb2285f6c4408f [2024-11-09 05:39:38,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:39:38,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:39:38,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:39:38,733 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:39:38,734 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:39:38,736 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-multidimensional/max-2-u.c Unable to find full path for "g++" [2024-11-09 05:39:41,189 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:39:41,447 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:39:41,448 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/sv-benchmarks/c/array-multidimensional/max-2-u.c [2024-11-09 05:39:41,458 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/data/98f2bbbfa/9c363aba7dc04cf881d3c3cbd9cdc696/FLAGedab1fa10 [2024-11-09 05:39:41,795 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/data/98f2bbbfa/9c363aba7dc04cf881d3c3cbd9cdc696 [2024-11-09 05:39:41,798 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:39:41,800 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:39:41,802 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:39:41,802 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:39:41,812 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:39:41,813 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:39:41" (1/1) ... [2024-11-09 05:39:41,818 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61616ada and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:39:41, skipping insertion in model container [2024-11-09 05:39:41,819 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:39:41" (1/1) ... [2024-11-09 05:39:41,846 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:39:42,057 WARN L250 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_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/sv-benchmarks/c/array-multidimensional/max-2-u.c[319,332] [2024-11-09 05:39:42,087 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:39:42,103 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:39:42,120 WARN L250 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_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/sv-benchmarks/c/array-multidimensional/max-2-u.c[319,332] [2024-11-09 05:39:42,140 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:39:42,179 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:39:42,179 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:39:42 WrapperNode [2024-11-09 05:39:42,180 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:39:42,181 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:39:42,181 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:39:42,182 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:39:42,192 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:39:42" (1/1) ... [2024-11-09 05:39:42,201 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:39:42" (1/1) ... [2024-11-09 05:39:42,230 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2024-11-09 05:39:42,233 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:39:42,234 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:39:42,234 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:39:42,234 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:39:42,247 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:39:42" (1/1) ... [2024-11-09 05:39:42,248 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:39:42" (1/1) ... [2024-11-09 05:39:42,254 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:39:42" (1/1) ... [2024-11-09 05:39:42,254 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:39:42" (1/1) ... [2024-11-09 05:39:42,265 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:39:42" (1/1) ... [2024-11-09 05:39:42,274 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:39:42" (1/1) ... [2024-11-09 05:39:42,278 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:39:42" (1/1) ... [2024-11-09 05:39:42,283 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:39:42" (1/1) ... [2024-11-09 05:39:42,285 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:39:42,290 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:39:42,290 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:39:42,290 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:39:42,291 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:39:42" (1/1) ... [2024-11-09 05:39:42,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:39:42,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:39:42,333 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:39:42,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:39:42,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:39:42,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:39:42,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 05:39:42,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 05:39:42,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:39:42,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:39:42,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 05:39:42,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 05:39:42,487 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:39:42,490 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:39:42,890 INFO L? ?]: Removed 25 outVars from TransFormulas that were not future-live. [2024-11-09 05:39:42,890 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:39:42,941 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:39:42,942 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 05:39:42,942 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:39:42 BoogieIcfgContainer [2024-11-09 05:39:42,943 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:39:42,945 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:39:42,946 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:39:42,950 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:39:42,950 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:39:41" (1/3) ... [2024-11-09 05:39:42,951 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34eb36a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:39:42, skipping insertion in model container [2024-11-09 05:39:42,951 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:39:42" (2/3) ... [2024-11-09 05:39:42,952 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34eb36a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:39:42, skipping insertion in model container [2024-11-09 05:39:42,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:39:42" (3/3) ... [2024-11-09 05:39:42,957 INFO L112 eAbstractionObserver]: Analyzing ICFG max-2-u.c [2024-11-09 05:39:42,978 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:39:42,978 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:39:43,053 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:39:43,062 INFO L333 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, 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;@79277901, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:39:43,063 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:39:43,068 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 23 states have internal predecessors, (36), 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) [2024-11-09 05:39:43,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 05:39:43,076 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:39:43,077 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:39:43,078 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:39:43,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:39:43,084 INFO L85 PathProgramCache]: Analyzing trace with hash -179246058, now seen corresponding path program 1 times [2024-11-09 05:39:43,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:39:43,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709653503] [2024-11-09 05:39:43,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:39:43,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:39:43,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:39:43,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:39:43,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:39:43,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709653503] [2024-11-09 05:39:43,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709653503] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:39:43,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:39:43,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:39:43,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903972873] [2024-11-09 05:39:43,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:39:43,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:39:43,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:39:43,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:39:43,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:39:43,490 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 23 states have internal predecessors, (36), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2024-11-09 05:39:43,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:39:43,620 INFO L93 Difference]: Finished difference Result 47 states and 71 transitions. [2024-11-09 05:39:43,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:39:43,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2024-11-09 05:39:43,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:39:43,632 INFO L225 Difference]: With dead ends: 47 [2024-11-09 05:39:43,632 INFO L226 Difference]: Without dead ends: 27 [2024-11-09 05:39:43,635 INFO L431 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 [2024-11-09 05:39:43,640 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:39:43,642 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 41 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:39:43,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-09 05:39:43,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2024-11-09 05:39:43,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 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) [2024-11-09 05:39:43,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2024-11-09 05:39:43,682 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 11 [2024-11-09 05:39:43,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:39:43,684 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2024-11-09 05:39:43,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2024-11-09 05:39:43,685 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2024-11-09 05:39:43,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 05:39:43,686 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:39:43,686 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:39:43,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:39:43,687 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:39:43,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:39:43,689 INFO L85 PathProgramCache]: Analyzing trace with hash 939389597, now seen corresponding path program 1 times [2024-11-09 05:39:43,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:39:43,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460292892] [2024-11-09 05:39:43,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:39:43,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:39:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:39:43,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:39:43,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:39:43,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460292892] [2024-11-09 05:39:43,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460292892] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:39:43,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:39:43,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:39:43,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098514757] [2024-11-09 05:39:43,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:39:43,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:39:43,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:39:43,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:39:43,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:39:43,927 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2024-11-09 05:39:44,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:39:44,029 INFO L93 Difference]: Finished difference Result 55 states and 81 transitions. [2024-11-09 05:39:44,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:39:44,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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 15 [2024-11-09 05:39:44,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:39:44,032 INFO L225 Difference]: With dead ends: 55 [2024-11-09 05:39:44,032 INFO L226 Difference]: Without dead ends: 34 [2024-11-09 05:39:44,033 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:39:44,035 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 46 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:39:44,036 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 23 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:39:44,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-09 05:39:44,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2024-11-09 05:39:44,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 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) [2024-11-09 05:39:44,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2024-11-09 05:39:44,045 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 15 [2024-11-09 05:39:44,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:39:44,045 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2024-11-09 05:39:44,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2024-11-09 05:39:44,046 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2024-11-09 05:39:44,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-09 05:39:44,047 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:39:44,047 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:39:44,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 05:39:44,048 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:39:44,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:39:44,049 INFO L85 PathProgramCache]: Analyzing trace with hash -514941374, now seen corresponding path program 1 times [2024-11-09 05:39:44,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:39:44,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491359532] [2024-11-09 05:39:44,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:39:44,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:39:44,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:39:44,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:39:44,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:39:44,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491359532] [2024-11-09 05:39:44,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491359532] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:39:44,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:39:44,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:39:44,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492593690] [2024-11-09 05:39:44,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:39:44,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:39:44,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:39:44,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:39:44,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:39:44,222 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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) [2024-11-09 05:39:44,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:39:44,370 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2024-11-09 05:39:44,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:39:44,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 17 [2024-11-09 05:39:44,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:39:44,373 INFO L225 Difference]: With dead ends: 65 [2024-11-09 05:39:44,374 INFO L226 Difference]: Without dead ends: 53 [2024-11-09 05:39:44,374 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:39:44,376 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 46 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:39:44,377 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 12 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:39:44,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-09 05:39:44,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2024-11-09 05:39:44,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 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) [2024-11-09 05:39:44,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2024-11-09 05:39:44,388 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 17 [2024-11-09 05:39:44,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:39:44,391 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2024-11-09 05:39:44,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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) [2024-11-09 05:39:44,391 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2024-11-09 05:39:44,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-09 05:39:44,392 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:39:44,392 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:39:44,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 05:39:44,393 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:39:44,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:39:44,397 INFO L85 PathProgramCache]: Analyzing trace with hash 102617995, now seen corresponding path program 1 times [2024-11-09 05:39:44,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:39:44,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167061666] [2024-11-09 05:39:44,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:39:44,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:39:44,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:39:44,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:39:44,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:39:44,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167061666] [2024-11-09 05:39:44,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167061666] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:39:44,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656560004] [2024-11-09 05:39:44,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:39:44,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:39:44,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:39:44,580 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:39:44,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:39:44,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:39:44,692 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 05:39:44,699 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:39:44,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:39:44,817 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:39:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:39:44,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656560004] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:39:44,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1478506370] [2024-11-09 05:39:44,897 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 05:39:44,898 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:39:44,903 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:39:44,910 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:39:44,911 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:39:46,550 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:39:46,823 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '512#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= (+ |ULTIMATE.start_main_~max~0#1| 1) (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 05:39:46,824 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:39:46,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:39:46,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-09 05:39:46,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432799571] [2024-11-09 05:39:46,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:39:46,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 05:39:46,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:39:46,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 05:39:46,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2024-11-09 05:39:46,828 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 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) [2024-11-09 05:39:47,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:39:47,037 INFO L93 Difference]: Finished difference Result 88 states and 123 transitions. [2024-11-09 05:39:47,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:39:47,038 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 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 23 [2024-11-09 05:39:47,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:39:47,039 INFO L225 Difference]: With dead ends: 88 [2024-11-09 05:39:47,039 INFO L226 Difference]: Without dead ends: 59 [2024-11-09 05:39:47,040 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2024-11-09 05:39:47,041 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 102 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:39:47,042 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 35 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:39:47,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-09 05:39:47,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2024-11-09 05:39:47,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 52 states have internal predecessors, (63), 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) [2024-11-09 05:39:47,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2024-11-09 05:39:47,053 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 23 [2024-11-09 05:39:47,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:39:47,053 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2024-11-09 05:39:47,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 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) [2024-11-09 05:39:47,054 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2024-11-09 05:39:47,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 05:39:47,055 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:39:47,055 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:39:47,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 05:39:47,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:39:47,258 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:39:47,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:39:47,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1672396960, now seen corresponding path program 2 times [2024-11-09 05:39:47,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:39:47,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450074769] [2024-11-09 05:39:47,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:39:47,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:39:47,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:39:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 05:39:47,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:39:47,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450074769] [2024-11-09 05:39:47,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450074769] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:39:47,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088875657] [2024-11-09 05:39:47,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:39:47,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:39:47,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:39:47,611 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:39:47,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:39:47,701 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 05:39:47,701 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:39:47,703 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 05:39:47,705 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:39:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 05:39:47,841 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:39:47,950 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 05:39:47,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088875657] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:39:47,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [646571892] [2024-11-09 05:39:47,957 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 05:39:47,959 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:39:47,960 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:39:47,960 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:39:47,961 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:39:48,765 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:39:49,097 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '936#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= (+ |ULTIMATE.start_main_~max~0#1| 1) (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 05:39:49,098 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:39:49,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:39:49,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 12 [2024-11-09 05:39:49,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841009455] [2024-11-09 05:39:49,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:39:49,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 05:39:49,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:39:49,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 05:39:49,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2024-11-09 05:39:49,106 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 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) [2024-11-09 05:39:50,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:39:50,231 INFO L93 Difference]: Finished difference Result 346 states and 397 transitions. [2024-11-09 05:39:50,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-09 05:39:50,233 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 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 35 [2024-11-09 05:39:50,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:39:50,240 INFO L225 Difference]: With dead ends: 346 [2024-11-09 05:39:50,240 INFO L226 Difference]: Without dead ends: 296 [2024-11-09 05:39:50,242 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=586, Invalid=1964, Unknown=0, NotChecked=0, Total=2550 [2024-11-09 05:39:50,243 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 726 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:39:50,248 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [726 Valid, 33 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:39:50,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2024-11-09 05:39:50,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 102. [2024-11-09 05:39:50,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 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) [2024-11-09 05:39:50,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2024-11-09 05:39:50,291 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 35 [2024-11-09 05:39:50,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:39:50,292 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2024-11-09 05:39:50,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 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) [2024-11-09 05:39:50,292 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2024-11-09 05:39:50,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 05:39:50,298 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:39:50,298 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:39:50,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:39:50,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:39:50,499 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:39:50,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:39:50,500 INFO L85 PathProgramCache]: Analyzing trace with hash -695546598, now seen corresponding path program 3 times [2024-11-09 05:39:50,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:39:50,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682465084] [2024-11-09 05:39:50,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:39:50,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:39:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:39:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2024-11-09 05:39:50,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:39:50,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682465084] [2024-11-09 05:39:50,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682465084] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:39:50,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467889040] [2024-11-09 05:39:50,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:39:50,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:39:50,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:39:50,897 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:39:50,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:39:51,016 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:39:51,016 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:39:51,018 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 05:39:51,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:39:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 16 proven. 397 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-09 05:39:51,539 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:39:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 16 proven. 397 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-09 05:39:51,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467889040] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:39:51,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [975164603] [2024-11-09 05:39:51,921 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 05:39:51,921 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:39:51,921 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:39:51,922 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:39:51,922 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:39:52,628 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:39:53,065 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2114#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= (+ |ULTIMATE.start_main_~max~0#1| 1) (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 05:39:53,065 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:39:53,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:39:53,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 30 [2024-11-09 05:39:53,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593056034] [2024-11-09 05:39:53,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:39:53,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-09 05:39:53,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:39:53,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-09 05:39:53,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1488, Unknown=0, NotChecked=0, Total=1722 [2024-11-09 05:39:53,074 INFO L87 Difference]: Start difference. First operand 102 states and 115 transitions. Second operand has 30 states, 30 states have (on average 3.5) internal successors, (105), 30 states have internal predecessors, (105), 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) [2024-11-09 05:39:57,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:39:57,433 INFO L93 Difference]: Finished difference Result 911 states and 1013 transitions. [2024-11-09 05:39:57,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-11-09 05:39:57,434 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.5) internal successors, (105), 30 states have internal predecessors, (105), 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 81 [2024-11-09 05:39:57,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:39:57,437 INFO L225 Difference]: With dead ends: 911 [2024-11-09 05:39:57,438 INFO L226 Difference]: Without dead ends: 812 [2024-11-09 05:39:57,445 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5078 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2874, Invalid=11168, Unknown=0, NotChecked=0, Total=14042 [2024-11-09 05:39:57,446 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 3453 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3453 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:39:57,447 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3453 Valid, 171 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 05:39:57,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2024-11-09 05:39:57,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 212. [2024-11-09 05:39:57,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.099526066350711) internal successors, (232), 211 states have internal predecessors, (232), 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) [2024-11-09 05:39:57,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 232 transitions. [2024-11-09 05:39:57,516 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 232 transitions. Word has length 81 [2024-11-09 05:39:57,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:39:57,516 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 232 transitions. [2024-11-09 05:39:57,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.5) internal successors, (105), 30 states have internal predecessors, (105), 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) [2024-11-09 05:39:57,517 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 232 transitions. [2024-11-09 05:39:57,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2024-11-09 05:39:57,529 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:39:57,529 INFO L215 NwaCegarLoop]: trace histogram [60, 60, 10, 10, 10, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:39:57,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 05:39:57,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 05:39:57,734 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:39:57,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:39:57,735 INFO L85 PathProgramCache]: Analyzing trace with hash -835522247, now seen corresponding path program 4 times [2024-11-09 05:39:57,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:39:57,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859780859] [2024-11-09 05:39:57,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:39:57,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:39:57,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:39:58,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4367 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 4330 trivial. 0 not checked. [2024-11-09 05:39:58,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:39:58,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859780859] [2024-11-09 05:39:58,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859780859] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:39:58,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076814092] [2024-11-09 05:39:58,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:39:58,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:39:58,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:39:58,521 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:39:58,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:39:58,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:39:58,726 INFO L255 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:39:58,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:39:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4367 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 4330 trivial. 0 not checked. [2024-11-09 05:39:58,899 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:39:59,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4367 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 4330 trivial. 0 not checked. [2024-11-09 05:39:59,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076814092] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:39:59,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [419374154] [2024-11-09 05:39:59,109 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 05:39:59,110 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:39:59,110 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:39:59,110 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:39:59,111 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:40:00,512 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:40:01,035 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5007#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= (+ |ULTIMATE.start_main_~max~0#1| 1) (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 05:40:01,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:40:01,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:40:01,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-09 05:40:01,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838253365] [2024-11-09 05:40:01,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:40:01,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 05:40:01,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:40:01,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 05:40:01,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 05:40:01,039 INFO L87 Difference]: Start difference. First operand 212 states and 232 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 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) [2024-11-09 05:40:01,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:40:01,636 INFO L93 Difference]: Finished difference Result 655 states and 786 transitions. [2024-11-09 05:40:01,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 05:40:01,637 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 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 187 [2024-11-09 05:40:01,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:40:01,640 INFO L225 Difference]: With dead ends: 655 [2024-11-09 05:40:01,640 INFO L226 Difference]: Without dead ends: 446 [2024-11-09 05:40:01,642 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=466, Invalid=1514, Unknown=0, NotChecked=0, Total=1980 [2024-11-09 05:40:01,643 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 325 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:40:01,643 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 90 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:40:01,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2024-11-09 05:40:01,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 420. [2024-11-09 05:40:01,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 1.0692124105011933) internal successors, (448), 419 states have internal predecessors, (448), 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) [2024-11-09 05:40:01,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 448 transitions. [2024-11-09 05:40:01,704 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 448 transitions. Word has length 187 [2024-11-09 05:40:01,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:40:01,707 INFO L471 AbstractCegarLoop]: Abstraction has 420 states and 448 transitions. [2024-11-09 05:40:01,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 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) [2024-11-09 05:40:01,708 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 448 transitions. [2024-11-09 05:40:01,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2024-11-09 05:40:01,721 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:40:01,722 INFO L215 NwaCegarLoop]: trace histogram [140, 140, 14, 14, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:40:01,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 05:40:01,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:40:01,923 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:40:01,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:40:01,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1604989953, now seen corresponding path program 5 times [2024-11-09 05:40:01,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:40:01,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82443981] [2024-11-09 05:40:01,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:40:01,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:40:02,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:40:04,167 INFO L134 CoverageAnalysis]: Checked inductivity of 21247 backedges. 1 proven. 196 refuted. 0 times theorem prover too weak. 21050 trivial. 0 not checked. [2024-11-09 05:40:04,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:40:04,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82443981] [2024-11-09 05:40:04,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82443981] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:40:04,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209474150] [2024-11-09 05:40:04,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:40:04,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:40:04,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:40:04,171 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:40:04,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:40:04,353 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 05:40:04,353 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:40:04,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 05:40:04,364 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:40:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 21247 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21246 trivial. 0 not checked. [2024-11-09 05:40:04,558 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:40:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 21247 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21246 trivial. 0 not checked. [2024-11-09 05:40:04,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209474150] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:40:04,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [173047961] [2024-11-09 05:40:04,711 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 05:40:04,711 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:40:04,711 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:40:04,712 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:40:04,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:40:05,408 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:40:05,762 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8788#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= (+ |ULTIMATE.start_main_~max~0#1| 1) (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 05:40:05,762 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:40:05,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:40:05,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 3, 3] total 21 [2024-11-09 05:40:05,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171100775] [2024-11-09 05:40:05,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:40:05,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 05:40:05,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:40:05,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 05:40:05,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 05:40:05,765 INFO L87 Difference]: Start difference. First operand 420 states and 448 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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) [2024-11-09 05:40:08,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:40:08,647 INFO L93 Difference]: Finished difference Result 1011 states and 1077 transitions. [2024-11-09 05:40:08,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-11-09 05:40:08,648 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 363 [2024-11-09 05:40:08,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:40:08,651 INFO L225 Difference]: With dead ends: 1011 [2024-11-09 05:40:08,651 INFO L226 Difference]: Without dead ends: 594 [2024-11-09 05:40:08,656 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1182 GetRequests, 1073 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4041 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3079, Invalid=9131, Unknown=0, NotChecked=0, Total=12210 [2024-11-09 05:40:08,657 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 554 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:40:08,658 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [554 Valid, 77 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:40:08,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2024-11-09 05:40:08,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 547. [2024-11-09 05:40:08,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 1.0586080586080586) internal successors, (578), 546 states have internal predecessors, (578), 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) [2024-11-09 05:40:08,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 578 transitions. [2024-11-09 05:40:08,774 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 578 transitions. Word has length 363 [2024-11-09 05:40:08,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:40:08,775 INFO L471 AbstractCegarLoop]: Abstraction has 547 states and 578 transitions. [2024-11-09 05:40:08,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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) [2024-11-09 05:40:08,775 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 578 transitions. [2024-11-09 05:40:08,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2024-11-09 05:40:08,789 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:40:08,789 INFO L215 NwaCegarLoop]: trace histogram [150, 150, 60, 60, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:40:08,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 05:40:08,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:40:08,990 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:40:08,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:40:08,991 INFO L85 PathProgramCache]: Analyzing trace with hash -401607920, now seen corresponding path program 6 times [2024-11-09 05:40:08,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:40:08,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139120169] [2024-11-09 05:40:08,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:40:08,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:40:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:40:11,681 INFO L134 CoverageAnalysis]: Checked inductivity of 27848 backedges. 1450 proven. 225 refuted. 0 times theorem prover too weak. 26173 trivial. 0 not checked. [2024-11-09 05:40:11,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:40:11,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139120169] [2024-11-09 05:40:11,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139120169] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:40:11,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236378523] [2024-11-09 05:40:11,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:40:11,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:40:11,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:40:11,687 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:40:11,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:40:12,086 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:40:12,087 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:40:12,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-09 05:40:12,105 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:40:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 27848 backedges. 196 proven. 21819 refuted. 0 times theorem prover too weak. 5833 trivial. 0 not checked. [2024-11-09 05:40:14,242 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:40:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 27848 backedges. 196 proven. 21819 refuted. 0 times theorem prover too weak. 5833 trivial. 0 not checked. [2024-11-09 05:40:15,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236378523] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:40:15,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1195418693] [2024-11-09 05:40:15,872 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 05:40:15,873 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:40:15,873 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:40:15,873 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:40:15,874 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:40:16,391 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:40:16,982 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14209#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= (+ |ULTIMATE.start_main_~max~0#1| 1) (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 05:40:16,983 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:40:16,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:40:16,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29, 29] total 73 [2024-11-09 05:40:16,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622071694] [2024-11-09 05:40:16,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:40:16,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-09 05:40:16,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:40:16,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-09 05:40:16,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1003, Invalid=6137, Unknown=0, NotChecked=0, Total=7140 [2024-11-09 05:40:16,990 INFO L87 Difference]: Start difference. First operand 547 states and 578 transitions. Second operand has 73 states, 73 states have (on average 3.3424657534246576) internal successors, (244), 73 states have internal predecessors, (244), 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) [2024-11-09 05:41:06,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:41:06,217 INFO L93 Difference]: Finished difference Result 4493 states and 4689 transitions. [2024-11-09 05:41:06,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 399 states. [2024-11-09 05:41:06,217 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.3424657534246576) internal successors, (244), 73 states have internal predecessors, (244), 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 487 [2024-11-09 05:41:06,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:41:06,233 INFO L225 Difference]: With dead ends: 4493 [2024-11-09 05:41:06,234 INFO L226 Difference]: Without dead ends: 3980 [2024-11-09 05:41:06,257 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2252 GetRequests, 1774 SyntacticMatches, 0 SemanticMatches, 478 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95380 ImplicationChecksByTransitivity, 42.0s TimeCoverageRelationStatistics Valid=50736, Invalid=179184, Unknown=0, NotChecked=0, Total=229920 [2024-11-09 05:41:06,257 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 23726 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 2038 mSolverCounterSat, 2734 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23726 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 4772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2734 IncrementalHoareTripleChecker+Valid, 2038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:41:06,258 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23726 Valid, 686 Invalid, 4772 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2734 Valid, 2038 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2024-11-09 05:41:06,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3980 states. [2024-11-09 05:41:06,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3980 to 1011. [2024-11-09 05:41:06,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 1.0445544554455446) internal successors, (1055), 1010 states have internal predecessors, (1055), 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) [2024-11-09 05:41:06,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 1055 transitions. [2024-11-09 05:41:06,406 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 1055 transitions. Word has length 487 [2024-11-09 05:41:06,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:41:06,407 INFO L471 AbstractCegarLoop]: Abstraction has 1011 states and 1055 transitions. [2024-11-09 05:41:06,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.3424657534246576) internal successors, (244), 73 states have internal predecessors, (244), 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) [2024-11-09 05:41:06,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 1055 transitions. [2024-11-09 05:41:06,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 948 [2024-11-09 05:41:06,419 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:41:06,419 INFO L215 NwaCegarLoop]: trace histogram [352, 352, 64, 64, 22, 22, 22, 22, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:41:06,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 05:41:06,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:41:06,624 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:41:06,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:41:06,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1723409164, now seen corresponding path program 7 times [2024-11-09 05:41:06,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:41:06,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030013778] [2024-11-09 05:41:06,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:41:06,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:41:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:41:10,653 INFO L134 CoverageAnalysis]: Checked inductivity of 136558 backedges. 1642 proven. 256 refuted. 0 times theorem prover too weak. 134660 trivial. 0 not checked. [2024-11-09 05:41:10,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:41:10,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030013778] [2024-11-09 05:41:10,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030013778] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:41:10,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041078066] [2024-11-09 05:41:10,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:41:10,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:41:10,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:41:10,657 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:41:10,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:41:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:41:11,493 INFO L255 TraceCheckSpWp]: Trace formula consists of 2648 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 05:41:11,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:41:11,969 INFO L134 CoverageAnalysis]: Checked inductivity of 136558 backedges. 1642 proven. 256 refuted. 0 times theorem prover too weak. 134660 trivial. 0 not checked. [2024-11-09 05:41:11,970 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:41:12,772 INFO L134 CoverageAnalysis]: Checked inductivity of 136558 backedges. 1642 proven. 256 refuted. 0 times theorem prover too weak. 134660 trivial. 0 not checked. [2024-11-09 05:41:12,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041078066] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:41:12,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1102561998] [2024-11-09 05:41:12,776 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 05:41:12,777 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:41:12,777 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:41:12,777 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:41:12,777 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:41:13,552 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:41:14,082 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28562#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= (+ |ULTIMATE.start_main_~max~0#1| 1) (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 05:41:14,083 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:41:14,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:41:14,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 54 [2024-11-09 05:41:14,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399878852] [2024-11-09 05:41:14,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:41:14,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-09 05:41:14,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:41:14,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-09 05:41:14,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1372, Invalid=3184, Unknown=0, NotChecked=0, Total=4556 [2024-11-09 05:41:14,088 INFO L87 Difference]: Start difference. First operand 1011 states and 1055 transitions. Second operand has 55 states, 55 states have (on average 2.327272727272727) internal successors, (128), 54 states have internal predecessors, (128), 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) [2024-11-09 05:41:15,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:41:15,534 INFO L93 Difference]: Finished difference Result 3060 states and 3618 transitions. [2024-11-09 05:41:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-09 05:41:15,534 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.327272727272727) internal successors, (128), 54 states have internal predecessors, (128), 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 947 [2024-11-09 05:41:15,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:41:15,542 INFO L225 Difference]: With dead ends: 3060 [2024-11-09 05:41:15,542 INFO L226 Difference]: Without dead ends: 2085 [2024-11-09 05:41:15,546 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2875 GetRequests, 2792 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3085 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2036, Invalid=5104, Unknown=0, NotChecked=0, Total=7140 [2024-11-09 05:41:15,547 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 1209 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1209 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:41:15,547 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1209 Valid, 158 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:41:15,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2024-11-09 05:41:15,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 2019. [2024-11-09 05:41:15,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2019 states, 2018 states have (on average 1.031219028741328) internal successors, (2081), 2018 states have internal predecessors, (2081), 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) [2024-11-09 05:41:15,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 2081 transitions. [2024-11-09 05:41:15,864 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 2081 transitions. Word has length 947 [2024-11-09 05:41:15,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:41:15,865 INFO L471 AbstractCegarLoop]: Abstraction has 2019 states and 2081 transitions. [2024-11-09 05:41:15,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.327272727272727) internal successors, (128), 54 states have internal predecessors, (128), 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) [2024-11-09 05:41:15,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 2081 transitions. [2024-11-09 05:41:15,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1884 [2024-11-09 05:41:15,901 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:41:15,902 INFO L215 NwaCegarLoop]: trace histogram [748, 748, 136, 136, 22, 22, 22, 22, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:41:15,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 05:41:16,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:41:16,103 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:41:16,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:41:16,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1559602548, now seen corresponding path program 8 times [2024-11-09 05:41:16,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:41:16,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018536793] [2024-11-09 05:41:16,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:41:16,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:41:17,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:41:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 595090 backedges. 7150 proven. 1156 refuted. 0 times theorem prover too weak. 586784 trivial. 0 not checked. [2024-11-09 05:41:29,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:41:29,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018536793] [2024-11-09 05:41:29,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018536793] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:41:29,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176110443] [2024-11-09 05:41:29,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:41:29,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:41:29,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:41:29,098 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:41:29,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ebbf4fa-540d-4d25-8cfd-b1b08b2b3c61/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process